Window Replacement Contractors in Tustin, CA
Tustin has 5 window replacement contractors on active state license records. The oldest of them has held a window or glazing license since 1985, and the median listing has carried one for 24 years.
Licenses checked · California Contractors State License Board
3BIECC climate zone · ENERGY STAR South-Central zone
What Tustin's climate means for your window spec
Los Angeles-Long Beach-Anaheim, CA piles up about 927 heating degree days in a normal year, against 1,335 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.
A contractor pulled from Tustin's license record should be able to name the right U-factor for zone 3B before they ever measure an opening.
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 3.4 mi away.
24median years licensed
The license record behind these listings
The median window license active in Tustin has been on the books for 24 years.
A small slice, 0 of them, sit inside a 90-day window for renewal as of our last check, which is ordinary license-cycle timing rather than a mark against the business.
Match the number on any Tustin listing here against California's own lookup before you pick up the phone.
Data: California Contractors State License Board license records, checked 2026-09-30.
Tustin window and glazing licenses on file
Listed A to Z by business name. No listed business paid for placement or position.
| Business | Category | License class | License no. | Status | Effective | Expires | ZIP | Official record |
|---|---|---|---|---|---|---|---|---|
| Alu - Glass INC | Window and glass contractor | C-17 Glazing | 1035746 | Active | Feb 8, 2018 | Feb 29, 2028 | 92781 | Verify license |
| Diamond Glass | Window and glass contractor | C-17 Glazing | 481354 | Active | Oct 21, 1985 | Oct 31, 2027 | 92780 | Verify license |
| Industrial Glass Services INC | Window and glass contractor | C-17 Glazing | 485546 | Active | Jan 15, 1986 | Jan 31, 2028 | 92780 | Verify license |
| Peak Power Solutions INC | Window and glass contractor | B General Building / C-17 Glazing | 973253 | Active | May 24, 2012 | May 31, 2028 | 92780 | Verify license |
| Vinyl Window Broker INC | Window and glass contractor | C-17 Glazing | 817359 | Active | Feb 18, 2003 | Jul 31, 2028 | 92780 | Verify license |
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?