Google's Top-Rated Window Pros Near Portsmouth, NH
We don't have license data for window and glazing businesses in Portsmouth, NH the way we do for some other cities on this site. This page leans on Google Maps instead: 6 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 Portsmouth's climate means for your window spec
IECC rates Portsmouth's climate zone as 5A, the starting point for any code-minimum window performance here.
ENERGY STAR places Rockingham County in its Northern zone for window certification.
Normal temperatures run 24°F in January and 70°F in July, so the glass package worth paying for in Portsmouth isn't the same one that pencils out two zones over.
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 3.6 mi away.
6 top-rated window replacement companies in and near Portsmouth
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 | James & Whitney Co. | 109 | Window installation service | Portsmouth 03801 | Google reviews | |
| 2 | Best Choice Windows & Doors | 40 | Window installation service | North Hampton 03862 | Google reviews | |
| 3 | Pella Windows and Doors Showroom of Newington, NH | 175 | Window installation service | Newington 03801 | Google reviews | |
| 4 | Portland Glass of Portsmouth | 166 | Window installation service | Portsmouth 03801 | Google reviews | |
| 5 | United Home Experts | 81 | Window installation service | Portsmouth 03801 | Google reviews | |
| 6 | Nick's Door And Window | 10 | Window installation service | Portsmouth 03801 | 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?