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Do You Need a Permit to Replace Windows in California? Los Angeles Rules, City by City
Search this question and you’ll find blogs saying a same-size window swap needs no permit. In Los Angeles, that advice can cost you. LADBS and the other building departments in the areas we cover issue permits for window replacement, and the state energy code sets the ratings each new window has to meet. You’ll see which jobs need a permit, what the inspector checks, which office issues yours and what happens if you skip it.
Planning new windows? Call (424) 230-8336 to talk with a local contractor who pulls the permit for you.
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Do You Need a Permit to Replace Windows in California?
Yes, for a full window replacement. California’s building codes require a permit to alter a building, and window replacement isn’t on the short list of work the code exempts. The fast “express” permits some LA cities offer are still permits.
Replacing only the glass in an existing frame is a different job. The 2025 California Energy Code treats glass replaced in an existing sash, or a sash replaced in an existing frame, as a repair (Title 24, Part 6, Section 150.2). Glendale, for one, doesn’t require a building permit for glass-only work.
01
Where Does the “No Permit for Like-for-Like” Idea Come From?
Some cities outside LA wave through same-size swaps, and contractor blogs repeat that as a statewide rule. It isn’t one. Your city’s building department decides, and in LA the answer for a full window change-out is a permit.
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What About the 75 Square Foot Rule?
You’ll see “you only need a permit over 75 square feet” online. That number comes from the energy code, not the permit rules. Up to 75 square feet of replacement windows can meet a looser energy limit, a U-factor of 0.40 and a solar heat gain coefficient (SHGC) of 0.35, instead of the standard 0.30 and 0.23. You still need the permit.
Which Window Jobs Need a Permit in Los Angeles?
| Job | Permit? | What to know |
|---|---|---|
| New glass in an existing frame | No, in most cities | Counts as a repair under the energy code; check your city |
| New sash in an existing frame | Ask your city | The energy code calls it a repair; building departments vary |
| Screens, locks, rollers, balances | No | Parts repair, not an alteration |
| Retrofit window, same size and type | Yes | LA City issues it online as an e-Permit |
| Full-frame window, same size and type | Yes | Same permit; stucco patching is part of the job |
| Bigger, smaller, moved or new opening | Yes, with plan check | Floor plans, and engineering in some cases |
| Window turned into a door | Yes, with plan check | Structural change to the wall |
In the City of LA, LADBS limits the online e-Permit to windows with the same size, opening type and location as the old ones. Change any of those and the job goes to plan check at a LADBS Construction Services Center, such as the Metro office on Figueroa Street downtown or the Van Nuys office on Van Nuys Boulevard. LADBS also asks for structural calculations from a licensed engineer or architect on buildings over one story, or when a new window is much larger than the old one.
LA County sets its own limit on retrofit windows in unincorporated areas like Altadena. Its residential guide says a retrofit can only go into an existing approved opening with a framed, weathertight assembly.
What Does the Window Inspector Check?
LADBS says one final inspection covers most window replacement permits. The inspector looks at the windows, their labels and the rooms they serve.
01
Energy Code Ratings on the NFRC Label
Replacement windows in the LA area need a U-factor of 0.30 or lower and an SHGC of 0.23 or lower under Title 24, Part 6. The inspector reads these off the NFRC sticker on each window, so leave the stickers on until sign-off.
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Bedroom Escape Openings
Every sleeping room needs one window or door that opens for emergency escape. LADBS lists the minimums: a net clear opening of 5.7 square feet, at least 24 inches high and 20 inches wide, with the sill no more than 44 inches above the floor. A replacement that shrinks the opening below these sizes fails. See egress windows for how sliders and casements measure.
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Safety Glass, Locks and Airport Noise Zones
- Tempered glass in the spots the code calls hazardous, like next to doors, in tubs and showers and near stairs. See tempered glass for the locations.
- Slider locks. LADBS requires sliding windows to have a lock and a device in the upper channel that stops the panel from being lifted out.
- Airport noise ratings. Homes inside a City of LA airport noise boundary, like the areas around LAX and Van Nuys Airport, need replacement windows with a sound rating of STC 35 to STC 44, depending on the noise zone. Our soundproof windows page covers STC ratings.
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Smoke Alarms
California Health and Safety Code Section 13113.7 says a permit for alterations, repairs or additions over $1,000 on a dwelling can’t be signed off until the owner shows the required smoke alarms are in place (Health and Safety Code 13113.7). Most whole-house window jobs pass $1,000, so test your alarms before inspection day.
Who Issues the Window Permit Where You Live?
Your permit office depends on your city line, not your ZIP code or mailing address.
| Area | Permit office | Quick note |
|---|---|---|
| Most of the San Fernando Valley, Pacific Palisades | LADBS (City of LA) | Online e-Permit for same-size swaps |
| Santa Monica | City of Santa Monica | Express Permit for single-family same-size swaps |
| Beverly Hills | City of Beverly Hills | Issued at the public counter when the job qualifies |
| Burbank | City of Burbank | Tier 1 permit skips plan check |
| Glendale | City of Glendale | Full change-outs get permit and Planning review |
| Pasadena | City of Pasadena | Landmark districts need a Certificate of Appropriateness first |
| Altadena | LA County | Unincorporated, so not Pasadena |
| Long Beach | City of Long Beach | Express Permit outside historic districts |
| South Bay | Each city’s own office | Manhattan Beach has a window and door change-out permit |
Each area page covers the local rules in full. Start from our service areas page.
Who Pulls the Permit: You or the Contractor?
The contractor you hire normally pulls it, and the permit fee shows up as a line on the quote. Ask to see the permit number before work starts, and check it on your city’s permit lookup.
You can pull the permit yourself as an owner-builder. Before you do, know that the owner-builder is the one responsible for meeting code and passing inspection, even when someone else installs the windows. Our process page shows where the permit fits in the timeline.
What Happens If You Replace Windows Without a Permit?
Three things can come back to you later.
- Selling the house. California’s Real Estate Transfer Disclosure Statement asks sellers about alterations or repairs made without the needed permits. A buyer’s inspector can spot new windows with no permit on record.
- Losing a rebate. LADWP’s window rebate needs a finaled permit, so an unpermitted job gives up that money.
- Legalizing it later. A permit pulled after the fact gets the same inspection. Windows that miss the energy ratings or shrink a bedroom escape opening may have to come out.
Window Permit FAQs
How Long Does a Window Permit Take in Los Angeles?
A same-size job in the City of LA can be issued online through the LADBS e-Permit system. Jobs that change the size or type of a window wait for plan check, which adds time before the windows can go in. Custom windows take a few weeks to build, so contractors pull the permit while the windows are on order.
Do Condo Owners Need a Permit and HOA Approval?
Both, in most buildings. The city issues the permit, and the HOA’s rules decide the color, grid pattern and frame style you can use. See our HOA and condo page.
Can You Get a Permit After the Windows Are Already In?
Yes. Call your building department and ask for a permit for work already done. Plan on an inspector checking the NFRC labels, safety glass and bedroom openings the same way they would on a new job.
Get Permitted Window Replacement: Call (424) 230-8336
PaneRight LA connects Los Angeles homeowners with independent local window contractors who pull permits in LADBS, LA County and every city we cover. The contractor sets the price, schedule and permit fee, so check their license with the Contractors State License Board before you sign. Calls may be recorded.
Call (424) 230-8336 or request a free quote(/free-quote/).
PaneRight LA is an advertising and referral service, not a contractor. We connect you with independent local window contractors who may pay us for referrals. Calls may be recorded.