Google's Top-Rated Window Pros Near Janesville, WI
We don't have license data for window and glazing businesses in Janesville, WI the way we do for some other cities on this site. This page leans on Google Maps instead: 10 businesses, ranked by rating weighted against how many people reviewed them. A strong Google rating still isn't the same thing as a license on file, so ask to see one before you sign anything.
Google Maps ratings checked · How we rank
5AIECC climate zone · ENERGY STAR Northern zone
What Janesville's climate means for your window spec
Rock County sees about 37.4 inches of precipitation and 36.6 inches of snow in a normal year.
Weather at that level is one more reason the flashing and sill pan under a Janesville window matter as much as the glass sitting in it.
So ask any Janesville contractor how they handle both, not just which brand they carry.
Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 4.2 mi away.
10 top-rated window replacement companies in and near Janesville
Ranked by Google rating weighted against how many people left one, so a perfect score from a handful of reviewers never outranks a strong average built on hundreds. That ranking is not a license check; call the state directly and ask for the contractor's license or registration number.
| Rank | Business | Google rating | Reviews | Category | Area | Google Maps listing |
|---|---|---|---|---|---|---|
| 1 | Wilco Exteriors | 87 | Window installation service | Janesville 53546 | Google reviews | |
| 2 | Renewal by Andersen of Janesville | 32 | Window installation service | Janesville 53545 | Google reviews | |
| 3 | ABC Seamless of Janesville Inc | 57 | Window installation service | Janesville 53546 | Google reviews | |
| 4 | Elite Auto Glass - Janesville | 183 | Window installation service | Janesville 53546 | Google reviews | |
| 5 | H & H Exteriors Inc | 27 | Window installation service | Janesville 53546 | Google reviews | |
| 6 | City Glass Company, Inc. | 54 | Window installation service | Janesville 53546 | Google reviews | |
| 7 | Infinity Exteriors | 28 | Window installation service | Janesville 53545 | Google reviews | |
| 8 | Rock River Roofing & Exteriors | 9 | Window installation service | Janesville 53545 | Google reviews | |
| 9 | Bob’s Custom Windows & Siding, Inc. | 37 | Window installation service | Janesville 53545 | Google reviews | |
| 10 | Budget home improvement | 11 | Window installation service | Janesville 53546 | Google reviews |
Questions to ask before you sign
- How long have you held your state license, and can I see the number?
- Is this a full-frame replacement or an insert into my existing frame, and why that one?
- Who pulls the permit, and does this change trigger an egress check on a bedroom window?
- What flashing and sill pan will you use, and in what order do you install them?
- If my home was built before 1978, is your crew lead-safe certified for this job?
- What's the completion date in writing, and what happens if the schedule slips?