Google's Top-Rated Window Pros Near Lansdale, PA
Lansdale's 9 listings below come from Google Maps rather than a state license file. IECC climate zone 4A sets the energy bar for a Lansdale 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 Lansdale's climate means for your window spec
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD piles up about 5,008 heating degree days in a normal year, against 1,027 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 7.5 mi away.
9 top-rated window replacement companies in and near Lansdale
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 | Washington Windows | 94 | Window installation service | Lansdale 19446 | Google reviews | |
| 2 | Spring House Window & Door | 81 | Window installation service | Spring House 19477 | Google reviews | |
| 3 | Vasquez Siding LLC | 70 | Window installation service | Not listed | Google reviews | |
| 4 | Volpe Enterprises, Inc. | 636 | Window installation service | North Wales 19454 | Google reviews | |
| 5 | Alderfer Glass Company | 223 | Window supplier | Lansdale 19446 | Google reviews | |
| 6 | Janville Home Improvement | 49 | Window installation service | Lansdale 19446 | Google reviews | |
| 7 | Harleysville Windows | 4 | Window installation service | Not listed | Google reviews | |
| 8 | Lansdale Windows, Siding and Roofing Company | 6 | Window installation service | Not listed | Google reviews | |
| 9 | Roman & Sons Windows and Doors | 32 | Window installation service | Warrington 18976 | 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?