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How the Window Replacement Process Works in Los Angeles, From First Call to Final Inspection
Most window jobs in LA follow the same path: a call, an in-home measurement, a written quote, a permit, a few weeks to build the windows and one to two days to install a retrofit. The final inspection closes the permit, and that final is what you need for LADWP’s window rebate. PaneRight LA connects you with a local contractor for each step of the window replacement process, and this page shows what to expect and what to ask.
Call (424) 230-8336 to start.
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What Happens When You Call PaneRight LA?
You tell us about the windows, and we connect you with a local contractor who serves your area.
01
How Are You Matched With a Local Window Contractor?
Your call goes to an independent contractor who works in your city and handles the type of job you describe. The contractor sets the measurement visit, the price and the schedule. Check the contractor’s license at the Contractors State License Board before you sign anything.
02
What Should You Have Ready for the First Call?
- Your address, so the right permit office and contractor are matched.
- The number of windows and which rooms they’re in.
- The problem: heat, noise, fog, drafts, leaks or broken glass.
- A few photos of the windows, inside and out.
- Your home’s age, since homes built before 1978 need lead-safe work.
What Happens at the In-Home Measurement?
The contractor measures every opening and checks the frames before quoting.
01
How Are Windows Measured for Replacement?
Width is measured at the top, middle and bottom of each opening, and height at the left, center and right. The smallest numbers set the window size. The contractor also checks that the opening is square, the sill is level and the frame is dry and solid.
02
Retrofit or Full-Frame: How Is the Install Method Picked?
Straight, dry frames can take a retrofit window that fits over the old frame and leaves the stucco alone. Rotted or leaking frames need full-frame work; see retrofit windows for how the choice is made.
What Should Your Written Quote and Contract Include?
California requires home improvement contracts to be in writing, and they must show the contractor’s license number.
Which Items Should Be Listed for Every Window?
| Item | Why it matters |
|---|---|
| Brand, series and frame material | So you can compare quotes fairly |
| U-factor and SHGC | Proof the window meets Title 24 |
| Retrofit or full-frame | Sets the price and the stucco work |
| Glass type (low-E, tempered, laminated) | Safety glass where code calls for it |
| Permit, removal and haul-away | Costs that are easy to leave out |
| Who patches stucco, drywall and trim | Avoids a surprise bill |
| Manufacturer and labor warranty terms | Ask for both in writing |
How Much Can a Contractor Ask for Up Front?
No more than $1,000 or 10% of the contract price, whichever is less, under Business and Professions Code Section 7159.5. Later payments should match work that’s done or windows that have arrived.
Can You Cancel After You Sign?
Yes, when you sign a home improvement contract at home. You get three business days to cancel, or five if you’re 65 or older. The cancel notice has to be part of the contract.
How Long Do Permits and Window Orders Take?
The permit and the window order run at the same time, so the wait is mostly the build time.
01
Who Pulls the Permit in Your City?
The contractor pulls it, but the office depends on your city line: LADBS in the City of LA, LA County for Altadena and each city’s own office elsewhere. See the permit table on our service areas page.
02
How Long Does It Take to Build Custom Windows?
Replacement windows are built to each opening’s size after the order is placed. Tempered and laminated glass is also made to order.
What Happens on Install Day?
Most retrofit jobs take one to two days for a house; full-frame work takes longer because of stucco and paint.
01
How Should You Prepare Your Home?
Clear about three feet in front of each window. Take down blinds, curtains and wall hangings near the frames. Move pets to a closed room, and tell the crew about any alarm sensors on the windows.
02
Does Window Replacement Include Trim and Stucco Patching?
It should, but check the quote. Retrofit installs replace the interior stops and seal the new flange to the stucco. Full-frame installs need exterior stucco patching and interior drywall or trim work, and the quote should say who paints.
03
Can You Stay Home During the Work?
Yes. Each opening is only open for a short time, and the house is closed up at the end of each day. Keep kids and pets out of the rooms being worked on.
What Does the Final Inspection Check?
The inspector checks that the job matches the permit and the code, and it’s the last step in the window replacement process.
| Check | What the inspector looks for |
|---|---|
| NFRC labels | U-factor and SHGC that meet Title 24, so leave labels on until the final |
| Safety glass | Tempered or laminated glass near doors, tubs and low panes; see tempered glass |
| Bedroom windows | A clear opening that still meets egress; see egress windows |
| Smoke and CO alarms | Working alarms, which California requires on many permits over $1,000 |
| Sliding windows | A locking device and an anti-lift device |
What Should You Keep After the Job Is Done?
- The final permit. You’ll need it for the LADWP rebate and when you sell.
- The final invoice and contract.
- An unconditional lien release, so no supplier can claim unpaid bills against your home.
- Warranty papers. Register the windows with the manufacturer.
- Photos of the NFRC labels, before they come off.
Our Process FAQs
How Long Does Window Replacement Take From Start to Finish?
A few weeks for the permit and custom windows, then one to two days to install a retrofit on most houses. The permit and the window build are the longest window replacement steps, not the install.
Do You Need to Be Home for the Inspection?
Someone has to let the inspector in, since the inspector looks at the windows from inside and out. Your contractor can tell you the inspection window.
What If a Window Arrives Damaged or the Wrong Size?
It shouldn’t go in. The contractor checks each window on delivery, and a damaged or wrong-size unit is sent back and reordered under the maker’s terms.
Is Old Window Paint a Lead Risk?
On homes built before 1978, yes. EPA’s rule requires certified renovators to use lead-safe methods and give you the Renovate Right pamphlet before work starts.
Ready to Start? Call (424) 230-8336
Call (424) 230-8336 or send your address and window count through the free quote form. You’ll be connected with a local contractor to book the in-home measurement.
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.