Licensed Window Contractors Based in Sherman Oaks, California
Window replacement contractors in Sherman Oaks 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
3BIECC climate zone · ENERGY STAR South-Central zone
What Sherman Oaks's climate means for your window spec
Los Angeles County sees about 18.1 inches of precipitation and 0.0 inches of snow in a normal year.
Weather at that level is one more reason the flashing and sill pan under a Sherman Oaks window matter as much as the glass sitting in it.
So ask any Sherman Oaks 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 4.3 mi away.
22median years licensed
The license record behind these listings
The median window license active in Sherman Oaks has been on the books for 22 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 Sherman 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.
Window contractors licensed to work in Sherman Oaks, CA
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 |
|---|---|---|---|---|---|---|---|---|
| Concept Installs INC | Window and glass contractor | B General Building / C-17 Glazing | 811657 | Active | Aug 20, 2002 | Jul 31, 2027 | 91423 | Verify license |
| Duffy's Custom Glass & Mirror | Window and glass contractor | C-17 Glazing | 704994 | Active | Apr 7, 1995 | Apr 30, 2027 | 91413 | Verify license |
| Glass Definition INC | Window and glass contractor | C-17 Glazing | 1016929 | Active | Aug 5, 2016 | Aug 31, 2028 | 91413 | Verify license |
| John R Enterprises INC | Window and glass contractor | C-17 Glazing | 886630 | Active | Nov 2, 2006 | Nov 30, 2026 | 91403 | Verify license |
| Landmark Construction And Development Group INC | Window and glass contractor | B General Building / C-17 Glazing | 989394 | Active | Dec 26, 2013 | Dec 31, 2027 | 91401 | Verify license |
| Precise Home Builders INC | Window and glass contractor | B General Building / C-17 Glazing | 515469 | Active | Aug 3, 1987 | Jul 31, 2027 | 91403 | Verify license |
| Property Improvement Specialists INC | Window and glass contractor | B General Building / C-17 Glazing | 844079 | Active | Aug 4, 2004 | Aug 31, 2028 | 91423 | Verify license |
| Reli Ca Construction INC | Window and glass contractor | B General Building / C-17 Glazing | 1109043 | Active | Aug 22, 2023 | Aug 31, 2027 | 91403 | Verify license |
| Ruben's Glass & Mirrors | Window and glass contractor | C-17 Glazing | 434468 | Active | Feb 3, 1983 | Feb 28, 2027 | 91423 | 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?