Contractors in Janesville, Wisconsin

3 listings: plumbers (1), hvac contractors (1), windows, siding & insulation (2).

How Do You Find a Licensed Contractor in Janesville, Wisconsin?

We list 3 contractors in Janesville, from open map data with no license check. Wisconsin regulates home improvement or residential work, but has no full general contractor license. Ask for the license number, confirm it with the state or city, and get at least two written bids.

Updated November 6, 2026 · Source: OpenStreetMap (downloaded November 6, 2026).

824 South Fremont Street, Janesville

Map listing: license not checkedWindows, Siding & Insulation

909 North Parker Drive, Janesville

Map listing: license not checkedWindows, Siding & Insulation
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Before You Hire in Janesville

Wisconsin regulates home improvement or residential work, but has no full general contractor license. Threshold: Based on permits and scope for one- and two-family homes. Read the Wisconsin license summary, then use the hiring checklist and compare your bids. Your city’s building department can also tell you which permits your job needs.

Other Cities in Wisconsin

Sources: Washington L&I, Oregon CCB and New York DOL open data; © OpenStreetMap contributors (ODbL) · Data last updated November 6, 2026 · Sources & method