5 window replacement contractors Based in San Luis Obispo
Window replacement contractors in San Luis Obispo range from long-standing shops to 0 newer entrants licensed in the last two years. Every name below comes from the California license record, not a paid submission.
Licenses checked · California Contractors State License Board
3CIECC climate zone · ENERGY STAR South-Central zone
What San Luis Obispo's climate means for your window spec
Weather at that level is one more reason the flashing and sill pan under a San Luis Obispo window matter as much as the glass sitting in it.
So ask any San Luis Obispo contractor how they handle both, not just which brand they carry.
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.
13median years licensed
The license record behind these listings
The median window license active in San Luis Obispo has been on the books for 13 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 San Luis Obispo 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.
San Luis Obispo 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 |
|---|---|---|---|---|---|---|---|---|
| Aggson's Paint & Glass | Window and glass contractor | C-17 Glazing | 827089 | Active | Nov 5, 2003 | Nov 30, 2027 | 93401 | Verify license |
| Contractor's Glass CO | Window and glass contractor | C-17 Glazing | 369810 | Active | Feb 23, 1979 | Feb 28, 2027 | 93401 | Verify license |
| Kairos Manufacturing INC | Window and glass contractor | B General Building / C-17 Glazing | 1030116 | Active | Aug 17, 2017 | Aug 31, 2027 | 93401 | Verify license |
| Monarch Window INC | Window and glass contractor | B General Building / C-17 Glazing | 989546 | Active | Jan 7, 2014 | Jan 31, 2028 | 93401 | Verify license |
| San Luis Glass & Window INC | Window and glass contractor | C-17 Glazing | 1087322 | Active | Feb 15, 2022 | Feb 29, 2028 | 93406 | 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?