Whether you must register a vacant house depends on the city or county it sits in. We found no California statute that makes every owner of an empty house register it; registration, where it exists, comes from a local ordinance with its own trigger, fee and upkeep standards. State law does set maintenance and notice rules for vacant houses tied to a foreclosure. The reliable step is to ask your city's code enforcement office whether it has a vacant property registry, what triggers it, and whether it applies to your house.
This guide lists what California law does say about vacant houses, the questions to put to your city, what we could and could not confirm for the places we work as of November 6, 2026, and how registration fits into the decision to hold, list or sell. It is not legal advice.
What California law says about vacant houses
Four state statutes speak to empty houses. None of them is a registration rule, but each shapes what a city can do and what a vacant house costs to keep.
Foreclosed vacant houses: Civil Code sections 2929.3 and 2929.4
Section 2929.3 requires the legal owner of vacant residential property bought at a foreclosure sale, or acquired through foreclosure, to maintain it. "Failure to maintain" means failing to care for the exterior, including excessive foliage growth, failing to act against trespassers or squatters, and letting standing water breed mosquito larvae. Before fining, the city must mail a notice describing the conditions and give the owner time to start and finish the fix; the statute caps the fine at two thousand dollars a day for the first 30 days and five thousand a day after that. The section does not override local ordinances, but a city cannot fine the same owner under both. Section 2929.4 adds that before fining an owner for failing to maintain a vacant property that is subject to a notice of default, or was bought or acquired through foreclosure, the city must give notice of the violation and a chance to correct it, unless a condition threatens public health or safety.
If your house has a notice of default recorded against it, that second rule applies to you. The lender, a HUD-approved housing counselor and the options when you are behind on payments come before any registration question.
Buildings that become substandard: Health and Safety Code section 17980
For a building in violation, the enforcement agency gives 30 days' notice to abate before it acts, or less where there is an immediate threat. A buyer who purchased a residential property foreclosed on or after January 1, 2008 and is diligently abating violations gets at least 60 days after taking title before the agency starts an action, unless the agency finds an immediate threat.
Long-vacant houses that are cited: Revenue and Taxation Code section 17274
A dwelling unoccupied or abandoned for at least 90 days, cited for a serious violation that threatens public health and safety and not brought into compliance within the period the statute sets, can be classed as substandard housing. The agency then mails a notice of noncompliance, notifies the Franchise Tax Board and records the notice with the county recorder. The section denies certain state income tax deductions for that housing, and the denial reaches a later owner who takes title after recording until a notice of compliance is recorded. Ask a tax professional what it means for you.
Insurance after 60 days
The standard California fire policy lets an insurer limit coverage once a building has been vacant or unoccupied beyond 60 consecutive days unless the policy says otherwise. That is covered in insuring a vacant house, and it is often the first cost an owner notices.
The questions to ask your city
Call the office that handles code enforcement and ask, in this order:
- Does the city have a vacant property or vacant building registration ordinance, and what is its code section?
- What makes a house "vacant" under it: a number of days empty, a foreclosure filing, a boarded opening, a code case?
- Who must register: the owner, a lender, a property manager?
- Does it require a local contact who can respond to a problem at the house?
- What upkeep and security standards apply: yard, pool, locks, boarding, signage?
- Is there a registration or inspection fee, and is it charged again each year?
- What happens if a house that should be registered is not?
- Does registration end when the house sells, and does the buyer have to register?
Write down the name of the person you spoke with and the date. If the answer is that no registry exists, the city's ordinary property maintenance code still applies to the empty house, which is where most vacant-house notices come from; code enforcement notices: what they mean reads them one by one.
Check your city: what we could confirm
We tried each office's own page on November 6, 2026. This table reports only what those pages said, or that a page would not open. It is a starting point for your call, not a summary of any ordinance.
JurisdictionOffice to askWhat its own page showed
Pomona
Code Compliance Division, Development Services
The division's pages refused automated reading, so we could not confirm whether Pomona registers vacant houses or on what terms. Check your city.
Ontario
Community Improvement Department
Describes residential inspections, systematic rental inspections, weed and refuse abatement and weed control on vacant lots. No registration program is described on that page. Ask.
Unincorporated San Bernardino County, such as San Antonio Heights above Upland
Land Use Services, Code Enforcement
Its code enforcement and programs pages list complaints, citations, appeals and community programs. No vacant registration program is described on those pages. Ask.
Any other city
The department named on your notice, or the city's code enforcement office
Check your city. Its municipal code is usually posted on its website.
Two lines matter more than the table. First, the mailing address is not the rule-maker: a San Antonio Heights house has an Upland address but sits in unincorporated San Bernardino County, so its code questions go to the county, as the Upland page explains. Second, in Pomona's Lincoln Park, Wilton Heights and Hacienda Park historic districts, exterior work goes through the city's historic preservation process, so a boarding or fencing requirement on a vacant Victorian may need more than a contractor. The Pomona page and the Ontario page list each city's other rules.
How registration fits the hold, list or sell decision
Registration is one more line in the monthly cost of keeping a house empty. If your city charges a fee or requires a contact, regular inspections or security work, add it to the holding-cost worksheet in the vacant and cited house guide, next to the loan, taxes, vacancy insurance, utilities and yard care.
LineHolding the houseListing itSelling as-is for cash
Registration fee, if any
-
-
Stops at closing
Upkeep and security the city requires
-
-
Stops at closing
Other holding costs per month
-
-
Stops at closing
Months carried
-
-
To closing
Every house we walk gets two written numbers: an as-is cash offer and an open-market read, each with the comparable sales, the deductions and the net. The open-market read is a preliminary estimate, not an appraisal. Listing usually nets more when the house is sound, insurable and shows well once the utilities are on, and you can carry it for the months a sale takes. When that net is higher, the written recommendation says so and you are introduced to a designated local expert, an independently licensed California agent.
What this looks like in practice
These are the kinds of files that come in, described without names or figures.
- A Pomona house left empty after a parent moved into care, where the family's first contact with the city was a code notice for an open window.
- A San Antonio Heights house whose owner called the City of Upland about vacancy rules and was sent to the county.
- An inherited Ontario house with a recorded notice of default, where the owner needed the lender, a housing counselor and both numbers before deciding.
The whole series is in vacant houses and code violations. To price the house as it stands, send the address and anything the city has sent you through the vacant house and code violation page, or call (909) 498-3977. There is no cost and no obligation to get the two numbers and the written report.
Sources
- California Civil Code section 2929.3 (maintenance of vacant foreclosed residential property; fines and notice): leginfo.legislature.ca.gov, accessed November 6, 2026
- California Civil Code section 2929.4 (notice and chance to correct before fines on vacant property in default or foreclosure): leginfo.legislature.ca.gov, accessed November 6, 2026
- California Health and Safety Code section 17980 (notice to abate; time for buyers of foreclosed property): leginfo.legislature.ca.gov, accessed November 6, 2026
- California Revenue and Taxation Code section 17274 (substandard housing, including dwellings unoccupied 90 days): leginfo.legislature.ca.gov, accessed November 6, 2026
- California Insurance Code section 2071 (standard fire policy, vacancy beyond 60 days): leginfo.legislature.ca.gov, accessed November 6, 2026
- City of Ontario, Community Improvement: ontarioca.gov, accessed November 6, 2026
- San Bernardino County Land Use Services, Code Enforcement: lus.sbcounty.gov, accessed November 6, 2026
- San Bernardino County Land Use Services, Code Enforcement Programs: lus.sbcounty.gov, accessed November 6, 2026
Mr. Cali Offers is not a law firm; confirm any registration rule with your city or county and your own attorney. Cash offers come from independent buyers and investors who buy for their own account and may resell for profit; a cash offer is generally below what the open market would bring. Any value shown is a preliminary estimate, not an appraisal. Nothing here is legal, tax or financial advice.
Frequently asked questions
Do I have to register a vacant house in California?
Only if your city or county has a vacant property registration ordinance that covers your house. We found no California statute that requires every owner of an empty house to register it. State law does set maintenance and notice rules for vacant houses tied to a notice of default or a foreclosure. Ask your city's code enforcement office whether a registry exists and applies to you.
Who is responsible for a vacant house after foreclosure?
Civil Code section 2929.3 requires the legal owner of vacant residential property bought at a foreclosure sale, or acquired through foreclosure, to maintain its exterior, act against trespassers and prevent standing water that breeds mosquitoes. A city must give written notice and time to fix the conditions before it fines that owner.
What happens to a vacant house registration when the house sells?
That depends on the city's ordinance. Ask the code enforcement office whether registration ends at transfer, whether the buyer must register, and what notice the city wants. Tell the buyer in writing about any registration and any open code case.
How long can a house sit empty before rules change?
Several state rules use time. The standard California fire policy can limit coverage once a building has been vacant beyond 60 consecutive days unless the policy says otherwise, and Revenue and Taxation Code section 17274 treats a dwelling unoccupied for at least 90 days that is cited for a serious violation and not corrected as substandard housing. Local registration triggers vary by city.
Written by
Anthony Grynchal
Anthony Grynchal is a California real estate salesperson with eXp Realty, licensed since November 2009 (CA DRE #01873626), and the owner of Mr. Cali Offers.
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