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 25, 2026.
Janesville, Wisconsin, in Rock County, has about 66,000 residents (2024 Census Bureau estimate). The title to a parcel in Janesville 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. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, city permits and records, evictions and court cases, records requests and common questions.
Related guides: Janesville public records, Rock County property records, Janesville arrest records, Janesville warrants, Janesville inmate search, Janesville criminal records, Wisconsin arrest records and Wisconsin inmate search.
Deeds, Mortgages and Liens in Janesville
Who owns a parcel in Janesville and what it sold for are in the deed records of the Register of Deeds, with every lien or mortgage against the land.
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 Janesville
The value each parcel in Janesville 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 Janesville
Building permits, zoning and code cases are the city's own. For Janesville, SearchSystems opened and checked the city hall page at janesvillewi.gov/about-janesville/contact-us/facility-directory (page title: Buildings, Departments and Divisions Directory | Janesville, WI), Fridays Fire Department 303 Milton Avenue 8 a.m. - 4:30 p.m., which answered when SearchSystems opened it on September 25, 2026.
The city clerk's page SearchSystems verified is at janesvillewi.gov/departments-services/clerk-treasurer-s-office/open... (page title: Open Records Requests | Janesville, WI), phone (608) 755-3070, which answered when SearchSystems opened it on September 25, 2026.
Evictions and Court Cases About Land in Janesville
An eviction, a foreclosure, a lien dispute or a quiet title suit is a court case in the Rock County Circuit Court, and the file is public unless sealed.
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 Janesville?
The Register of Deeds, at co.rock.wi.us. Deeds, mortgages and liens on land in Janesville are filed there.
Who sets the assessed value of a property in Janesville?
The assessor of each city, town and village.
Where are evictions from Janesville 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 Janesville website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.