United States, property records
Wisconsin property data
2,181,208 residential parcels in Wisconsin on our national assessor and recorder file, with owner, mailing address, structure characteristics, values, sales and liens keyed to the parcel. Fill rates below are measured on the 09/01/2026 snapshot, residential parcels as the denominator.
Field fill rates in Wisconsin
The share of residential parcels in Wisconsin on which each field is populated. Owner name, mailing address, lot size, assessed value and coordinates are filled on effectively every parcel nationally and are omitted. The structure fields are the ones that vary, because they come from county field cards that not every county publishes.
| Field | Wisconsin | National |
|---|---|---|
| Year built | 39.6% | 90.7% |
| Living area | 37.5% | 90.0% |
| Bedrooms | 99.1% | 98.8% |
| Bathrooms | 83.4% | 89.7% |
| Stories | 37.9% | 80.9% |
| Heating | 32.4% | 74.2% |
| Air conditioning | 26.8% | 63.0% |
| Garage | 31.9% | 62.1% |
| Exterior walls | 33.3% | 64.0% |
| Building condition | 18.3% | 56.1% |
| Building quality | 14.4% | 53.6% |
| Roof cover | 13.1% | 55.0% |
| Construction type | 3.9% | 47.5% |
| Roof type | 0.7% | 37.3% |
| Current valuation | 96.4% | 96.5% |
| Assessed value | 99.0% | 98.8% |
| Pool (reporting rate) | 1.9% | 7.7% |
Denominator: parcels with a residential land use code. Fill rates on all parcels, including vacant land and commercial, are lower; on parcels with a building they are higher and the denominator varies by state. We use residential throughout so states compare.
What the Wisconsin file is used for
- Loading the state into a warehouse or product under a bulk license
- Owner and mailing-address appends for Wisconsin addresses
- Insurance underwriting inputs where the structure fields are filled, with the roof field supplemented from permit history because Wisconsin counties publish it on only 13.1% of parcels
- Purchase, refinance and new-homeowner triggers from the recorder side of the file
Wisconsin counties publish very few roof and construction codes. Year built and living area are partly covered, and roof age for Wisconsin is best taken from permit history where a roofing permit exists.