Where the label reads the assessor's record
Everywhere, the label models a building from national data: a structure inventory and the census tract's year-built distribution. Where a county or state publishes its assessment roll, the label reads what the assessor observed instead — the actual year built, floor area and, in some places, stories, walls, foundation and condition. This page shows where that is true today.
59.3M
homes with an observed record source
41.2%
of all US housing units
27
assessor sources, queried live
311
counties, in 21 states and DC
Share of US homes
Each segment is one source, sized by the housing units in the counties it answers for. Hover a segment for its name.
Counties with an observed record source
Darker means more of the building comes from the record. Hover or tap a county for what its assessor supplies; hover a source in the chart below to find its counties.
Year built, floor area + structure (36.7 million homes)Year built + floor area (19.4 million homes)Year built (3.1 million homes)Modeled only
Every covered county is also listed, by source, under Counties covered.
Homes covered, by source
ACS housing units in each source's counties.
How coverage has grown
Homes reachable by an assessor source, by the date each one landed in the label.
What each source supplies
A field is only ever reported when the record unambiguously describes the home being scored — a tower's total floor area is never passed off as one condo's.
| Source | Year built | Floor area | Stories | Wall | Foundation | Condition |
|---|---|---|---|---|---|---|
| Florida (all 67 counties) | – | – | – | – | ||
| Texas (12 counties: Harris, Dallas, Tarrant, Bexar, Travis, Collin, Denton, Fort Bend, El Paso, Montgomery, Williamson, Cameron) | – | – | – | |||
| New Jersey (all 21 counties) | – | – | – | – | ||
| New York City (five boroughs) | – | – | ||||
| Los Angeles County, California | – | – | – | – | ||
| New York State (33 opt-in counties) | – | – | – | – | ||
| North Carolina (46 of 100 counties) | – | – | – | – | – | |
| Massachusetts (all 14 counties) | – | – | – | |||
| Maryland (all 24 jurisdictions) | – | – | ||||
| Cook County, Illinois | ||||||
| Ohio (9 counties) | – | |||||
| Southeast Michigan (7 counties, SEMCOG) | – | – | – | |||
| California (Riverside, Contra Costa and San Joaquin counties) | – | – | – | |||
| Connecticut (all 169 towns) | – | – | – | – | ||
| Twin Cities metro, Minnesota (7 counties) | – | – | ||||
| Utah (28 of 29 counties) | – | – | ||||
| Denver metro, Colorado (Denver, Jefferson, Adams, Douglas and Boulder counties) | – | – | ||||
| Georgia (Fulton, Clayton, Chatham and Forsyth counties) | – | – | – | |||
| Portland metro, Oregon (Multnomah, Washington and Clackamas counties) | – | – | – | – | ||
| Pennsylvania (Montgomery, York, Northampton and Cumberland counties) | – | – | ||||
| Philadelphia, Pennsylvania | – | |||||
| Allegheny County, Pennsylvania | ||||||
| San Francisco, California | – | – | – | |||
| Washington, DC | – | |||||
| Jackson County, Missouri (Kansas City) | – | – | – | |||
| Virginia (Chesterfield County and the City of Richmond) | – | – | ||||
| Vanderburgh County, Indiana (Evansville) | – | – |
Does the record make the label more accurate?
Measured where a benchmark exists: homes drawn at random, scored from the address alone, and compared with the assessor's record for that home. Cook County's and DC's references are built from the assessor's tables independently of the adapter; the others are the county's record as the adapter reads it at the parcel itself. Full methodology and caveats.
ModeledWith the assessor record
Year built within ±10 years
Building grade a reader sees is wrong
Is the right house found?
The dangerous failure is not a missing record but a neighbor's record shown as yours. Every source is checked end to end: homes drawn at random from the source itself, geocoded exactly as the label does, then looked up. When the address and the parcel do not agree, the label declines to guess and keeps its modeled value.
| Source | Homes sampled | Answered with an observed record | Wrong parcel | How |
|---|---|---|---|---|
| Florida (all 67 counties) | 169 | 64% | 0 | measured benchmark |
| Texas (12 counties: Harris, Dallas, Tarrant, Bexar, Travis, Collin, Denton, Fort Bend, El Paso, Montgomery, Williamson, Cameron) | 190 | 83% | 0 | measured benchmark |
| New Jersey (all 21 counties) | 181 | 75% | 0 | measured benchmark |
| New York City (five boroughs) | 198 | 96% | 0 | measured benchmark |
| Los Angeles County, California | 173 | 89% | 0 | measured benchmark |
| New York State (33 opt-in counties) | 131 | 67% | 0 | measured benchmark |
| North Carolina (46 of 100 counties) | 185 | 72% | 0 | measured benchmark |
| Massachusetts (all 14 counties) | 185 | 81% | 0 | measured benchmark |
| Maryland (all 24 jurisdictions) | 192 | 78% | 0 | measured benchmark |
| Cook County, Illinois | 297 | 77% | 0 | measured benchmark |
| Ohio (9 counties) | 188 | 84% | 0 | measured benchmark |
| Southeast Michigan (7 counties, SEMCOG) | 190 | 96% | 0 | measured benchmark |
| California (Riverside, Contra Costa and San Joaquin counties) | 182 | 90% | 0 | measured benchmark |
| Connecticut (all 169 towns) | 168 | 70% | 0 | measured benchmark |
| Twin Cities metro, Minnesota (7 counties) | 190 | 82% | 0 | measured benchmark |
| Utah (28 of 29 counties) | 164 | 75% | 0 | measured benchmark |
| Denver metro, Colorado (Denver, Jefferson, Adams, Douglas and Boulder counties) | 190 | 87% | 0 | measured benchmark |
| Georgia (Fulton, Clayton, Chatham and Forsyth counties) | 158 | 77% | 0 | measured benchmark |
| Portland metro, Oregon (Multnomah, Washington and Clackamas counties) | 179 | 85% | 0 | measured benchmark |
| Pennsylvania (Montgomery, York, Northampton and Cumberland counties) | 192 | 76% | 0 | measured benchmark |
| Philadelphia, Pennsylvania | 197 | 85% | 0 | measured benchmark |
| Allegheny County, Pennsylvania | 189 | 81% | 0 | measured benchmark |
| San Francisco, California | 184 | 98% | 0 | measured benchmark |
| Washington, DC | 195 | 84% | 0 | measured benchmark |
| Jackson County, Missouri (Kansas City) | 196 | 79% | 0 | measured benchmark |
| Virginia (Chesterfield County and the City of Richmond) | 190 | 82% | 0 | measured benchmark |
| Vanderburgh County, Indiana (Evansville) | 197 | 88% | 0 | measured benchmark |
Counties covered
The map's county detail as a list, with ACS housing units per county.
Florida (all 67 counties) · 67 counties
- Alachua, FL — 128,000 homes
- Baker, FL — 10,000 homes
- Bay, FL — 108,000 homes
- Bradford, FL — 11,000 homes
- Brevard, FL — 299,000 homes
- Broward, FL — 866,000 homes
- Calhoun, FL — 6,000 homes
- Charlotte, FL — 119,000 homes
- Citrus, FL — 85,000 homes
- Clay, FL — 89,000 homes
- Collier, FL — 239,000 homes
- Columbia, FL — 30,000 homes
- DeSoto, FL — 16,000 homes
- Dixie, FL — 9,000 homes
- Duval, FL — 455,000 homes
- Escambia, FL — 149,000 homes
- Flagler, FL — 61,000 homes
- Franklin, FL — 9,000 homes
- Gadsden, FL — 19,000 homes
- Gilchrist, FL — 8,000 homes
- Glades, FL — 7,000 homes
- Gulf, FL — 9,000 homes
- Hamilton, FL — 6,000 homes
- Hardee, FL — 10,000 homes
- Hendry, FL — 16,000 homes
- Hernando, FL — 93,000 homes
- Highlands, FL — 59,000 homes
- Hillsborough, FL — 631,000 homes
- Holmes, FL — 9,000 homes
- Indian River, FL — 86,000 homes
- Jackson, FL — 20,000 homes
- Jefferson, FL — 7,000 homes
- Lafayette, FL — 3,000 homes
- Lake, FL — 188,000 homes
- Lee, FL — 441,000 homes
- Leon, FL — 138,000 homes
- Levy, FL — 21,000 homes
- Liberty, FL — 3,000 homes
- Madison, FL — 8,000 homes
- Manatee, FL — 221,000 homes
- Marion, FL — 188,000 homes
- Martin, FL — 83,000 homes
- Miami-Dade, FL — 1.1 million homes
- Monroe, FL — 55,000 homes
- Nassau, FL — 45,000 homes
- Okaloosa, FL — 104,000 homes
- Okeechobee, FL — 19,000 homes
- Orange, FL — 587,000 homes
- Osceola, FL — 171,000 homes
- Palm Beach, FL — 719,000 homes
- Pasco, FL — 272,000 homes
- Pinellas, FL — 520,000 homes
- Polk, FL — 341,000 homes
- Putnam, FL — 37,000 homes
- Santa Rosa, FL — 80,000 homes
- Sarasota, FL — 266,000 homes
- Seminole, FL — 200,000 homes
- St. Johns, FL — 134,000 homes
- St. Lucie, FL — 160,000 homes
- Sumter, FL — 84,000 homes
- Suwannee, FL — 19,000 homes
- Taylor, FL — 11,000 homes
- Union, FL — 5,000 homes
- Volusia, FL — 282,000 homes
- Wakulla, FL — 15,000 homes
- Walton, FL — 61,000 homes
- Washington, FL — 11,000 homes
Texas (12 counties: Harris, Dallas, Tarrant, Bexar, Travis, Collin, Denton, Fort Bend, El Paso, Montgomery, Williamson, Cameron) · 12 counties
- Bexar, TX — 821,000 homes
- Cameron, TX — 160,000 homes
- Collin, TX — 437,000 homes
- Dallas, TX — 1.1 million homes
- Denton, TX — 377,000 homes
- El Paso, TX — 324,000 homes
- Fort Bend, TX — 306,000 homes
- Harris, TX — 1.9 million homes
- Montgomery, TX — 266,000 homes
- Tarrant, TX — 843,000 homes
- Travis, TX — 618,000 homes
- Williamson, TX — 263,000 homes
New Jersey (all 21 counties) · 21 counties
- Atlantic, NJ — 132,000 homes
- Bergen, NJ — 370,000 homes
- Burlington, NJ — 186,000 homes
- Camden, NJ — 214,000 homes
- Cape May, NJ — 100,000 homes
- Cumberland, NJ — 57,000 homes
- Essex, NJ — 337,000 homes
- Gloucester, NJ — 118,000 homes
- Hudson, NJ — 321,000 homes
- Hunterdon, NJ — 52,000 homes
- Mercer, NJ — 151,000 homes
- Middlesex, NJ — 318,000 homes
- Monmouth, NJ — 270,000 homes
- Morris, NJ — 200,000 homes
- Ocean, NJ — 296,000 homes
- Passaic, NJ — 186,000 homes
- Salem, NJ — 28,000 homes
- Somerset, NJ — 134,000 homes
- Sussex, NJ — 63,000 homes
- Union, NJ — 212,000 homes
- Warren, NJ — 47,000 homes
New York City (five boroughs) · 5 counties
- Bronx, NY — 559,000 homes
- Kings, NY — 1.1 million homes
- New York, NY — 923,000 homes
- Queens, NY — 910,000 homes
- Richmond, NY — 185,000 homes
Los Angeles County, California · 1 county
- Los Angeles, CA — 3.7 million homes
New York State (33 opt-in counties) · 33 counties
- Albany, NY — 148,000 homes
- Broome, NY — 93,000 homes
- Cayuga, NY — 37,000 homes
- Chautauqua, NY — 66,000 homes
- Cortland, NY — 21,000 homes
- Erie, NY — 441,000 homes
- Genesee, NY — 26,000 homes
- Greene, NY — 29,000 homes
- Hamilton, NY — 8,000 homes
- Lewis, NY — 16,000 homes
- Livingston, NY — 27,000 homes
- Montgomery, NY — 23,000 homes
- Oneida, NY — 105,000 homes
- Onondaga, NY — 212,000 homes
- Ontario, NY — 53,000 homes
- Orange, NY — 150,000 homes
- Oswego, NY — 55,000 homes
- Otsego, NY — 30,000 homes
- Putnam, NY — 38,000 homes
- Rensselaer, NY — 75,000 homes
- Rockland, NY — 109,000 homes
- Schuyler, NY — 10,000 homes
- St. Lawrence, NY — 52,000 homes
- Steuben, NY — 48,000 homes
- Suffolk, NY — 581,000 homes
- Sullivan, NY — 50,000 homes
- Tioga, NY — 22,000 homes
- Tompkins, NY — 48,000 homes
- Ulster, NY — 87,000 homes
- Warren, NY — 40,000 homes
- Wayne, NY — 43,000 homes
- Westchester, NY — 394,000 homes
- Wyoming, NY — 18,000 homes
North Carolina (46 of 100 counties) · 46 counties
- Alamance, NC — 77,000 homes
- Avery, NC — 14,000 homes
- Beaufort, NC — 25,000 homes
- Brunswick, NC — 99,000 homes
- Burke, NC — 40,000 homes
- Carteret, NC — 52,000 homes
- Catawba, NC — 73,000 homes
- Columbus, NC — 24,000 homes
- Cumberland, NC — 144,000 homes
- Currituck, NC — 17,000 homes
- Dare, NC — 35,000 homes
- Duplin, NC — 24,000 homes
- Gaston, NC — 102,000 homes
- Graham, NC — 5,000 homes
- Guilford, NC — 238,000 homes
- Halifax, NC — 25,000 homes
- Harnett, NC — 55,000 homes
- Haywood, NC — 36,000 homes
- Henderson, NC — 58,000 homes
- Iredell, NC — 84,000 homes
- Johnston, NC — 91,000 homes
- Lee, NC — 27,000 homes
- Lenoir, NC — 27,000 homes
- Mecklenburg, NC — 503,000 homes
- Montgomery, NC — 15,000 homes
- Moore, NC — 50,000 homes
- Nash, NC — 44,000 homes
- Northampton, NC — 11,000 homes
- Onslow, NC — 87,000 homes
- Person, NC — 19,000 homes
- Pitt, NC — 83,000 homes
- Randolph, NC — 63,000 homes
- Rockingham, NC — 44,000 homes
- Sampson, NC — 26,000 homes
- Stanly, NC — 29,000 homes
- Transylvania, NC — 19,000 homes
- Tyrrell, NC — 2,000 homes
- Union, NC — 89,000 homes
- Vance, NC — 19,000 homes
- Wake, NC — 496,000 homes
- Washington, NC — 6,000 homes
- Watauga, NC — 33,000 homes
- Wayne, NC — 54,000 homes
- Wilkes, NC — 32,000 homes
- Wilson, NC — 37,000 homes
- Yadkin, NC — 17,000 homes
Massachusetts (all 14 counties) · 14 counties
- Barnstable, MA — 166,000 homes
- Berkshire, MA — 70,000 homes
- Bristol, MA — 245,000 homes
- Dukes, MA — 18,000 homes
- Essex, MA — 330,000 homes
- Franklin, MA — 35,000 homes
- Hampden, MA — 198,000 homes
- Hampshire, MA — 67,000 homes
- Middlesex, MA — 664,000 homes
- Nantucket, MA — 13,000 homes
- Norfolk, MA — 295,000 homes
- Plymouth, MA — 218,000 homes
- Suffolk, MA — 357,000 homes
- Worcester, MA — 355,000 homes
Maryland (all 24 jurisdictions) · 24 counties
- Allegany, MD — 33,000 homes
- Anne Arundel, MD — 236,000 homes
- Baltimore, MD — 295,000 homes
- Baltimore, MD — 351,000 homes
- Calvert, MD — 36,000 homes
- Caroline, MD — 14,000 homes
- Carroll, MD — 67,000 homes
- Cecil, MD — 44,000 homes
- Charles, MD — 64,000 homes
- Dorchester, MD — 16,000 homes
- Frederick, MD — 109,000 homes
- Garrett, MD — 19,000 homes
- Harford, MD — 105,000 homes
- Howard, MD — 125,000 homes
- Kent, MD — 10,000 homes
- Montgomery, MD — 407,000 homes
- Prince George's, MD — 366,000 homes
- Queen Anne's, MD — 22,000 homes
- Somerset, MD — 11,000 homes
- St. Mary's, MD — 46,000 homes
- Talbot, MD — 20,000 homes
- Washington, MD — 64,000 homes
- Wicomico, MD — 44,000 homes
- Worcester, MD — 57,000 homes
Cook County, Illinois · 1 county
- Cook, IL — 2.3 million homes
Ohio (9 counties) · 9 counties
- Butler, OH — 155,000 homes
- Cuyahoga, OH — 615,000 homes
- Delaware, OH — 86,000 homes
- Fairfield, OH — 64,000 homes
- Franklin, OH — 595,000 homes
- Licking, OH — 73,000 homes
- Lorain, OH — 137,000 homes
- Montgomery, OH — 253,000 homes
- Summit, OH — 248,000 homes
Southeast Michigan (7 counties, SEMCOG) · 7 counties
- Livingston, MI — 80,000 homes
- Macomb, MI — 373,000 homes
- Monroe, MI — 67,000 homes
- Oakland, MI — 561,000 homes
- St. Clair, MI — 73,000 homes
- Washtenaw, MI — 160,000 homes
- Wayne, MI — 801,000 homes
California (Riverside, Contra Costa and San Joaquin counties) · 3 counties
- Contra Costa, CA — 429,000 homes
- Riverside, CA — 869,000 homes
- San Joaquin, CA — 260,000 homes
Connecticut (all 169 towns) · 9 planning regions
- Capitol Planning Region, CT — 417,000 homes
- Greater Bridgeport Planning Region, CT — 126,000 homes
- Lower Connecticut River Valley Planning Region, CT — 83,000 homes
- Naugatuck Valley Planning Region, CT — 193,000 homes
- Northeastern Connecticut Planning Region, CT — 42,000 homes
- Northwest Hills Planning Region, CT — 56,000 homes
- South Central Connecticut Planning Region, CT — 248,000 homes
- Southeastern Connecticut Planning Region, CT — 126,000 homes
- Western Connecticut Planning Region, CT — 252,000 homes
Twin Cities metro, Minnesota (7 counties) · 7 counties
- Anoka, MN — 142,000 homes
- Carver, MN — 42,000 homes
- Dakota, MN — 179,000 homes
- Hennepin, MN — 572,000 homes
- Ramsey, MN — 234,000 homes
- Scott, MN — 57,000 homes
- Washington, MN — 109,000 homes
Utah (28 of 29 counties) · 28 counties
- Beaver, UT — 3,000 homes
- Box Elder, UT — 21,000 homes
- Cache, UT — 47,000 homes
- Carbon, UT — 10,000 homes
- Daggett, UT — 1,000 homes
- Davis, UT — 121,000 homes
- Duchesne, UT — 9,000 homes
- Emery, UT — 4,000 homes
- Garfield, UT — 4,000 homes
- Grand, UT — 5,000 homes
- Iron, UT — 24,000 homes
- Kane, UT — 6,000 homes
- Millard, UT — 5,000 homes
- Morgan, UT — 4,000 homes
- Piute, UT — 1,000 homes
- Rich, UT — 3,000 homes
- Salt Lake, UT — 450,000 homes
- San Juan, UT — 6,000 homes
- Sanpete, UT — 11,000 homes
- Sevier, UT — 9,000 homes
- Summit, UT — 27,000 homes
- Tooele, UT — 25,000 homes
- Uintah, UT — 14,000 homes
- Utah, UT — 211,000 homes
- Wasatch, UT — 16,000 homes
- Washington, UT — 82,000 homes
- Wayne, UT — 2,000 homes
- Weber, UT — 101,000 homes
Denver metro, Colorado (Denver, Jefferson, Adams, Douglas and Boulder counties) · 5 counties
- Adams, CO — 196,000 homes
- Boulder, CO — 145,000 homes
- Denver, CO — 360,000 homes
- Douglas, CO — 144,000 homes
- Jefferson, CO — 254,000 homes
Georgia (Fulton, Clayton, Chatham and Forsyth counties) · 4 counties
- Chatham, GA — 138,000 homes
- Clayton, GA — 115,000 homes
- Forsyth, GA — 93,000 homes
- Fulton, GA — 507,000 homes
Portland metro, Oregon (Multnomah, Washington and Clackamas counties) · 3 counties
- Clackamas, OR — 174,000 homes
- Multnomah, OR — 371,000 homes
- Washington, OR — 243,000 homes
Pennsylvania (Montgomery, York, Northampton and Cumberland counties) · 4 counties
- Cumberland, PA — 111,000 homes
- Montgomery, PA — 350,000 homes
- Northampton, PA — 129,000 homes
- York, PA — 190,000 homes
Philadelphia, Pennsylvania · 1 county
- Philadelphia, PA — 748,000 homes
Allegheny County, Pennsylvania · 1 county
- Allegheny, PA — 607,000 homes
San Francisco, California · 1 county
- San Francisco, CA — 415,000 homes
Washington, DC · 1 county
- District of Columbia, DC — 361,000 homes
Jackson County, Missouri (Kansas City) · 1 county
- Jackson, MO — 336,000 homes
Virginia (Chesterfield County and the City of Richmond) · 2 counties
- Chesterfield, VA — 146,000 homes
- Richmond, VA — 114,000 homes
Vanderburgh County, Indiana (Evansville) · 1 county
- Vanderburgh, IN — 85,000 homes
What this page does and does not say
- A source is not a guarantee. Inside a covered county the label still falls back to its modeled values when the address cannot be matched to exactly one parcel, when the record omits a field, or when the assessor's service is slow. The "answered" rates above are the realistic share.
- Serving is not measuring. Only the jurisdictions on the accuracy page carry measured accuracy figures. The others carry a verification run that checks the right parcel is found, which is a narrower claim.
- Homes are ACS housing units in each source's counties, the same table the label uses for its year-built fallback. Some sources do not answer for every home in those counties (New York State's public layer, for instance, covers only the counties that opted in, and it is mapped that way).
- Nothing is bundled. Every record is queried live from the publisher and cached briefly; owner names, mailing addresses and sale prices are never requested.
- What you enter on the label always wins over the assessor, and the assessor wins over the model.
Informational purposes only. This label is a modeled estimate built from public data. It is not an inspection, appraisal, survey, or insurance quote, and it is not legal, financial, insurance, engineering, or real estate advice. It describes what the model expects of a home like this one at this location; it cannot tell you the condition, safety, value, or insurability of any particular property. Verify anything you would act on with a qualified professional. Provided as is, without warranty.
Generated from the adapter registry; newest source added 2026-10-04. Regenerate with python scripts/build_coverage.py --write. County boundaries: US Census Bureau cartographic boundary files via us-atlas.