Licensed Window Contractors Based in Thousand Oaks, California
Thousand Oaks has 7 window replacement contractors on active state license records. The oldest of them has held a window or glazing license since 1987, and the median listing has carried one for 12 years.
Licenses checked · California Contractors State License Board
3CIECC climate zone · ENERGY STAR South-Central zone
What Thousand Oaks's climate means for your window spec
Thousand Oaks sits in IECC climate zone 3C, the starting point for any code-minimum window performance here.
ENERGY STAR places Ventura County in its South-Central zone for window certification.
Normal temperatures run 57°F in January and 69°F in July, so the glass package worth paying for in Thousand Oaks isn't the same one that pencils out two zones over.
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 12.1 mi away.
12median years licensed
The license record behind these listings
The median window license active in Thousand Oaks has been on the books for 12 years.
A small slice, 1 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 Thousand Oaks 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.
Thousand Oaks 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 |
|---|---|---|---|---|---|---|---|---|
| Arrow Glass Of Thousand Oaks | Window and glass contractor | C-17 Glazing | 510618 | Active | May 12, 1987 | May 31, 2027 | 91360 | Verify license |
| Ca Glass Installation INC | Window and glass contractor | C-17 Glazing | 1085751 | Active | Jan 7, 2022 | Jan 31, 2028 | 91360 | Verify license |
| Inflow Window LLC | Window and glass contractor | C-17 Glazing | 1117450 | Active | Mar 5, 2024 | Mar 31, 2028 | 91360 | Verify license |
| JS Glass & Mirror INC | Window and glass contractor | C-17 Glazing | 874284 | Active | Mar 13, 2006 | Mar 31, 2028 | 91360 | Verify license |
| KG Glass | Window and glass contractor | C-17 Glazing | 1103678 | Active | Apr 18, 2023 | Apr 30, 2027 | 91320 | Verify license |
| Valencia Glass Company | Window and glass contractor | C-17 Glazing | 814612 | Active | Nov 7, 2002 | Nov 30, 2026 | 91360 | Verify license |
| Window Design Group | Window and glass contractor | C-17 Glazing | 993370 | Active | Jun 3, 2014 | Jun 30, 2028 | 91360 | 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?