Top-Rated Window Replacement Companies in Wareham, MA
Wareham's 6 listings below come from Google Maps rather than a state license file. IECC climate zone 5A sets the energy bar for a Wareham window job no matter which kind of list a contractor's name comes from. Checked September 2026.
Google Maps ratings checked · How we rank
5AIECC climate zone · ENERGY STAR Northern zone
What Wareham's climate means for your window spec
Boston-Cambridge-Newton, MA-NH piles up about 5,772 heating degree days in a normal year, against 608 on the cooling side of the ledger.
That's the load an ENERGY STAR-rated window in the Northern zone is built to handle.
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 1.9 mi away.
6 top-rated window replacement companies in and near Wareham
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 | Renewal by Andersen Window Replacement | 985 | Window installation service | Bourne 02532 | Google reviews | |
| 2 | Marios Roofing | 53 | Window installation service | East Wareham 02538 | Google reviews | |
| 3 | United Home Experts | 46 | Window installation service | Wareham 02571 | Google reviews | |
| 4 | Cran Marsh Inc | 45 | Window installation service | Middleborough 02346 | Google reviews | |
| 5 | Persson Construction, Inc. | 32 | Window installation service | Bourne 02532 | Google reviews | |
| 6 | Brocks Building | 25 | Window installation service | Wareham 02571 | 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?