San Marino, CA's Highest-Rated Window Installers on Google
San Marino's 8 listings below come from Google Maps rather than a state license file. IECC climate zone 3B sets the energy bar for a San Marino window job no matter which kind of list a contractor's name comes from. Checked October 2026.
Google Maps ratings checked · How we rank
3BIECC climate zone · ENERGY STAR South-Central zone
What San Marino's climate means for your window spec
Los Angeles-Long Beach-Anaheim, CA piles up about 1,236 heating degree days in a normal year, against 1,604 on the cooling side of the ledger.
That's the load an ENERGY STAR-rated window in the South-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 2.5 mi away.
8 top-rated window replacement companies in and near San Marino
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 | D&R Auto Glass | 126 | Window installation service | Pasadena 91107 | Google reviews | |
| 2 | MJ'S Windows, Screen & Glass | 17 | Window installation service | Alhambra 91801 | Google reviews | |
| 3 | Cliffs Discount Glass | 30 | Window installation service | Pasadena 91107 | Google reviews | |
| 4 | Thurston Screen Co | 13 | Window supplier | Pasadena 91107 | Google reviews | |
| 5 | Pasadena Premier Windows | 3 | Window installation service | Pasadena 91106 | Google reviews | |
| 6 | S G Windows & Doors | 19 | Window supplier | Rosemead 91770 | Google reviews | |
| 7 | Green Coast Window and Door | 14 | Window supplier | South El Monte 91733 | Google reviews | |
| 8 | Pasadena Windows And Doors Experts | 5 | Window installation service | Pasadena 91101 | 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?