Can You Sell a South Bay House With Unpermitted Work?

Can you sell a house with unpermitted work in California?

Yes. California law does not stop you from selling a house with unpermitted work, but it does require you to disclose everything you know about it on the Transfer Disclosure Statement. In the South Bay, the real question is not whether you can sell. It is how: legalize the work with a retroactive permit, price the home to reflect it and sell as-is with full disclosure, remove the work, or take an investor offer. The right path depends on what was built, which city the house sits in, and how much time you have before you need to be on the market.

By Ben Larson | September 27, 2026

If you have owned a South Bay house long enough, there is a good chance something on it was built without a permit. A garage converted to a den in the 1970s. A patio enclosed into a family room. A third bathroom that appeared one summer. A back unit that has quietly housed a relative for twenty years.

This is one of the most common questions sellers quietly ask before listing, and the forum threads show the same fear over and over: one seller on a legal Q&A site asked whether their agent "has to tell buyers" about an illegally converted garage. The honest answer is yes. You both do. And once you accept that, the decision gets much simpler, because you are no longer deciding whether to hide it. You are deciding how to sell it.

Here is how I walk South Bay sellers through that decision.

Disclosure is not optional, even on an as-is sale

The California Transfer Disclosure Statement asks you directly whether any additions, structural modifications, or other alterations were made without permits. If you know about unpermitted work, you disclose it. That includes work a previous owner did, as long as you know about it.

Two things sellers get wrong here:

• "As-is" does not mean undisclosed. Selling as-is limits your obligation to make repairs. It does not touch your obligation to disclose. The two are separate, and both apply to every sale.
• The risk does not end at closing. California courts have held sellers liable for concealing known unpermitted work, including work done before they owned the house. A buyer who discovers a hidden conversion after closing can come back years later, and the cost of that fight dwarfs whatever the disclosure would have cost you in negotiation.

Disclosure sounds scary until you see what it actually does in practice. A disclosed converted garage is a pricing conversation. A concealed one is a lawsuit. I have never seen honest disclosure kill a deal that was priced correctly, and I have watched concealment blow up escrows and worse.

If you are not sure what you are required to disclose, that is a conversation for a real estate attorney, and it is worth having before you list, not after an offer comes in. My post on what South Bay sellers must deliver before escrow can close covers the city report side of the same conversation.

Why South Bay houses fail the permit test so often

Most of the housing stock in Torrance, Redondo Beach, Lomita, and the Palos Verdes Peninsula was built between the 1940s and the 1970s. Sixty to eighty years is a long time for owners to add bathrooms, enclose patios, and convert garages, and a lot of that work never saw a permit.

The tell is usually square footage. If your house lives larger than the county records say it is, a buyer's agent will notice, because the records are the first thing they check. Appraisers generally will not count unpermitted space as living area either, which is why a 2,100 square foot house with an unpermitted 400 square foot addition often appraises like the 1,700 square foot house the county thinks it is.

Permit history is also easier to pull than it used to be. Buyers and their agents routinely request records from the city before the inspection contingency runs. Assume the buyer will know. Plan accordingly.

One more South Bay wrinkle: each city runs its own building department. San Pedro and Harbor City fall under Los Angeles Building and Safety. Torrance, Redondo Beach, Palos Verdes Estates, Rancho Palos Verdes, Rolling Hills Estates, Hermosa Beach, Manhattan Beach, Lomita, and El Segundo each handle their own permits, records, and legalization processes. What takes six weeks in one city can take six months next door, so the address on the deed matters as much as the work itself.

Your four real options before you list

1. Legalize it with a retroactive permit. You hire a designer or contractor to draw the work as built, submit to the city, correct whatever does not meet code, and finish with permitted, countable square footage. In the LA Building and Safety area, permit and plan check fees commonly run $1,500 to $5,000 for single-trade work and $5,000 to $25,000 or more for structural additions once drawings and engineering are included, plus the cost of corrections, which can range from minor fixes to major work. Plan check alone often takes 4 to 12 weeks, and complex projects can take longer. Fees and timelines vary city by city, so call the building department first. This path adds the most value but costs the most time.

2. Special case: the unpermitted ADU. If your unpermitted back unit, garage conversion, or junior unit was built before January 1, 2020, California's AB 2533 gives you a legalization path most South Bay owners have never heard of. Cities must offer a way to permit these units, cannot deny the application unless the unit poses a genuine health and safety problem, cannot pile on penalty fees, and must publish a checklist of what needs fixing. You even have the right to a confidential inspection by a licensed third party before you apply, so you can find out what you are facing without putting the city on notice. If your house has an old bootleg unit, check this before you assume the worst.

3. Remove it and restore the original condition. For work that cannot be legalized or is not worth the cost, tearing it out is sometimes the cleanest answer. Once the space is returned to its permitted condition, the disclosure becomes simple history. This makes sense most often for marginal work: a flimsy patio enclosure, an amateur wet bar plumbing job, a partition wall.

4. Disclose, price it, and sell as-is. This is the most common path, and for many sellers the right one. You disclose the work fully, market the house on its permitted square footage, and let the price account for the buyer taking on the permit question. Unpermitted work commonly discounts a sale by something in the 5 to 20 percent range depending on what it is, how well it was built, and how much of the home's value rides on it. In a market where well-positioned South Bay homes still draw one to two offers, a fairly priced house with clean disclosures sells.

A direct investor sale is a subset of option four: faster and quieter, but investor offers on unpermitted South Bay homes typically land well below what disclosed, priced-right open marketing produces. On a $1.5 million Torrance house, that spread is real money.

Which option nets you more is a math problem, not a feelings problem. The cost to legalize, the value the permitted space adds, your timeline, and your city's process all go into it. That is the analysis I run with sellers before we ever pick a list price.

If the buyer's inspector finds it mid-escrow

Sometimes the unpermitted work surprises everyone, including the seller. When it surfaces during the buyer's investigation, the buyer holding an active inspection contingency has three moves: ask you to legalize before closing, ask for a credit or price reduction, or cancel. You are not obligated to agree to anything, but you are negotiating with less leverage than you had before opening escrow, which is exactly why I push sellers to deal with this before listing. I covered how to respond to a buyer's repair request and what happens if the buyer walks in separate posts, and a pre-listing inspection is the cheapest way to make sure nothing in your own house surprises you.

Frequently Asked Questions

Do I have to disclose unpermitted work a previous owner did?

Yes, if you know about it. The Transfer Disclosure Statement asks about alterations made without permits, not about who made them. California courts have held sellers responsible for concealing known unpermitted work even when the work predated their ownership. When in doubt, disclose and talk to a real estate attorney.

Can I count unpermitted space in my home's square footage?

No. Unpermitted space generally cannot be marketed as living area, and appraisers typically exclude it from the appraised square footage. Your agent can describe it accurately in the listing, for example as a bonus room, without counting it in the advertised square footage.

How much does it cost to legalize unpermitted work in the South Bay?

It varies widely by city and by project. In the Los Angeles Building and Safety area, which covers San Pedro and Harbor City, fees commonly run $1,500 to $5,000 for single-trade work and $5,000 to $25,000 or more for structural additions, plus correction costs. Torrance, Redondo Beach, the Palos Verdes cities, and the beach cities each run their own building departments with their own fees and timelines, so start with a call to your city.

What is AB 2533 and does my unpermitted ADU qualify?

AB 2533 is a California law, effective in 2025, that requires cities to offer a legalization path for unpermitted accessory dwelling units and junior units built before January 1, 2020. Cities can only deny the application over genuine health and safety problems, cannot charge penalty fees, and must publish a checklist of required fixes. You also have the right to a confidential third-party inspection before applying.

Will unpermitted work stop my sale from closing?

Usually not, if it is disclosed and priced in from the start. Deals run into trouble when the work surfaces mid-escrow as a surprise, because the buyer then reopens negotiations or cancels under their inspection contingency. Some buyers' loan and appraisal processes treat unpermitted space conservatively, which is a question for the buyer's licensed lender. Disclosed early and priced correctly, unpermitted work is a factor, not a dealbreaker.

The bottom line

You can absolutely sell a South Bay house with unpermitted work. Sellers do it every month. The ones who do it well decide on a strategy before they list: legalize, remove, or disclose and price. The ones who get hurt are the ones who hope nobody notices.

If you are weighing that decision on your own house, start with the number. Request a free home valuation and I will show you what your home is worth as it stands, what it would be worth with the work permitted, and whether the gap is worth closing before you list.

About Ben Larson

Ben Larson leads Larson Realty Group, powered by Real Broker, serving the South Bay of Los Angeles. Licensed since 2006 with more than $100 million in closed sales, he specializes in listings across the Palos Verdes Peninsula and the beach cities, and works extensively with probate, trust, and inherited property sales. Reach him at https://larsonrealty.group. DRE #01746853.

This article is general information, not legal, tax, or lending advice. For disclosure and liability questions, talk to a California real estate attorney. For tax questions, talk to a CPA or tax attorney. For questions about how unpermitted work affects a buyer's financing, talk to a licensed lender. For permit requirements on a specific property, contact that city's building department.