City of Los Angeles • Permits, Title 24 & fire zones
Window Replacement in Los Angeles, CA
In the City of Los Angeles, a like-for-like window swap is not permit-exempt: it goes through LADBS. This guide covers the Express Permit route, the Title 24 glazing rules, extra requirements in fire hazard zones, historic-district review and the LADWP rebate, with sources.
Last updated . Facts last checked against sources in October 2026.
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What's different in LA
Four local rules that shape a Los Angeles window project.
A permit, even for like-for-like
LADBS treats same-size, same-type window and door change-outs in residential buildings as an Express Permit (no plan check). Changing the size or type of an opening needs plans and doesn't qualify.
Dual glazing is required
LADBS states that dual glazing, labeled and certified by NFRC, is required for windows and doors replaced in residential buildings of three stories or less, citing Title 24, Part 6, Section 150.2(b)1B.
Fire-zone glazing rules
Homes in a Very High or High Fire Hazard Severity Zone must meet the California Wildland-Urban Interface Code, which sets specific glazing requirements for exterior windows and glazed doors, including on alterations to existing buildings.
HPOZ review
In a Historic Preservation Overlay Zone, exterior changes including windows are reviewed by City Planning before work starts. Confirm the rules for your specific zone with Planning staff.
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Codes & permits
What LADBS and Title 24 expect
Rules below apply to the City of Los Angeles. Many nearby cities, including Burbank and Glendale, run their own building departments, so check yours.
Express Permit & energy code
Window and door replacement in residential buildings is on LADBS's Express Permit list. California's 2025 Energy Code applies to permit applications filed on or after January 1, 2026, and Title 24 compliance forms for window alterations require the installed U-factor and SHGC to be at or below the values on the compliance documentation; temporary NFRC labels stay on until the inspector has verified them.
- Replacement windows must be dual-glazed and NFRC-labeled
- Your CEC climate zone depends on your address: LA spans more than one zone, so look yours up
- Ask your installer who pulls the permit and files the Title 24 paperwork
Fire hazard severity zones
LADBS's Fire Hazard Severity Zone checklist says exterior windows, window walls and glazed doors in these areas must use multilayered glazed panels with at least one tempered pane, glass block, 20-minute fire-rated glazing, or glazing that meets the State Fire Marshal's exterior-window test standard.
- Check your address on the City's fire hazard map before choosing a product
- Ask for the specific glazing option the installer is proposing in writing
Before you sign
How to buy windows in Los Angeles
A few LA-specific questions to put to every installer, on top of the general checklist in our guide to vetting a window installer.
Ask who is pulling the permit
Because replacement is not permit-exempt in the City of LA, an installer who suggests skipping the permit is a red flag. The permit and final inspection also matter for the rebate below.
Get U-factor and SHGC in writing
Ask for the NFRC label values for each window. They determine Title 24 compliance and rebate eligibility. Our retrofit vs. full-frame guide explains how install method affects the project.
Check the LADWP rebate before you order
LADWP's Consumer Rebate Program lists $2 per square foot for ENERGY STAR windows and glass doors with U-factor 0.30 or lower and SHGC 0.25 or lower. Replacement only (not new construction, additions or ADUs), LADWP customers only, funding is limited and first-come, first-served, and you need the itemized invoice, NFRC label or spec sheet, and a final approved Building and Safety permit. Confirm current funding on LADWP's site.
Don't count on a federal credit
The federal 25C credit for windows and doors ended for property placed in service after December 31, 2025. See our 2026 tax credit explainer.
Pricing varies widely by home, product and installer. For national price ranges see our 2026 window replacement cost breakdown.
FAQ
Los Angeles window replacement questions
Do I need a permit to replace windows in Los Angeles?
In the City of Los Angeles, yes. LADBS lists same-size, same-type window and door replacement in residential buildings as an Express Permit, and changes in size or type need plans. Cities elsewhere in Los Angeles County, such as Burbank and Glendale, have their own building departments, so confirm with yours.
What does Title 24 require for replacement windows in LA?
LADBS says dual glazing, labeled and certified by NFRC, is required when replacing windows and doors in residential buildings of three stories or less. The exact U-factor and SHGC limits depend on your California Energy Commission climate zone, which you can look up by address, so ask your installer to document compliance.
Are there extra window rules in fire zones?
Yes. Buildings in a Very High or High Fire Hazard Severity Zone must comply with the California Wildland-Urban Interface Code as amended by the City, which requires specific glazing such as multilayered panels with at least one tempered pane, glass block, or fire-rated glazing.
Is there an LA rebate for energy-efficient windows?
LADWP's Consumer Rebate Program has listed $2 per square foot for qualifying ENERGY STAR windows and glass doors for LADWP customers, with limited first-come, first-served funding. Check LADWP's site for current availability and required documents before you buy.
Can I still get the federal tax credit for windows?
No. The federal Energy Efficient Home Improvement Credit does not apply to windows or doors placed in service after December 31, 2025, so there is no federal credit for 2026 installs.
What if my home is in an HPOZ?
Exterior changes, including window replacement, are reviewed by City Planning in a Historic Preservation Overlay Zone. Contact Planning staff before ordering anything, since requirements depend on your zone and your home's character-defining features.
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Sources & last checked October 2026
Codes, permits and incentives change. Confirm with your local building department and installer before you sign.
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