Mahwah, NJ's Highest-Rated Window Installers on Google
Mahwah's 8 listings below come from Google Maps rather than a state license file. IECC climate zone 5A sets the energy bar for a Mahwah 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
Climate and energy performance in Mahwah
Mahwah sits in IECC climate zone 5A, the starting point for any code-minimum window performance here.
ENERGY STAR places Bergen County in its Northern zone for window certification.
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 4.5 mi away.
Google's top window installers serving Mahwah, NJ
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 | iHome Designs | 186 | Window installation service | Oakland 07436 | Google reviews | |
| 2 | Glass Doctor of Ramsey | 409 | Window installation service | Ramsey 07446 | Google reviews | |
| 3 | Wythe Windows | 31 | Window supplier | Ramsey 07446 | Google reviews | |
| 4 | Jamar Construction A Leader in Siding, Doors and Windows Solutions | 28 | Window supplier | Glen Rock 07452 | Google reviews | |
| 5 | GlassEnergy | 7 | Window installation service | Mahwah 07430 | Google reviews | |
| 6 | Lucid Windows & Doors | 12 | Window installation service | Upper Saddle River 07458 | Google reviews | |
| 7 | North Jersey Door Center | 25 | Window supplier | Ramsey 07446 | Google reviews | |
| 8 | C M Windows & Doors Inc. | 14 | Window supplier | Suffern 10901 | 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?