Should You Replace Your Windows Before Selling a California House?

Sellers ask this more than almost any other window question, and they often ask it too late, after the inspection report has come back with a list. The better time is a few months before listing, when there is room to do it properly or to decide not to.

This page is part of our California window guide. It is general information, not legal or real estate advice. Your listing agent and, for disclosure questions, a real estate attorney are the people to rely on for your sale.

The short answer

For most houses, replacing every window purely to sell is not the best use of money. Repair what is broken, replace what has failed, make sure everything opens and locks, and disclose the rest.

The exceptions are real, though. Whole-house replacement before a sale can make sense when:

• the windows are original single-pane aluminum or wood in a market where comparable listings have been updated;
• several units have visibly failed and the rest are the same age;
• there is water damage around openings that has to be opened up anyway;
• the house is being positioned at the top of its range, where buyers expect little to do; or
• you were going to replace them soon and the timing simply moved up.

What buyers and inspectors look at

A home inspector is hired by the buyer to find problems, and windows are quick to test. Expect each of these to be checked and written up:

• Operation. Does each window open, stay open, close and lock? Painted-shut sashes, broken balances and missing locks all get noted.
• Failed seals. Fog or mineral haze between the panes of an insulated unit. See why windows fog between the panes.
• Cracked or broken glass.
• Water. Staining on sills or below windows, soft wood, swollen trim, failed caulking, and missing or damaged flashing.
• Bedroom egress. Whether sleeping rooms have a window a person could get out of. See our page on egress window requirements.
• Safety glazing. Whether glass next to doors, in bathrooms and near the floor is tempered or laminated. See California requirements for tempered glass.
• Screens. Missing and torn screens are a small item that makes a long list longer.

None of these necessarily means a new window. A failed insulated glass unit can often be replaced in its frame. Balances, locks, rollers and screens are repairs. What an inspection report does is turn every one of them into a line a buyer can attach a number to.

A pre-listing inspection, paid for by you, tells you what that list will say while you still have time to choose your response.

What you have to disclose

The Transfer Disclosure Statement

Civil Code section 1102 applies California's seller disclosure rules to transfers of single-family residential property, as the statute defines it, by sale, exchange, real property sales contract, lease with an option to purchase, and similar arrangements. Section 1102(c) says that any waiver of these requirements is void as against public policy. An "as is" sale does not remove the duty to disclose.

Section 1102.6 prescribes the form, the Real Estate Transfer Disclosure Statement. On it, the seller reports what is known about the property's condition. For windows, three parts matter:

• Features of the property. The form's checklist includes window-related items such as window screens and window security bars, with a question on whether any listed item is not in operating condition.
• Known defects and malfunctions. The seller is asked about significant defects in listed components, and windows are one of them.
• Permits and code compliance. The seller is asked whether they are aware of room additions, structural modifications, or other alterations or repairs made without necessary permits, and whether any were not in compliance with building codes.

The standard is your knowledge. You are not required to commission an investigation, but you are required to be truthful about what you know.

Unpermitted window work

Window replacement generally needs a permit in California. Many past replacements were done without one. If you know that windows in your house were replaced without a permit, by you or by an earlier owner, the disclosure form asks about exactly that.

You have three ways to handle it:

1. Disclose it. Many sales go through with disclosed unpermitted work. The buyer decides how much it matters.
2. Legalize it first. Ask the building department what an after-the-fact permit involves. For windows, the inspector will look at energy code compliance, safety glazing and bedroom egress. A window that would not have passed then may need to be changed now.
3. Replace with a permit. If the unpermitted windows are also poor, replacing them under a permit settles both problems.

The fourth option, staying silent, is the one that produces lawsuits. Our page on permits for retrofit windows in California explains what the permit covers.

If you bought recently: section 1102.6h

Civil Code section 1102.6h adds a disclosure for quick resales. It applies when a seller accepts an offer within 18 months of the date title was transferred to them, for offers accepted on or after 1 July 2024. The seller must disclose:

• room additions, structural modifications, other alterations or repairs made since title transferred, where the work was performed by a contractor the seller hired;
• the name of each contractor and any contact information the contractor provided, for contracts above the price threshold the statute refers to; and
• a copy of any permit obtained. If the seller does not have copies because a contractor pulled the permits, the seller may tell the buyer the information can be obtained from that contractor and give the contact details.

If you bought a house, replaced the windows and are selling within a year and a half, keep the contract, the contractor's details and the permit together. You will be handing them over.

Lead-based paint in older homes

For most housing built before 1978, federal law requires a seller to disclose known lead-based paint and lead hazards, provide available records and reports, give the buyer EPA's pamphlet "Protect Your Family From Lead in Your Home", and allow the buyer a 10-day period to arrange a lead inspection or risk assessment, which the parties can lengthen, shorten or waive in writing.

Old painted windows are a common location for lead hazards. If you replace them before selling, the work itself has to follow lead-safe rules. See lead paint and window replacement in pre-1978 homes.

Condominiums, from 2027

A law taking effect on 1 January 2027 (Civil Code section 4754, added by SB 908) lets condominium owners replace windows that are exclusive use common area on certain conditions. One condition is that the owner, and each later owner, discloses to prospective buyers the existence of the window replacement project and the owner's continuing responsibility for it. See HOA approval for window replacement in California.

What "Cost vs. Value" does and does not tell you

Agents and contractors often quote the Cost vs. Value Report, an annual study published by the remodeling trade press. It compares the estimated cost of a set of standard projects, window replacement among them, with the value real estate professionals estimate each adds at resale, broken out by region and city.

It is a useful reference if you read it for what it is.

• It reports averages of estimates for a defined, standardized project. Your house and your scope are not that project.
• It measures value at resale only. It does not count lower energy bills or comfort while you live there.
• The figures move from year to year. A percentage quoted in a brochure may be from an old edition or a different region.

We are not quoting its numbers here, because they change every year and the report is the place to read them. Look up the current edition for the Pacific region or your metro area. If a salesperson gives you a return-on-investment figure, ask which edition and which region it came from.

Our own view is that you should not buy windows expecting to get the full cost back at closing. Buy them before a sale because the old ones would cost you more in price reductions, repair credits or days on the market than the new ones cost to install. For current pricing, see window replacement cost in Sacramento and the Bay Area.

The energy and comfort selling point

New windows give an agent something concrete to say, as long as the claim is documented.

• Keep the NFRC stickers or the order paperwork showing U-factor and SHGC. "Dual-pane Low-E windows installed 2026, U-factor 0.27" is a fact. "Energy efficient windows" is an adjective. How to read an NFRC label explains the figures.
• Keep the permit and final inspection sign-off. It shows the windows met the energy code in force when they were installed. See what Title 24 requires of replacement windows.
• Keep the warranty documents and check whether the manufacturer's warranty transfers to a new owner and what has to be done to transfer it. Terms vary by manufacturer.
• Describe comfort honestly. In a Sacramento Valley summer, low solar heat gain glass on west and south windows is something a buyer can feel on a showing in July. Near a freeway or a flight path, quieter rooms are the selling point.

Do not promise a buyer a particular saving on utility bills, and do not advertise a federal tax credit. The credit for windows ended for property placed in service after 2025.

A sensible order of work

1. Three to six months before listing, walk the house and test every window. Note what is broken, fogged, stuck or stained.
2. Get a pre-listing inspection if the house is older or you have not looked closely in years.
3. Repair first. Locks, balances, rollers, screens, caulking, and individual glass units.
4. Deal with water. Any leak or rot at an opening should be fixed properly, not painted over.
5. Decide on replacement by elevation. The front of the house and the worst-weathered side come first. Match the remaining windows.
6. Allow for lead time. Custom windows take weeks to arrive, and the permit needs a final inspection. Do not schedule installation for the week before photographs.
7. Gather the file. Contract, permit, final inspection, NFRC data, warranty.
8. Fill in the disclosures with what you now know.

When not to replace

• The buyer is likely to remodel or rebuild. On a house being sold for its lot or as a project, new windows are money the buyer will not pay for.
• The windows are older but sound. Clean, working, undamaged dual-pane windows are not an objection.
• Original windows are part of the character. In a historic or mid-century house, original wood or steel windows in good repair can be an asset, and replacing them with the wrong product can hurt.
• You are out of time. A rushed installation that is not finished or not inspected is worse than a disclosed defect.

For how to judge whether windows are at the end of their life, see how often windows should be replaced. If you do get quotes, how to compare window replacement quotes will keep them on the same footing.

Sources

• Civil Code section 1102 (transfers covered, waiver void)
• Civil Code section 1102.6 (Real Estate Transfer Disclosure Statement)
• Civil Code section 1102.6h (disclosures on resale within 18 months)
• EPA: real estate disclosures about potential lead hazards
• Senate Bill 908 (Chapter 787, Statutes of 2026)
• IRS: Energy Efficient Home Improvement Credit

Working with Heritage Exteriors

If you are preparing to sell, we will tell you which windows need replacing, which can be repaired, and which are fine to leave, and we will give you a realistic lead time so the work is finished and inspected before you list. You get the permit, the product data and the warranty paperwork to pass to your buyer. Licensed in California, CSLB #1055919. Call (916) 546-2991.