Property tax appeal services: Find over-assessed properties with data
Alex Wilkinson
CEO of Houski
2026-03-19
Property tax appeal firms do a lot of manual research. For every case, you look up assessment values, find comparables, calculate per-square-foot values, and build evidence the assessment is too high. Hours per property.
The opportunity: Many properties are over-assessed relative to market value, but finding them requires comparing assessments to market estimates across thousands of properties - tedious manually.
Property data APIs let you pull assessment values and market estimates for many properties at once. Screen entire neighborhoods to find over-assessed properties, then focus on the cases most likely to win.
The basic math: Assessment vs. Market Value
Most appeals come down to: assessed value is higher than what the property would actually sell for.
Houski's API gives you both:
- assessment_value - what the municipality thinks it's worth
- estimate_sale_price - what our model thinks it would sell for
When assessment significantly exceeds the market estimate, you might have a case. Pull both fields in a single properties call, then filter to rows where assessment is more than 10% above the model estimate. The block below is a live call against the real API, the request code and the JSON response are regenerated every time this page is rendered:
API request
TypeScript code
const houski_data = async (): Promise<PropertiesResponse> => {
// You must copy the PropertiesResponse type declarations from the
// Houski API documentation to strongly type the response
const url = new URL('https://api.houski.ca/properties');
url.searchParams.set('api_key', 'YOUR_API_KEY');
url.searchParams.set('city', 'calgary');
url.searchParams.set('country_abbreviation', 'ca');
url.searchParams.set('property_type_eq', 'House');
url.searchParams.set('province_abbreviation', 'ab');
url.searchParams.set('results_per_page', '100');
url.searchParams.set('select', 'property_id,address,community,interior_sq_m,construction_year,bedroom,assessment_value,assessment_year,estimate_sale_price');
const response = await fetch(url);
const data = await response.json();
return data;
}
(async () => {
let data: PropertiesResponse = await houski_data();
// Log the response
console.log(data);
})();
API response
JSON
{
"cache_hit": false,
"cost_cents": 63.0,
"data": [
{
"address": "6 1744 7 Street SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 826706,
"interior_sq_m": 125.882568359375,
"property_id": "10004f7afe0c1946"
},
{
"address": "384 Copperpond Landng SE",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 441172,
"interior_sq_m": 125.882568359375,
"property_id": "10007f9761f49940"
},
{
"address": "239 Dalhurst Way NW",
"assessment_value": 1110000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Dalhousie",
"construction_year": 1971,
"estimate_sale_price": 1012722,
"interior_sq_m": 108.46339416503906,
"property_id": "100086f6bc064d3f"
},
{
"address": "52 Cedargrove Way SW",
"assessment_value": 662000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Cedarbrae",
"construction_year": 1984,
"estimate_sale_price": 614848,
"interior_sq_m": 136.4734344482422,
"property_id": "1000c277cd905d3b"
},
{
"address": "28 Sundown Gr SE",
"assessment_value": 692500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Sundance",
"construction_year": 1988,
"estimate_sale_price": 781636,
"interior_sq_m": 172.61241149902344,
"property_id": "1001109ab2aebbc0"
},
{
"address": "117 Sandpiper Place NW",
"assessment_value": 764500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Sandstone Valley",
"construction_year": 1988,
"estimate_sale_price": 712601,
"interior_sq_m": 142.6978759765625,
"property_id": "1001217184d8717b"
},
{
"address": "7237 California Boulevard NE",
"assessment_value": 671500,
"assessment_year": 2026,
"bedroom": 4,
"community": "Monterey Park",
"construction_year": 1995,
"estimate_sale_price": 671900,
"interior_sq_m": 200.01858520507812,
"property_id": "1001392d95458fc1"
},
{
"address": "C304 4501 37 Street NW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 963101,
"interior_sq_m": 125.882568359375,
"property_id": "10013b5e28e0c630"
},
{
"address": "6619 34 Street SW",
"assessment_value": 868500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Lakeview",
"construction_year": 1964,
"estimate_sale_price": 1009562,
"interior_sq_m": 139.35450744628906,
"property_id": "10014f3c7e5bfad9"
},
{
"address": "188 Mount Aberdeen Close SE",
"assessment_value": 467500,
"assessment_year": 2026,
"bedroom": 3,
"community": "McKenzie Lake",
"construction_year": 1999,
"estimate_sale_price": 486121,
"interior_sq_m": 125.23225402832033,
"property_id": "1001894d82aeeb0c"
},
{
"address": "196 Covemeadow Road NE",
"assessment_value": 582500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Coventry Hills",
"construction_year": 2005,
"estimate_sale_price": 554416,
"interior_sq_m": 115.7562255859375,
"property_id": "1001a75df7bd5267"
},
{
"address": "121 Prestwick Way SE",
"assessment_value": 522500,
"assessment_year": 2026,
"bedroom": 3,
"community": "McKenzie Towne",
"construction_year": 2001,
"estimate_sale_price": 516560,
"interior_sq_m": 104.42214965820312,
"property_id": "1001f28c96629974"
},
{
"address": "1011 Olympia Crescent SE",
"assessment_value": 492500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Ogden",
"construction_year": 1973,
"estimate_sale_price": 494909,
"interior_sq_m": 96.80416107177734,
"property_id": "1001ffcbf6c0248c"
},
{
"address": "432 27 Avenue NW",
"assessment_value": 1200000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Mount Pleasant",
"construction_year": 2005,
"estimate_sale_price": 1166097,
"interior_sq_m": 167.40988159179688,
"property_id": "10021e44aa219b00"
},
{
"address": "168 Coventry Hills Drive NE",
"assessment_value": 644500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Coventry Hills",
"construction_year": 2005,
"estimate_sale_price": 611935,
"interior_sq_m": 172.7982177734375,
"property_id": "1002285fe3ee9c49"
},
{
"address": "1516 49 Street SE",
"assessment_value": 451000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Forest Lawn",
"construction_year": 1959,
"estimate_sale_price": 465441,
"interior_sq_m": 90.67261505126952,
"property_id": "10024c6023d6ca9"
},
{
"address": "2128 Crestwood Road SE",
"assessment_value": 523500,
"assessment_year": 2026,
"bedroom": 2,
"community": "Ogden",
"construction_year": 1955,
"estimate_sale_price": 533257,
"interior_sq_m": 80.96432495117188,
"property_id": "1002822e7b274674"
},
{
"address": "6728 37 Avenue NE",
"assessment_value": 550000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Temple",
"construction_year": 1981,
"estimate_sale_price": 544699,
"interior_sq_m": 109.16062927246094,
"property_id": "100283206befdb78"
},
{
"address": "1005 815 14 Avenue SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 427340,
"interior_sq_m": 125.882568359375,
"property_id": "1002e3ad9cd64ae2"
},
{
"address": "6535 54 Street NW",
"assessment_value": 726000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Dalhousie",
"construction_year": 1972,
"estimate_sale_price": 614755,
"interior_sq_m": 115.19881439208984,
"property_id": "10030424b41ab29b"
},
{
"address": "145 Valley Woods Place NW",
"assessment_value": 852000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Valley Ridge",
"construction_year": 2006,
"estimate_sale_price": 846712,
"interior_sq_m": 199.55406188964844,
"property_id": "10034432c778cb03"
},
{
"address": "205 6704 6 Street SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 973795,
"interior_sq_m": 125.882568359375,
"property_id": "100362b238afdae6"
},
{
"address": "1542 52 Street SE",
"assessment_value": 522500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Penbrooke Meadows",
"construction_year": 1959,
"estimate_sale_price": 564297,
"interior_sq_m": 98.01189422607422,
"property_id": "1003955fedeb5ef7"
},
{
"address": "232 Rundlefield Road NE",
"assessment_value": 517500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Rundle",
"construction_year": 1976,
"estimate_sale_price": 553975,
"interior_sq_m": 102.74990844726562,
"property_id": "1003a8f7e7319598"
},
{
"address": "125 Riverview Court SE",
"assessment_value": 722500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Riverbend",
"construction_year": 1989,
"estimate_sale_price": 698659,
"interior_sq_m": 139.3533935546875,
"property_id": "1003b80b5086a07"
},
{
"address": "1435 25A Street SW",
"assessment_value": 2400000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Shaganappi",
"construction_year": 2016,
"estimate_sale_price": 3087843,
"interior_sq_m": 167.8743896484375,
"property_id": "1003d96e8e607840"
},
{
"address": "52 Tuscany Valley Lane NW",
"assessment_value": 655000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Tuscany",
"construction_year": 1998,
"estimate_sale_price": 655810,
"interior_sq_m": 158.44482421875,
"property_id": "1003eea453087ea3"
},
{
"address": "110 Royal Birch Gardens NW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 618231,
"interior_sq_m": 140.65402221679688,
"property_id": "1003fe4194f1fe08"
},
{
"address": "81 Scandia Hill NW",
"assessment_value": 1050000,
"assessment_year": 2026,
"bedroom": 2,
"community": "Scenic Acres",
"construction_year": 1989,
"estimate_sale_price": 996856,
"interior_sq_m": 188.9632110595703,
"property_id": "10043508321f54ba"
},
{
"address": "61 Rivergreen Crescent SE",
"assessment_value": 688500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Riverbend",
"construction_year": 1988,
"estimate_sale_price": 660927,
"interior_sq_m": 139.3533935546875,
"property_id": "1004738a9262a70d"
},
{
"address": "247 Chapalina Terrace SE",
"assessment_value": 741000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Chaparral",
"construction_year": 2006,
"estimate_sale_price": 728771,
"interior_sq_m": 195.32781982421875,
"property_id": "1004a292757c448e"
},
{
"address": "335 Millrise Drive Southwest",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 782754,
"interior_sq_m": 241.5478973388672,
"property_id": "100523ae7fef83ad"
},
{
"address": "47 Elgin Terrace SE",
"assessment_value": 681000,
"assessment_year": 2026,
"bedroom": 3,
"community": "McKenzie Towne",
"construction_year": 2007,
"estimate_sale_price": 671269,
"interior_sq_m": 188.3128967285156,
"property_id": "10053e86b05542f8"
},
{
"address": "2018 608 9 Street SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 562721,
"interior_sq_m": 125.882568359375,
"property_id": "100556b0922cfec"
},
{
"address": "1309 18 Avenue NW",
"assessment_value": 840000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Capitol Hill",
"construction_year": 1985,
"estimate_sale_price": 846246,
"interior_sq_m": 148.319091796875,
"property_id": "10055f7b25bdcfa4"
},
{
"address": "2104 53 Avenue SW",
"assessment_value": 1270000,
"assessment_year": 2026,
"bedroom": 3,
"community": "North Glenmore Park",
"construction_year": 2014,
"estimate_sale_price": 1249876,
"interior_sq_m": 134.8940887451172,
"property_id": "100570c4133180e3"
},
{
"address": "2404 Pinewood Drive SE",
"assessment_value": 499500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Southview",
"construction_year": 1959,
"estimate_sale_price": 561081,
"interior_sq_m": 97.2686767578125,
"property_id": "100577ee6782c5e1"
},
{
"address": "116 Arbour Crest Terrace NW",
"assessment_value": 706500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Arbour Lake",
"construction_year": 2000,
"estimate_sale_price": 675526,
"interior_sq_m": 161.37123107910156,
"property_id": "1005a96cff4fded8"
},
{
"address": "72 Signature Heights SW",
"assessment_value": 1660000,
"assessment_year": 2026,
"bedroom": 2,
"community": "Signal Hill",
"construction_year": 1993,
"estimate_sale_price": 1784339,
"interior_sq_m": 243.40394592285156,
"property_id": "1005d39b3c800a14"
},
{
"address": "3309 38 Street SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 1188556,
"interior_sq_m": 125.882568359375,
"property_id": "1005f2397f918b79"
},
{
"address": "5047 Vanstone Crescent NW",
"assessment_value": 833500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Varsity",
"construction_year": 1966,
"estimate_sale_price": 970910,
"interior_sq_m": 165.27313232421875,
"property_id": "1005fe608a515e58"
},
{
"address": "4 4460 75 Avenue SE",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 671692,
"interior_sq_m": 125.882568359375,
"property_id": "100649bee655672a"
},
{
"address": "6010 Saddlehorn Drive NE",
"assessment_value": 684500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Saddle Ridge",
"construction_year": 2002,
"estimate_sale_price": 600628,
"interior_sq_m": 134.47604370117188,
"property_id": "100653c322cfca91"
},
{
"address": "143 Marbrooke Circle NE",
"assessment_value": 539500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Marlborough",
"construction_year": 1968,
"estimate_sale_price": 579956,
"interior_sq_m": 104.050537109375,
"property_id": "100655e9b87ae8d1"
},
{
"address": "241 Tuscany Reserve Rise NW",
"assessment_value": 796000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Tuscany",
"construction_year": 2006,
"estimate_sale_price": 817736,
"interior_sq_m": 175.1207733154297,
"property_id": "1006595dbb3b58b6"
},
{
"address": "190 Evansford Circle NW",
"assessment_value": 649500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Evanston",
"construction_year": 2007,
"estimate_sale_price": 623951,
"interior_sq_m": 146.78558349609375,
"property_id": "100672c51cf98d0d"
},
{
"address": "154 Edgevalley Close NW",
"assessment_value": 880000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Edgemont",
"construction_year": 1993,
"estimate_sale_price": 906891,
"interior_sq_m": 129.69155883789062,
"property_id": "100672c744e12d02"
},
{
"address": "246 Covemeadow Bay NE",
"assessment_value": 716000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Coventry Hills",
"construction_year": 2005,
"estimate_sale_price": 668457,
"interior_sq_m": 124.58193969726562,
"property_id": "1006910ea1e8de7d"
},
{
"address": "305 Santana Bay NW",
"assessment_value": 630500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Sandstone Valley",
"construction_year": 1988,
"estimate_sale_price": 623690,
"interior_sq_m": 142.6978759765625,
"property_id": "10069cf80362f9d6"
},
{
"address": "378 Hotchkiss Manor SE",
"assessment_value": 401500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Hotchkiss",
"construction_year": 2025,
"estimate_sale_price": 675045,
"interior_sq_m": 189.5206298828125,
"property_id": "1006b75d27f315d7"
},
{
"address": "37 Country Hills Crescent NW",
"assessment_value": 554500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Country Hills",
"construction_year": 1999,
"estimate_sale_price": 541521,
"interior_sq_m": 130.34188842773438,
"property_id": "1006ea0b26587f1a"
},
{
"address": "237 Mount Douglas Circle SE",
"assessment_value": 833000,
"assessment_year": 2026,
"bedroom": 3,
"community": "McKenzie Lake",
"construction_year": 1998,
"estimate_sale_price": 812006,
"interior_sq_m": 189.1490173339844,
"property_id": "1006f5cb71b2cb4d"
},
{
"address": "87 Castleglen Crescent NE",
"assessment_value": 474500,
"assessment_year": 2026,
"bedroom": 2,
"community": "Castleridge",
"construction_year": 1980,
"estimate_sale_price": 442336,
"interior_sq_m": 89.18617248535156,
"property_id": "100708598cd66dae"
},
{
"address": "4 2770 32 Avenue NE",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 634559,
"interior_sq_m": 125.882568359375,
"property_id": "1007440946afa14b"
},
{
"address": "171 Legacy Glen Prairie SE",
"assessment_value": 641000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Legacy",
"construction_year": 2022,
"estimate_sale_price": 599815,
"interior_sq_m": 151.70941162109375,
"property_id": "1007768d9826331a"
},
{
"address": "212 Brightonstone Gardens SE",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 641138,
"interior_sq_m": 179.3021240234375,
"property_id": "1007a5e8690eaf7b"
},
{
"address": "503 620 67 Avenue SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 623050,
"interior_sq_m": 125.882568359375,
"property_id": "1007c5b6132f4ec"
},
{
"address": "595 Woodpark Crescent SW",
"assessment_value": 950500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Woodlands",
"construction_year": 1976,
"estimate_sale_price": 936719,
"interior_sq_m": 180.50909423828125,
"property_id": "1007cca23b5a0a10"
},
{
"address": "137 Berwick Way NW",
"assessment_value": 509500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Beddington Heights",
"construction_year": 1978,
"estimate_sale_price": 482262,
"interior_sq_m": 100.05574035644533,
"property_id": "1007d7cf25d6c8dc"
},
{
"address": "308 Panatella Boulevard NW",
"assessment_value": 750500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Panorama Hills",
"construction_year": 2005,
"estimate_sale_price": 713977,
"interior_sq_m": 167.27053833007812,
"property_id": "10080305cbdbb466"
},
{
"address": "39 2519 38 Street NE",
"assessment_value": 275000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Rundle",
"construction_year": 1978,
"estimate_sale_price": 315724,
"interior_sq_m": 102.74990844726562,
"property_id": "100854fe964c90d"
},
{
"address": "719 45 Street SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 825712,
"interior_sq_m": 125.882568359375,
"property_id": "10085f08dbb06199"
},
{
"address": "440 Shannon Square SW",
"assessment_value": 643500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Shawnessy",
"construction_year": 2001,
"estimate_sale_price": 645016,
"interior_sq_m": 163.69378662109375,
"property_id": "100871a31a0e35a9"
},
{
"address": "61 Hampstead Gardens NW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 1998,
"estimate_sale_price": 718826,
"interior_sq_m": 186.77999877929688,
"property_id": "1009354318409d7d"
},
{
"address": "31 Panatella Circle NW",
"assessment_value": 804500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Panorama Hills",
"construction_year": 2004,
"estimate_sale_price": 769001,
"interior_sq_m": 201.5514678955078,
"property_id": "1009b9c608997e52"
},
{
"address": "741 Sierra Madre Court SW",
"assessment_value": 876000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Signal Hill",
"construction_year": 1995,
"estimate_sale_price": 861105,
"interior_sq_m": 184.6897125244141,
"property_id": "100a0599289fb1f9"
},
{
"address": "24 Hoover Place SW",
"assessment_value": 924000,
"assessment_year": 2026,
"bedroom": 2,
"community": "Haysboro",
"construction_year": 1958,
"estimate_sale_price": 875221,
"interior_sq_m": 93.45967864990234,
"property_id": "100a43bcbefcc557"
},
{
"address": "11 Chaparral Valley Garden SE",
"assessment_value": 470500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Chaparral",
"construction_year": 2009,
"estimate_sale_price": 497503,
"interior_sq_m": 174.7027130126953,
"property_id": "100a49f6a821f222"
},
{
"address": "10 2126 4 Avenue NW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 752172,
"interior_sq_m": 125.882568359375,
"property_id": "100a763583c3c50f"
},
{
"address": "94 Cougarstone Court Southwest",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 716778,
"interior_sq_m": 181.1609344482422,
"property_id": "100a7aeb6001427"
},
{
"address": "5852 Bow Crescent NW",
"assessment_value": 1250000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Bowness",
"construction_year": 1980,
"estimate_sale_price": 1589084,
"interior_sq_m": 152.638427734375,
"property_id": "100af602324e3847"
},
{
"address": "108 Cheyenne Crescent NW",
"assessment_value": 669500,
"assessment_year": 2026,
"bedroom": 2,
"community": "Charleswood",
"construction_year": 1959,
"estimate_sale_price": 801236,
"interior_sq_m": 135.49795532226562,
"property_id": "100af6cbccc73c57"
},
{
"address": "149 Panorama Hills View NW",
"assessment_value": 825000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Panorama Hills",
"construction_year": 1999,
"estimate_sale_price": 879451,
"interior_sq_m": 224.08026123046875,
"property_id": "100aff0e2b4db155"
},
{
"address": "54 Panamount Road NW",
"assessment_value": 813000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Panorama Hills",
"construction_year": 2008,
"estimate_sale_price": 779089,
"interior_sq_m": 203.92047119140625,
"property_id": "100b2c6e60c8fbad"
},
{
"address": "227 Cranford Close SE",
"assessment_value": 578000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Cranston",
"construction_year": 2012,
"estimate_sale_price": 549197,
"interior_sq_m": 135.07989501953125,
"property_id": "100b45992e3a9842"
},
{
"address": "206 5010 50 Street SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 404567,
"interior_sq_m": 125.882568359375,
"property_id": "100b64a734ee3d98"
},
{
"address": "46 Cranarch View SE",
"assessment_value": 934000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Cranston",
"construction_year": 2015,
"estimate_sale_price": 872543,
"interior_sq_m": 230.2118225097656,
"property_id": "100b7f2dba017cce"
},
{
"address": "148 Whitehaven Road NE",
"assessment_value": 569000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Whitehorn",
"construction_year": 1984,
"estimate_sale_price": 560264,
"interior_sq_m": 98.6622085571289,
"property_id": "100ba0f09365e282"
},
{
"address": "78 Cougar Ridge Crescent SW",
"assessment_value": 879500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Cougar Ridge",
"construction_year": 2003,
"estimate_sale_price": 858392,
"interior_sq_m": 169.82534790039062,
"property_id": "100ba8a3cececaca"
},
{
"address": "56 Northmount Drive NW",
"assessment_value": 541000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Thorncliffe",
"construction_year": 1956,
"estimate_sale_price": 538707,
"interior_sq_m": 114.40914154052734,
"property_id": "100bd0ee45c0a61b"
},
{
"address": "90 Cranridge Terrace SE",
"assessment_value": 928000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Cranston",
"construction_year": 2008,
"estimate_sale_price": 929751,
"interior_sq_m": 240.7562255859375,
"property_id": "100bf13cd6ae2292"
},
{
"address": "422 Mount Sparrowhawk Place SE",
"assessment_value": 999500,
"assessment_year": 2026,
"bedroom": 4,
"community": "McKenzie Lake",
"construction_year": 1992,
"estimate_sale_price": 1035065,
"interior_sq_m": 193.42251586914065,
"property_id": "100c0a0fa63769e1"
},
{
"address": "3414 1620 70 Street SE",
"assessment_value": 278000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Applewood Park",
"construction_year": 2004,
"estimate_sale_price": 271643,
"interior_sq_m": 120.77294921875,
"property_id": "100c1386ba734583"
},
{
"address": "5580 Dalhart Hill NW",
"assessment_value": 697000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Dalhousie",
"construction_year": 1973,
"estimate_sale_price": 701710,
"interior_sq_m": 132.29281616210938,
"property_id": "100c6e3e02fb821e"
},
{
"address": "506 140 10 Avenue SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 661804,
"interior_sq_m": 125.882568359375,
"property_id": "100c84d47be20042"
},
{
"address": "124 Masters Link SE",
"assessment_value": 657500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Mahogany",
"construction_year": 2016,
"estimate_sale_price": 622929,
"interior_sq_m": 155.0538787841797,
"property_id": "100ca7285682a9a7"
},
{
"address": "1307 41 Street SE",
"assessment_value": 464000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Forest Lawn",
"construction_year": 1959,
"estimate_sale_price": 476956,
"interior_sq_m": 90.67261505126952,
"property_id": "100cae11312386e3"
},
{
"address": "171 Prestwick Landng SE",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 523660,
"interior_sq_m": 125.882568359375,
"property_id": "100d050df8008fef"
},
{
"address": "1523 20 Street NW",
"assessment_value": 1320000,
"assessment_year": 2026,
"bedroom": 2,
"community": "Hounsfield Heights-Briar Hill",
"construction_year": 2013,
"estimate_sale_price": 1293049,
"interior_sq_m": 125.23225402832033,
"property_id": "100d08db9c75945b"
},
{
"address": "2502 44 Skyview Py NE",
"assessment_value": 326500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Cityscape",
"construction_year": 2023,
"estimate_sale_price": 388272,
"interior_sq_m": 149.4803466796875,
"property_id": "100d098cf52c82d8"
},
{
"address": "63 Hampstead Way NW",
"assessment_value": 935500,
"assessment_year": 2026,
"bedroom": 4,
"community": "Hamptons",
"construction_year": 2000,
"estimate_sale_price": 900610,
"interior_sq_m": 231.65179443359375,
"property_id": "100d0c60e83859a2"
},
{
"address": "161 Cranwell Bay SE",
"assessment_value": 810500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Cranston",
"construction_year": 2006,
"estimate_sale_price": 803676,
"interior_sq_m": 198.7179412841797,
"property_id": "100d182e8bc2e62"
},
{
"address": "305 2905 Unwin Road NW",
"bedroom": 3,
"community": "University Heights",
"construction_year": 1964,
"estimate_sale_price": 299055,
"interior_sq_m": 125.882568359375,
"property_id": "100d3207ca45079a"
},
{
"address": "24 Westmore Place SW",
"assessment_value": 1090000,
"assessment_year": 2026,
"bedroom": 3,
"community": "West Springs",
"construction_year": 2014,
"estimate_sale_price": 1036326,
"interior_sq_m": 204.756591796875,
"property_id": "100d5a823a3ca83e"
},
{
"address": "2830 Oakmoor Crescent SW",
"assessment_value": 675000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Oakridge",
"construction_year": 1971,
"estimate_sale_price": 663389,
"interior_sq_m": 136.56634521484375,
"property_id": "100db013c3f70024"
},
{
"address": "1402 2416 16 Avenue NW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 929155,
"interior_sq_m": 125.882568359375,
"property_id": "100dd4a731dd6d26"
},
{
"address": "1039 Penmeadows Road SE",
"assessment_value": 479500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Penbrooke Meadows",
"construction_year": 1971,
"estimate_sale_price": 544686,
"interior_sq_m": 103.77183532714844,
"property_id": "100de6d2721b23dd"
},
{
"address": "6 327 19 Avenue SW",
"bedroom": 3,
"community": "Beltline",
"construction_year": 2006,
"estimate_sale_price": 378325,
"interior_sq_m": 125.882568359375,
"property_id": "100e00db61b3aab7"
},
{
"address": "2728 Signal Hill Heights SW",
"assessment_value": 770500,
"assessment_year": 2026,
"bedroom": 3,
"community": "Signal Hill",
"construction_year": 1987,
"estimate_sale_price": 760171,
"interior_sq_m": 167.22547912597656,
"property_id": "100e0c03879b153d"
},
{
"address": "64 Saddlelake Gr NE",
"assessment_value": 825000,
"assessment_year": 2026,
"bedroom": 3,
"community": "Saddle Ridge",
"construction_year": 2011,
"estimate_sale_price": 726116,
"interior_sq_m": 146.87847900390625,
"property_id": "100e2601d4e9c707"
}
],
"error": "",
"pagination": {
"current_page": 1,
"has_next_page": true,
"has_previous_page": false,
"page_total": 4299
},
"price_quote": false,
"result_total": 429809,
"time_ms": 204,
"ui_info": {
"city": "Calgary",
"city_id": "6ec95b53075d062c",
"city_link": "ca/ab/calgary",
"city_slug": "calgary",
"country": "Canada",
"country_abbreviation": "CA",
"country_abbreviation_id": "9ace2b6431b7f1be",
"country_abbreviation_link": "ca",
"country_slug": "canada",
"province": "Alberta",
"province_abbreviation": "AB",
"province_abbreviation_id": "aae1f05a0f89d2c7",
"province_abbreviation_link": "ca/ab",
"province_slug": "alberta"
}
}
See Filter documentation for query options.
Finding comparable properties
For a potential case, you need comparables: similar properties with lower assessments. Filter the same community by a size band roughly 15% around your subject and an age band roughly 10 years either side:
API request
TypeScript code
const houski_data = async (): Promise<PropertiesResponse> => {
// You must copy the PropertiesResponse type declarations from the
// Houski API documentation to strongly type the response
const url = new URL('https://api.houski.ca/properties');
url.searchParams.set('api_key', 'YOUR_API_KEY');
url.searchParams.set('city', 'calgary');
url.searchParams.set('community', 'lake bonavista');
url.searchParams.set('construction_year_gte', '1970');
url.searchParams.set('construction_year_lte', '1990');
url.searchParams.set('country_abbreviation', 'ca');
url.searchParams.set('interior_sq_m_gte', '110');
url.searchParams.set('interior_sq_m_lte', '150');
url.searchParams.set('property_type_eq', 'House');
url.searchParams.set('province_abbreviation', 'ab');
url.searchParams.set('results_per_page', '50');
url.searchParams.set('select', 'address,interior_sq_m,construction_year,bedroom,assessment_value');
const response = await fetch(url);
const data = await response.json();
return data;
}
(async () => {
let data: PropertiesResponse = await houski_data();
// Log the response
console.log(data);
})();
API response
JSON
{
"cache_hit": false,
"cost_cents": 21.0,
"data": [
{
"address": "13039 Lake Twintree Road SE",
"assessment_value": 970000,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "1029fc3ea878f926"
},
{
"address": "1416 Acadia Drive SE",
"assessment_value": 729000,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 114.92010498046876,
"property_id": "103c69d8274b82b0"
},
{
"address": "127 Lake Tahoe Gr SE",
"assessment_value": 1350000,
"bedroom": 3,
"construction_year": 1976,
"interior_sq_m": 130.43478393554688,
"property_id": "103db6085f778cc3"
},
{
"address": "31 Lake Sundance Place SE",
"assessment_value": 867000,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 130.43478393554688,
"property_id": "1040c632b1abec70"
},
{
"address": "552 Lake Moraine Gr SE",
"assessment_value": 1780000,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "104556bb1afca481"
},
{
"address": "136 Lake Bonavista Drive SE",
"assessment_value": 831500,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 140.3753204345703,
"property_id": "104bc0e4cddf8a7"
},
{
"address": "2228 Lake Bonavista Drive SE",
"assessment_value": 929000,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 140.3753204345703,
"property_id": "10827ef5495cc470"
},
{
"address": "12507 Lake Fraser Way SE",
"assessment_value": 954500,
"bedroom": 3,
"construction_year": 1975,
"interior_sq_m": 130.43478393554688,
"property_id": "10bf9020739d6c6f"
},
{
"address": "403 Lake Topaz Crescent SE",
"assessment_value": 829500,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 145.2991485595703,
"property_id": "10d6820b617e3f4f"
},
{
"address": "623 Lake Moraine Way SE",
"assessment_value": 1750000,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 130.43478393554688,
"property_id": "10d691a002801c73"
},
{
"address": "103 Lake Lucerne Close SE",
"assessment_value": 818000,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 137.72760009765625,
"property_id": "10f3c76293d8fc59"
},
{
"address": "40 Lake Wasa Gr SE",
"assessment_value": 903000,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 130.43478393554688,
"property_id": "1102f5250788c4c2"
},
{
"address": "428 135 Avenue SE",
"assessment_value": 1820000,
"bedroom": 3,
"construction_year": 1976,
"interior_sq_m": 130.43478393554688,
"property_id": "1114b8001b69a03a"
},
{
"address": "1143 Lake Bonavista Drive SE",
"assessment_value": 808500,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 140.3753204345703,
"property_id": "118be22fcc447295"
},
{
"address": "1332 Acadia Drive SE",
"assessment_value": 794000,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 114.92010498046876,
"property_id": "11a766087c862022"
},
{
"address": "432 Lake Bonavista Drive SE",
"assessment_value": 864000,
"bedroom": 3,
"construction_year": 1970,
"interior_sq_m": 140.3753204345703,
"property_id": "11bb8dd257169171"
},
{
"address": "552 Lake Newell Crescent SE",
"assessment_value": 827000,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 130.43478393554688,
"property_id": "11c595a833efc729"
},
{
"address": "100 739 Lake Bonavista Drive SE",
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 140.3753204345703,
"property_id": "11d5a036cedfafd6"
},
{
"address": "2135 Lake Bonavista Drive SE",
"assessment_value": 985000,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 140.3753204345703,
"property_id": "125121acac4a2919"
},
{
"address": "1119 Lake Sundance Crescent SE",
"assessment_value": 808500,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 142.0475616455078,
"property_id": "126be0b4209116ed"
},
{
"address": "31 Lake Bonaventure Place SE",
"assessment_value": 1340000,
"bedroom": 3,
"construction_year": 1977,
"interior_sq_m": 130.43478393554688,
"property_id": "12721a8d62691a"
},
{
"address": "1156 Lake Twintree Drive SE",
"assessment_value": 987000,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 132.0141143798828,
"property_id": "1284fb5ccd775cba"
},
{
"address": "236 Lake Acadia Gr SE",
"assessment_value": 875500,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "12bf1ac4b6ba3d73"
},
{
"address": "292 Lake Lucerne Way SE",
"assessment_value": 951500,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "12fe2fdb07bf6f3"
},
{
"address": "294 Lake Lucerne Way SE",
"assessment_value": 824000,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "12fff66e2b278e21"
},
{
"address": "35 Lake Bonaventure Place SE",
"assessment_value": 1180000,
"bedroom": 3,
"construction_year": 1977,
"interior_sq_m": 130.43478393554688,
"property_id": "130d09d6842101d5"
},
{
"address": "115 755 Lake Bonavista Drive SE",
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 140.3753204345703,
"property_id": "13207128e12953ab"
},
{
"address": "1160 Lake Bonavista Drive SE",
"assessment_value": 1100000,
"bedroom": 3,
"construction_year": 1970,
"interior_sq_m": 140.3753204345703,
"property_id": "1339ff3218b06e8d"
},
{
"address": "523 Lake Newell Crescent SE",
"assessment_value": 792500,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 130.43478393554688,
"property_id": "133f770ce4cc3665"
},
{
"address": "224 Lake Mead Road SE",
"assessment_value": 1370000,
"bedroom": 3,
"construction_year": 1974,
"interior_sq_m": 130.43478393554688,
"property_id": "134b2b686a809bbe"
},
{
"address": "851 Lake Twintree Crescent SE",
"assessment_value": 785000,
"bedroom": 2,
"construction_year": 1971,
"interior_sq_m": 130.20252990722656,
"property_id": "1359a3555f64fdde"
},
{
"address": "120 Lake Adams Gr SE",
"assessment_value": 942000,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 130.43478393554688,
"property_id": "135a1a277217606f"
},
{
"address": "1540 Lake Bonavista Drive SE",
"assessment_value": 808500,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 140.3753204345703,
"property_id": "138ef12d864cbc43"
},
{
"address": "56 Lake Wasa Gr SE",
"assessment_value": 926500,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 130.43478393554688,
"property_id": "13b2f7ebb7fb271d"
},
{
"address": "1024 Lake Christina Way SE",
"assessment_value": 849500,
"bedroom": 2,
"construction_year": 1970,
"interior_sq_m": 134.52247619628906,
"property_id": "13bef792a229f6ac"
},
{
"address": "732 Lake Lucerne Drive SE",
"assessment_value": 836500,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "13c8aeedd22d3a89"
},
{
"address": "664 Lake Moraine Way SE",
"assessment_value": 3330000,
"bedroom": 3,
"construction_year": 1973,
"interior_sq_m": 130.43478393554688,
"property_id": "1417e979230a8a0c"
},
{
"address": "1148 Lake Twintree Drive SE",
"assessment_value": 946500,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 132.0141143798828,
"property_id": "141b7f1830485e19"
},
{
"address": "12516 Lake Geneva Road SE",
"assessment_value": 839000,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 130.43478393554688,
"property_id": "142aa10e0289cd37"
},
{
"address": "640 Lake Bonavista Drive SE",
"assessment_value": 796500,
"bedroom": 3,
"construction_year": 1970,
"interior_sq_m": 140.3753204345703,
"property_id": "144870de5b42a384"
},
{
"address": "132 Lake Wood Place SE",
"assessment_value": 834500,
"bedroom": 3,
"construction_year": 1975,
"interior_sq_m": 130.43478393554688,
"property_id": "1453e8535a7ecdff"
},
{
"address": "1044 Lake Twintree Drive SE",
"assessment_value": 905000,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 132.0141143798828,
"property_id": "1456f6742d18af62"
},
{
"address": "13008 Lake Twintree Road SE",
"assessment_value": 864000,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 130.43478393554688,
"property_id": "146ebd64293fe0f3"
},
{
"address": "13223 Lake Crimson Drive SE",
"assessment_value": 878500,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 119.93682861328124,
"property_id": "1489257ace6cd97a"
},
{
"address": "144 Lake Acadia Place SE",
"assessment_value": 822000,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "1494b354806f38b2"
},
{
"address": "151 Lake Arrow Gr SE",
"assessment_value": 820000,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "14c223f314e26291"
},
{
"address": "1203 Lake Twintree Drive SE",
"assessment_value": 1580000,
"bedroom": 3,
"construction_year": 1971,
"interior_sq_m": 132.0141143798828,
"property_id": "14e556e52782a30a"
},
{
"address": "440 129 Avenue SE",
"assessment_value": 990000,
"bedroom": 3,
"construction_year": 1974,
"interior_sq_m": 130.43478393554688,
"property_id": "1507e641721013ab"
},
{
"address": "156 Lake Acadia Place SE",
"assessment_value": 813500,
"bedroom": 3,
"construction_year": 1972,
"interior_sq_m": 130.43478393554688,
"property_id": "15111292e994a3cd"
},
{
"address": "1112 Lake Christina Place SE",
"assessment_value": 798500,
"bedroom": 3,
"construction_year": 1970,
"interior_sq_m": 130.43478393554688,
"property_id": "1523c98a86646b9b"
}
],
"error": "",
"pagination": {
"current_page": 1,
"has_next_page": true,
"has_previous_page": false,
"page_total": 47
},
"price_quote": false,
"result_total": 2318,
"time_ms": 245,
"ui_info": {
"city": "Calgary",
"city_id": "6ec95b53075d062c",
"city_link": "ca/ab/calgary",
"city_slug": "calgary",
"community": "Lake Bonavista",
"community_id": "8481aec0d594c6d1",
"community_link": "ca/ab/calgary/lake-bonavista",
"community_slug": "lake_bonavista",
"country": "Canada",
"country_abbreviation": "CA",
"country_abbreviation_id": "9ace2b6431b7f1be",
"country_abbreviation_link": "ca",
"country_slug": "canada",
"province": "Alberta",
"province_abbreviation": "AB",
"province_abbreviation_id": "aae1f05a0f89d2c7",
"province_abbreviation_link": "ca/ab",
"province_slug": "alberta"
}
}
Divide each comparable's assessment_value by interior_sq_m for a per-square-metre figure. If your subject has the highest per-square-metre assessment among 10 similar properties, that's evidence.
Getting market value evidence with the automated valuation model (AVM)
For stronger cases, use the AVM endpoint. It returns a sale price estimate, a confidence score, up to 10 comparables, and a shareable HTML report URL you can hand to the appeal board:
API request
TypeScript code
const houski_data = async (): Promise<AvmResponse> => {
// You must copy the AvmResponse type declarations from the
// Houski API documentation to strongly type the response
const url = new URL('https://api.houski.ca/avm');
url.searchParams.set('api_key', 'YOUR_API_KEY');
url.searchParams.set('property_id', 'bd9c6fb24c31c772');
const response = await fetch(url);
const data = await response.json();
return data;
}
(async () => {
let data: AvmResponse = await houski_data();
// Log the response
console.log(data);
})();
API response
JSON
{
"cache_hit": true,
"cost_cents": 500.0,
"data": {
"address": "302 610 17 Avenue SW",
"bathroom_full": 1,
"bathroom_half": 1,
"bedroom": 2,
"city": "Calgary",
"comparable_properties": [
{
"address": "402 610 17 Avenue SW",
"distance_km": 0.0,
"estimate_sale_date_sold": "2025-02-07",
"image": "589c5b211ab31176_46d18d02",
"interior_sq_m": 91.88034057617188,
"latitude": 51.03819274902344,
"list_price": 295000,
"longitude": -114.07510375976562
},
{
"address": "101 523 15 Avenue SW",
"distance_km": 0.15573714673519137,
"estimate_sale_date_sold": "2023-08-29",
"image": "6d3f02fca68d547e_b6f2526e",
"interior_sq_m": 91.9732437133789,
"latitude": 51.0385856628418,
"list_price": 288888,
"longitude": -114.07293701171876
},
{
"address": "1105 1209 6 Street SW",
"distance_km": 0.39864420890808105,
"estimate_sale_date_sold": "2023-08-23",
"image": "59eb4d7ffd625770_807d4658",
"interior_sq_m": 92.99517059326172,
"latitude": 51.04155349731445,
"list_price": 299900,
"longitude": -114.07714080810548
},
{
"address": "109 545 18 Avenue SW",
"distance_km": 0.19652090966701508,
"estimate_sale_date_sold": "2025-09-03",
"image": "703794262c3f0a6f_ae0e2846",
"interior_sq_m": 94.10999298095705,
"latitude": 51.03668594360352,
"list_price": 319900,
"longitude": -114.0736083984375
},
{
"address": "401 1209 6 Street SW",
"distance_km": 0.39864420890808105,
"estimate_sale_date_sold": "2024-01-18",
"image": "add60c129cc174c8_15dc7a7e",
"interior_sq_m": 92.90226745605467,
"latitude": 51.04155349731445,
"list_price": 294000,
"longitude": -114.07714080810548
},
{
"address": "500 610 17 Avenue SW",
"distance_km": 0.0,
"estimate_sale_date_sold": "2023-05-17",
"image": "fb81bd27e5d3b319_860c3dd6",
"interior_sq_m": 93.36677551269533,
"latitude": 51.03819274902344,
"list_price": 324900,
"longitude": -114.07510375976562
},
{
"address": "701 1209 6 Street SW",
"distance_km": 0.39864420890808105,
"estimate_sale_date_sold": "2024-04-04",
"image": "27170c00d68d56c5_a08329a3",
"interior_sq_m": 94.48160552978516,
"latitude": 51.04155349731445,
"list_price": 314900,
"longitude": -114.07714080810548
},
{
"address": "504 616 15 Avenue SW",
"distance_km": 0.11205749213695526,
"estimate_sale_date_sold": "2025-07-04",
"image": "e731e220553c9548_88738769",
"interior_sq_m": 87.79264068603516,
"latitude": 51.03919219970703,
"list_price": 289900,
"longitude": -114.07533264160156
},
{
"address": "203 330 15 Avenue SW",
"distance_km": 0.35846400260925293,
"estimate_sale_date_sold": "2024-05-13",
"image": "9bfb40e46e0da97_57c6d01e",
"interior_sq_m": 90.20809936523438,
"latitude": 51.039058685302734,
"list_price": 318800,
"longitude": -114.07009887695312
},
{
"address": "305 1209 6 Street SW",
"distance_km": 0.39864420890808105,
"estimate_sale_date_sold": "2024-08-04",
"image": "1119eb5e5c0e6dd6_9dfcbaf5",
"interior_sq_m": 94.2957992553711,
"latitude": 51.04155349731445,
"list_price": 290000,
"longitude": -114.07714080810548
}
],
"comparable_properties_total": 26446,
"construction_year": 1979,
"country": "Canada",
"den": 0,
"estimate_list_price": {
"confidence_score": 95.37734985351562,
"model_metrics": {
"coefficient_of_variation": 21.297779888460052,
"error_10th_percentile": 3827.418701171875,
"error_25th_percentile": 9674.828125,
"error_50th_percentile": 23070.7421875,
"error_75th_percentile": 47898.9296875,
"error_90th_percentile": 92634.5625,
"error_95th_percentile": 148044.328125,
"forecast_std_dev": 128036.875,
"mae": 47591.03125,
"mape": 6.9191975593566895,
"mean_bias": -5065.5068359375,
"median_bias": 430.265625,
"median_mape": 4.622647285461426,
"mse": 16419014656.0,
"over_prediction_rate": 50.56352952509392,
"pct_error_10th": 0.825827956199646,
"pct_error_90th": 14.368406295776367,
"rmse": 128136.703125,
"testing_r_squared": 0.95,
"training_r_squared": 0.98,
"under_prediction_rate": 49.43647047490608,
"within_10_pct": 80.1416048550236,
"within_15_pct": 90.8823812734804,
"within_20_pct": 95.21722377420288,
"within_5_pct": 53.00067430883345
},
"value": 304696.46875
},
"estimate_rent_monthly": {
"confidence_score": 84.40579986572266,
"model_metrics": {
"coefficient_of_variation": 74.19626193400119,
"error_10th_percentile": 11197.140625,
"error_25th_percentile": 29858.390625,
"error_50th_percentile": 73107.78125,
"error_75th_percentile": 163402.125,
"error_90th_percentile": 341056.21875,
"error_95th_percentile": 550266.6875,
"forecast_std_dev": 451020.15625,
"mae": 168982.734375,
"mape": 33.335357666015625,
"mean_bias": -57108.90234375,
"median_bias": -1695.578125,
"median_mape": 15.594200134277344,
"mse": 206676312064.0,
"over_prediction_rate": 49.18625,
"pct_error_10th": 2.5083909034729004,
"pct_error_90th": 66.41152954101562,
"rmse": 454616.65625,
"testing_r_squared": 0.72,
"training_r_squared": 0.82,
"under_prediction_rate": 50.81375,
"within_10_pct": 36.0375,
"within_15_pct": 48.791250000000005,
"within_20_pct": 58.3375,
"within_5_pct": 19.635
},
"value": 2113.846923828125
},
"estimate_sale_price": {
"confidence_score": 95.3768310546875,
"model_metrics": {
"coefficient_of_variation": 21.802883473823258,
"error_10th_percentile": 3706.49365234375,
"error_25th_percentile": 9493.46875,
"error_50th_percentile": 22532.15625,
"error_75th_percentile": 47268.0703125,
"error_90th_percentile": 93783.46875,
"error_95th_percentile": 150844.203125,
"forecast_std_dev": 127978.265625,
"mae": 47541.25,
"mape": 7.054271221160889,
"mean_bias": -4664.0380859375,
"median_bias": 475.828125,
"median_mape": 4.623165130615234,
"mse": 16400123904.0,
"over_prediction_rate": 50.63577690010597,
"pct_error_10th": 0.8310901522636414,
"pct_error_90th": 14.612176895141602,
"rmse": 128062.96875,
"testing_r_squared": 0.95,
"training_r_squared": 0.99,
"under_prediction_rate": 49.36422309989404,
"within_10_pct": 79.77555148829593,
"within_15_pct": 90.50187843175031,
"within_20_pct": 94.70185916578365,
"within_5_pct": 53.04402273384067
},
"value": 293364.59375
},
"image": "bd9c6fb24c31c772_7e931788",
"interior_sq_m": 92.43848419189452,
"latitude": 51.03819274902344,
"longitude": -114.07510375976562,
"price_history": [
{
"date": "2025-02-18",
"estimate_list_price": 328939.625,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 303350.5625
},
{
"date": "2025-03-20",
"estimate_list_price": 329062.625,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 304171.25
},
{
"date": "2025-04-19",
"estimate_list_price": 329062.625,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 304964.21875
},
{
"date": "2025-05-19",
"estimate_list_price": 335027.4375,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 311037.21875
},
{
"date": "2025-06-18",
"estimate_list_price": 333825.6875,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 314355.09375
},
{
"date": "2025-07-18",
"estimate_list_price": 332129.96875,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 315810.03125
},
{
"date": "2025-08-17",
"estimate_list_price": 331247.09375,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 313273.1875
},
{
"date": "2025-09-16",
"estimate_list_price": 322242.5,
"estimate_rent_monthly": 2109.8994140625,
"estimate_sale_price": 307987.21875
},
{
"date": "2025-10-16",
"estimate_list_price": 310982.65625,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 304819.40625
},
{
"date": "2025-11-15",
"estimate_list_price": 310966.9375,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 309683.09375
},
{
"date": "2025-12-15",
"estimate_list_price": 310966.9375,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 308561.96875
},
{
"date": "2026-01-14",
"estimate_list_price": 303210.59375,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 304967.40625
},
{
"date": "2026-02-13",
"estimate_list_price": 302817.875,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 298701.09375
},
{
"date": "2026-03-15",
"estimate_list_price": 303162.3125,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 298037.53125
},
{
"date": "2026-04-14",
"estimate_list_price": 302872.15625,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 297308.53125
},
{
"date": "2026-05-14",
"estimate_list_price": 302872.15625,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 292016.375
},
{
"date": "2026-06-13",
"estimate_list_price": 302610.59375,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 292016.375
},
{
"date": "2026-07-13",
"estimate_list_price": 304696.46875,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 293364.59375
},
{
"date": "2026-08-12",
"estimate_list_price": 304696.46875,
"estimate_rent_monthly": 2113.846923828125,
"estimate_sale_price": 293364.59375
}
],
"property_id": "bd9c6fb24c31c772",
"property_type": "Apartment",
"property_warning_flags": [
{
"description": "Monthly fees run about 4% of the estimated value each year, above the typical range. High fees can weigh on resale.",
"warning": "High monthly fees"
},
{
"description": "This property appears to have been converted between residential and commercial use. Conversions can carry permit, zoning, and insurance complications worth confirming.",
"warning": "Use conversion"
}
],
"province": "Alberta",
"score_air_quality": 6,
"score_bicycle": 9,
"score_cell_coverage": 10,
"score_curb_appeal": 4,
"score_earthquake": 9,
"score_education": 9,
"score_entertainment": 10,
"score_family": 0,
"score_fire": 9,
"score_flood": 9,
"score_food_and_drink": 10,
"score_hurricane": 10,
"score_internet": 10,
"score_nature": 6,
"score_parking": 8,
"score_quiet": 2,
"score_retirement": 0,
"score_safety": 6,
"score_shopping": 9,
"score_smell": 4,
"score_tornado": 8,
"score_total": 7,
"score_total_percent": 0.6960000395774841,
"score_traffic": 0,
"score_transit": 9,
"score_walkability": 10,
"score_water_quality": 7,
"valuation_date": "2026-08-12"
},
"error": "",
"price_quote": false,
"time_ms": 656,
"url": "https://www.houski.ca/avm-report/bd9c6fb24c31c772_a49b86c7"
}
See the AVM documentation for the full response schema.
Screening at scale
Instead of waiting for clients, identify over-assessed properties proactively. Screen an entire community by pulling assessment and estimate fields together, then filter locally to rows where assessment is more than 15% above the estimate:
API request
TypeScript code
const houski_data = async (): Promise<PropertiesResponse> => {
// You must copy the PropertiesResponse type declarations from the
// Houski API documentation to strongly type the response
const url = new URL('https://api.houski.ca/properties');
url.searchParams.set('api_key', 'YOUR_API_KEY');
url.searchParams.set('city', 'calgary');
url.searchParams.set('community', 'lake bonavista');
url.searchParams.set('country_abbreviation', 'ca');
url.searchParams.set('property_type_eq', 'House');
url.searchParams.set('province_abbreviation', 'ab');
url.searchParams.set('results_per_page', '100');
url.searchParams.set('select', 'address,interior_sq_m,assessment_value,estimate_sale_price');
const response = await fetch(url);
const data = await response.json();
return data;
}
(async () => {
let data: PropertiesResponse = await houski_data();
// Log the response
console.log(data);
})();
API response
JSON
{
"cache_hit": false,
"cost_cents": 32.0,
"data": [
{
"address": "638 Lake Simcoe Close SE",
"assessment_value": 1370000,
"estimate_sale_price": 1452017,
"interior_sq_m": 195.0018615722656,
"property_id": "101f5dfb752a318b"
},
{
"address": "13039 Lake Twintree Road SE",
"assessment_value": 970000,
"estimate_sale_price": 1019028,
"interior_sq_m": 130.43478393554688,
"property_id": "1029fc3ea878f926"
},
{
"address": "1416 Acadia Drive SE",
"assessment_value": 729000,
"estimate_sale_price": 749259,
"interior_sq_m": 114.92010498046876,
"property_id": "103c69d8274b82b0"
},
{
"address": "127 Lake Tahoe Gr SE",
"assessment_value": 1350000,
"estimate_sale_price": 1332286,
"interior_sq_m": 130.43478393554688,
"property_id": "103db6085f778cc3"
},
{
"address": "720 120 Avenue SE",
"assessment_value": 834000,
"estimate_sale_price": 940342,
"interior_sq_m": 130.43478393554688,
"property_id": "104055f6488dc279"
},
{
"address": "31 Lake Sundance Place SE",
"assessment_value": 867000,
"estimate_sale_price": 1121565,
"interior_sq_m": 130.43478393554688,
"property_id": "1040c632b1abec70"
},
{
"address": "552 Lake Moraine Gr SE",
"assessment_value": 1780000,
"estimate_sale_price": 2028519,
"interior_sq_m": 130.43478393554688,
"property_id": "104556bb1afca481"
},
{
"address": "136 Lake Bonavista Drive SE",
"assessment_value": 831500,
"estimate_sale_price": 930338,
"interior_sq_m": 140.3753204345703,
"property_id": "104bc0e4cddf8a7"
},
{
"address": "1417 Lake Fraser Gr SE",
"assessment_value": 451500,
"estimate_sale_price": 495404,
"interior_sq_m": 130.43478393554688,
"property_id": "1057e4248661d8c0"
},
{
"address": "2228 Lake Bonavista Drive SE",
"assessment_value": 929000,
"estimate_sale_price": 947636,
"interior_sq_m": 140.3753204345703,
"property_id": "10827ef5495cc470"
},
{
"address": "1143 Lake Placid Drive SE",
"assessment_value": 1890000,
"estimate_sale_price": 2012813,
"interior_sq_m": 248.14195251464844,
"property_id": "1093a73271ed9006"
},
{
"address": "1123 120 Avenue SE",
"assessment_value": 862000,
"estimate_sale_price": 1147674,
"interior_sq_m": 130.43478393554688,
"property_id": "10ba5f046d976097"
},
{
"address": "12507 Lake Fraser Way SE",
"assessment_value": 954500,
"estimate_sale_price": 964842,
"interior_sq_m": 130.43478393554688,
"property_id": "10bf9020739d6c6f"
},
{
"address": "1445 Lake Ontario Drive SE",
"assessment_value": 718000,
"estimate_sale_price": 745271,
"interior_sq_m": 102.84281158447266,
"property_id": "10ce3e0352980c89"
},
{
"address": "403 Lake Topaz Crescent SE",
"assessment_value": 829500,
"estimate_sale_price": 921172,
"interior_sq_m": 145.2991485595703,
"property_id": "10d6820b617e3f4f"
},
{
"address": "623 Lake Moraine Way SE",
"assessment_value": 1750000,
"estimate_sale_price": 2083805,
"interior_sq_m": 130.43478393554688,
"property_id": "10d691a002801c73"
},
{
"address": "604 Lake Simcoe Close SE",
"assessment_value": 1120000,
"estimate_sale_price": 1197776,
"interior_sq_m": 195.0018615722656,
"property_id": "10e208e739d777ce"
},
{
"address": "103 Lake Lucerne Close SE",
"assessment_value": 818000,
"estimate_sale_price": 1075047,
"interior_sq_m": 137.72760009765625,
"property_id": "10f3c76293d8fc59"
},
{
"address": "40 Lake Wasa Gr SE",
"assessment_value": 903000,
"estimate_sale_price": 894765,
"interior_sq_m": 130.43478393554688,
"property_id": "1102f5250788c4c2"
},
{
"address": "428 135 Avenue SE",
"assessment_value": 1820000,
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{
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{
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{
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{
"address": "187 Lake Arrow Gr SE",
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"city": "Calgary",
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}
Run this across communities for a prospecting list of homeowners who might benefit from your services.
What the data does for you
The API screens thousands of properties in minutes instead of hours. You get assessment values, market estimates, and characteristics in one place.
You still bring the expertise: evaluating winnable cases, understanding local appeal processes, building the final case. The API handles data gathering so you focus on winning appeals.
Pricing
- Property lookups: Most fields cost a tenth of a cent per field per property
- AVM valuations: $5.00 per property (includes comparables and report)
At those rates, the four-field screen above costs a few dollars per 1,000 properties, so the $99 USD monthly minimum covers far more screening than a practice needs. If a month of screening identifies 50 viable cases at $500+ each in fees, the math works.
Getting started
- Sign up for API access
- Test with known cases - look up properties you've successfully appealed
- Screen a target area - find opportunities
- Build your outreach - contact homeowners with specific savings estimates
Check our API documentation or contact us for volume pricing.