Window replacement questions from LA homeowners

Written and checked by the DuloCore research team. Last verified: November 11, 2026.

These are the questions Los Angeles homeowners ask most about replacing windows, answered from official City, LADWP, state and federal pages; the estimator is on the home page, and the longer explanations are on the rebate page and permit page.

Do I need a permit to replace windows in Los Angeles?

Yes. In the City of Los Angeles, a same-size, same-type window swap uses an LADBS Express Permit; changing a window's size, opening type or location needs plan check at an LADBS counter (LADBS).

How much is the LADWP window rebate?

$2.00 per square foot of qualifying window, for windows rated U-factor 0.30 or lower and SHGC 0.25 or lower (LADWP Consumer Rebate Program, checked Nov 11, 2026).

Is there a maximum LADWP window rebate?

LADWP's pages state no per-home cap for windows, but the rebate cannot exceed what you paid, and funds are limited and first come, first served (LADWP program terms).

My address says Los Angeles but SCE sends my electric bill. Can I get the LADWP rebate?

No. You must be an LADWP residential customer with active electric meter service at the address (LADWP). SCE customers should check SCE's own rebate listings.

Can I claim the federal 25C tax credit for windows installed in 2026?

No. The IRS says the credit will not be allowed for any property placed in service after December 31, 2025 (IRS FS-2025-05).

I live in an HPOZ. Can I replace old wood windows with vinyl?

Not without review. Every exterior change in an HPOZ needs City Planning review, including work that needs no building permit (LA City Planning). Ask your district planner before ordering.

What window glass is required in a Very High Fire Hazard Severity Zone?

Multi-pane units with at least one tempered pane, glass block, a 20-minute fire rating, or glazing tested to SFM 12-7A-2 (LADBS).

What license should a window installer have?

Usually a C-17 Glazing license, or a B General Building contractor who meets the two-trade rule or subcontracts to a licensed specialty contractor (CSLB).

How big a down payment can a window contractor ask for?

No more than 10 percent of the contract price or $1,000, whichever is less, unless the contractor has a blanket performance and payment bond (CSLB).