Grant County Wisconsin Property Appraiser, Search Your Record Lookup
Grant County is Wisconsin's most southwestern county — bordered by the Mississippi River to the west, Iowa to the southwest, and Illinois to the south. Home to Platteville, the county seat of one of America's most historically significant lead mining districts, Grant County maintains 48,669 parcels across 1,147 square miles of Driftless Area terrain. Search ownership records, assessed values, and parcel details free — no login needed.
Wisconsin Property Search
Grant County, Wisconsin maintains detailed parcel and assessment data through the County Appraiser’s office for public access and research. The county currently manages 48,669 parcels and 53,182 matched buildings, supported by aerial imagery collected between 2019 and 2022. Address databases were recently refreshed, identifying 31,165 secondary property addresses. In addition, standardized zoning classifications now cover 23,951 parcels, improving property valuation accuracy, land-use planning, and reliable tax roll records across Grant County.
Grant County, Wisconsin Property Overview – 2026
Grant County includes 15,686 residential properties and 2,191 commercial properties. During 2026, there have been 74 residential sales recorded. Around 1.76% of homes are seriously underwater, while the effective property tax rate is 1.17% across the county
Residential Properties
15,686
Commercial Properties
Avg. Home Age Single Family
Avg. Square Feet Single Family
Residential Sales 2026
Homes Seriously Underwater
1.76%
Residential Sales past year
621
Rich Homes percentage
30.77%
Effective 2026 Property Tax
1.17%
Total Foreclosure Filings 2025
1
Near By Counties
Grant County — Wisconsin's Historic Lead Mining District
Before Wisconsin was a state, Grant County was already producing wealth. The Upper Mississippi Valley lead mining district centered on Platteville peaked at over 40,000 tons of lead per year by the 1840s — making it one of the largest lead producing regions in the world at the time. Platteville alone has 1,079 documented historic mine sites within its boundaries. That underground legacy matters for property buyers today: any parcel in the historic mining district — particularly in Platteville, Cuba City, Livingston, and Hazel Green — may have subsurface mining entries, shafts, or voids that affect land stability and buildability. Grant County's terrain is pure Driftless Area — rolling limestone bluffs carved by the Wisconsin, Grant, and Mississippi Rivers — and its 1.17% effective tax rate stays below the state average on a median home value of approximately $157,000, one of southern Wisconsin's most affordable markets.
Grant County Property — Key Stats 2026
Top Cities in Grant County Wisconsin
The most active cities in Grant County include Platteville, Lancaster, and Boscobel. These locations serve as the county’s main residential, agricultural, and commercial centers. Their communities contain a mix of established neighborhoods, rural land parcels, and developing property areas that significantly influence zoning records, property values, and county assessment data managed by the Grant County Appraiser’s office
Platteville
6,240 Parcels
Lancaster
4,185 Parcels
Boscobel
3,512 Parcels
View Grant County Parcel Map — Official GIS
Search property boundaries, ownership data, and assessment records on Grant County's official Southwest Wisconsin GIS viewer
Open Grant County GIS Map →Also: Wisconsin Statewide Parcel Map (all 72 counties)
Helpful for Grant County Property Research
Grant County WI Property Search Tool Has 4 Best Methods
Our Grant County Wisconsin Property Search Tool allows users to quickly locate parcel information online without cost. Search using the owner name, parcel identification number (PIN), property address, or city name. With only a few clicks you can review ownership information, tax data, sales records, and complete parcel details.
Search By Owner Name
Use the property owner’s name to locate Grant County Wisconsin property ownership records quickly.
Search By Address
Search Grant County Wisconsin property details by entering the full property address online.
Search By Parcel PIN
Enter the parcel identification number for an exact Grant County Wisconsin property record search.
Search By City Name
If other details unavailable, search Grant County Wisconsin properties using the city name field.
Grant County WI Property Search Tool Provides Information
Our Grant County Wisconsin Property Search Tool offers detailed property information with every lookup. Search using the owner name, parcel number, or address to view ownership records, tax assessments, land values, parcel identifiers, and official Grant County property data used for real estate research and investment decisions.
Parcel Number
Primary owner listed in Grant County Wisconsin property records for accurate ownership verification and parcel research.
Owner Name
Secondary owner recorded in Grant County Wisconsin property data helping identify co-owners and shared property responsibility.
Site Address
Physical property location used in Grant County Wisconsin records for mapping, navigation, and parcel identification.
Postal Address
Mailing address used by Grant County Wisconsin authorities to deliver tax bills and official property notices.
PI Number
Unique parcel number assigned within Grant County Wisconsin for property tracking, mapping systems, and legal documentation.
Tax Parcel Id
Grant County Wisconsin tax parcel identifier connecting properties to tax rolls, payments, and assessment records.
State Id
Wisconsin state-level identifier supporting standardized Grant County Wisconsin property tracking and data consistency statewide.
Zip Code
Postal ZIP code used to identify Grant County Wisconsin property location for mapping, research, and demographics.
Place Name
City or community name indicating where the Grant County Wisconsin property is geographically located.
School District
Assigned school district affecting Grant County Wisconsin property taxes, home values, and local education boundaries.
Assessed Value
Grant County Wisconsin assessed property value used for taxation, market analysis, and property comparison.
Land Value
Assessed value of land only in Grant County Wisconsin property records excluding improvements or buildings.
Improvement Value
Grant County Wisconsin value assigned to buildings or structures used for property assessment and taxation.
Fair Market Value
Estimated Grant County Wisconsin property market value used by buyers, sellers, and investors.
Property Tax Amount
Total Grant County Wisconsin property tax amount calculated before deductions or exemptions applied.
Gross Property Tax
Grant County Wisconsin classification identifying property type including residential, commercial, agricultural, or other uses.
Property Class
Grant County Wisconsin classification identifying property type including residential, commercial, agricultural, or other uses.
Assessed Acres
Acreage measured for Grant County Wisconsin assessment purposes determining land value and taxation.
Deeded Acres
Legal acreage recorded in Grant County Wisconsin deeds confirming official property ownership boundaries.
GIS Acres
GIS-calculated acreage used by Grant County Wisconsin mapping systems for accurate parcel measurement.
$108,800
FAQs
How can I search property records in Grant County Wisconsin?
You can search Grant County Wisconsin property records using owner name, parcel number, address, or city.
How many parcels are recorded in Grant County Wisconsin?
Grant County Wisconsin currently maintains approximately 48,669 property parcels in its property database.
What information does the Grant County Wisconsin property search provide?
It provides ownership details, tax records, parcel numbers, land values, and property assessment information.
Can I find property tax details for Grant County Wisconsin online?
Yes, property tax amounts and assessment details for Grant County Wisconsin can be viewed through the search tool.
What is the effective property tax rate in Grant County Wisconsin?
The effective property tax rate in Grant County Wisconsin is approximately 1.17%.