Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. Every office link was opened and checked against the office's own site between September 23, 2026 and September 24, 2026.
Rock County, Wisconsin, has about 165,000 residents (2024 Census Bureau estimate). The title to a parcel in Rock County is in the deed records of the Register of Deeds and its taxable value is set by the town assessor; what is built on it is a matter for the city or the county. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, city permits, evictions and court cases, records requests and common questions.
Related guides: Rock County public records, Rock County arrest records, Rock County warrants, Rock County inmate search, Rock County criminal records, Wisconsin arrest records and Wisconsin inmate search.
Deeds, Mortgages and Liens in Rock County
Deeds, mortgages, liens and easements that affect title to land in Rock County are recorded by the Register of Deeds, which indexes them by name and sells copies.
SearchSystems opened and checked the Register of Deeds' page at co.rock.wi.us/departments/register-of-deeds/real-estate/online-search (page title: Online Search | Rock County, WI), which answered when SearchSystems opened it on September 24, 2026.
Assessed Values and the Tax Roll in Rock County
The value each parcel in Rock County is taxed on is set locally, by the assessor of each city, town and village, not by the county. Wisconsin property is assessed by each city, town and village, and the state equalizes the values across municipalities.
The county property tax office's page SearchSystems verified is at co.rock.wi.us/departments/treasurer/tax-database-search (page title: Tax Database Search | Rock County, WI), which answered when SearchSystems opened it on September 23, 2026.
Permits and City Records in the Cities of Rock County
Building permits, zoning and code cases inside a city are the city's own records. The cities in Rock County with a SearchSystems guide to their offices, with the city page SearchSystems verified:
- Janesville: the city hall page SearchSystems verified is at janesvillewi.gov/about-janesville/contact-us/facility-directory (verified September 25, 2026).
- Beloit: the city hall page SearchSystems verified is at beloitwi.gov/index.asp (verified September 25, 2026).
- Edgerton: the city hall page SearchSystems verified is at edgerton.wi.gov (verified September 26, 2026).
- Evansville: the city hall page SearchSystems verified is at evansvillewi.gov/city_government/contact_the_city, phone 608-882-2266 (verified September 26, 2026).
- Milton: the city hall page SearchSystems verified is at milton-wi.gov/m/directory/department?did=12, phone (608) 868-6900 (verified September 26, 2026).
Evictions and Court Cases About Land in Rock County
Court cases about land from Rock County, evictions among them, are filed in the Rock County Circuit Court.
The court records page SearchSystems verified for the county is at co.rock.wi.us/departments/circuit-court, phone 608-757-5785.
Asking a County Office for a Record
Under the Wisconsin Public Records Law a county office must answer a request as soon as practicable and without delay; the law sets no number of days, and it may charge the actual cost of copying and locating, with no charge for the first $50 of locating. The county records request page SearchSystems verified is at co.rock.wi.us/departments/county-clerk/public-records-request (page title: Public Records Requests | Rock County, WI).
Frequently Asked Questions
Who records deeds in Rock County?
The Register of Deeds, at co.rock.wi.us. Deeds, mortgages and liens on land in Rock County are filed there.
Who sets the assessed value of a property in Rock County?
The assessor of each city, town and village.
Where are evictions from Rock County filed?
In the Rock County Circuit Court. The file is public unless the court seals it.
How is property assessed in Wisconsin?
Wisconsin property is assessed by each city, town and village, and the state equalizes the values across municipalities.
Is this the official Rock County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.