Google's Top-Rated Window Pros Near East Northport, NY
East Northport's 9 listings below come from Google Maps rather than a state license file. IECC climate zone 4A sets the energy bar for a East Northport window job no matter which kind of list a contractor's name comes from. Checked September 2026.
Google Maps ratings checked · How we rank
4AIECC climate zone · ENERGY STAR North-Central zone
What East Northport's climate means for your window spec
New York-Newark-Jersey City, NY-NJ piles up about 5,218 heating degree days in a normal year, against 855 on the cooling side of the ledger.
That's the load an ENERGY STAR-rated window in the North-Central 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 2.6 mi away.
9 top-rated window replacement companies in and near East Northport
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 | GNP Roofing & Siding | 153 | Window installation service | Huntington 11743 | Google reviews | |
| 2 | Royal Windows and Doors | 55 | Window installation service | Commack 11725 | Google reviews | |
| 3 | Alpha Windows & Siding | 17 | Window installation service | Commack 11725 | Google reviews | |
| 4 | East Northport Windows | 14 | Window installation service | East Northport 11731 | Google reviews | |
| 5 | A P Siding & Window | 9 | Window installation service | East Northport 11731 | Google reviews | |
| 6 | Best Enterprises General Contracting | 46 | Window installation service | East Northport 11731 | Google reviews | |
| 7 | Long Island Window & Door Ltd | 14 | Window supplier | Commack 11725 | Google reviews | |
| 8 | WindowRama | 54 | Window installation service | Commack 11725 | Google reviews | |
| 9 | Sears Window Replacement | 11 | Window installation service | East Northport 11731 | 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?