California · Penalties in every state · What needs no permit here

Building without a permit in California

By Mario Bailey Last checked · 3 official sources

Quick answer

California makes it a criminal misdemeanor to violate the State Housing Law or the State Building Standards Code provisions adopted under it, which covers construction, alteration, or maintenance of a building without required permits. The state ceiling is a fine up to $1,000, up to six months in jail, or both.

Source: Health & Safety Code 17995; Health & Safety Code 17960; Business & Professions Code 7031.5. Details and the official text are cited below.

What California law says

California makes it a criminal misdemeanor to violate the State Housing Law or the State Building Standards Code provisions adopted under it, which covers construction, alteration, or maintenance of a building without required permits. The state ceiling is a fine up to $1,000, up to six months in jail, or both. Enforcement is local: the building department of every city or county enforces the State Building Standards Code within its own jurisdiction, so most cities and counties also layer their own municipal-code penalty on top of the state misdemeanor. Permit applicants face a separate, smaller exposure too: anyone who files a false or missing contractor-license statement on a permit application is subject to a $500 civil penalty.

Cited from Health & Safety Code 17995; Health & Safety Code 17960; Business & Professions Code 7031.5: official text. Localities enforce these rules and may add their own fees and procedures on top.

Can you get a permit after the work is done?

California has no separate statewide as-built or retroactive-permit statute. Instead, Health and Safety Code 17980 sets the abatement process a local enforcement agency must follow once it finds a building built, altered, or maintained in violation of adopted building standards, which reaches unpermitted work discovered after the fact. The agency must give 30 days notice to abate, or a shorter notice if there is an immediate health or safety threat, before it can start a court action. Once a building is found substandard, the agency must move to abate it by repair, rehabilitation, vacation, or demolition, and the owner gets to choose repair over demolition unless the repair is not completed on the required schedule. Agencies must prefer repair over demolition when it is economically feasible without requiring more than 75% of the dwelling to be repaired. The actual permit fee and any penalty multiplier charged for work done without a permit is set by local ordinance, not by state statute.

Cited from Health & Safety Code 17980(a); 17980(c)(1)-(2): official text.

The typical path, whatever your locality calls it: stop any ongoing work, contact the permit office before they contact you, apply for the permit describing what was actually built, and expect the office to require opening up or inspecting concealed work. Voluntarily coming forward generally goes better than waiting for a complaint or a sale to surface it.

What California permit offices charge when work starts first

The statute above sets the ceiling; the bill comes from the local office. 2 California jurisdictions we cover publish a specific surcharge for work started before the permit, quoted here from the fee schedule or permit page we verified, each linked to the page that carries the citation.

Jurisdictions not listed either publish no surcharge clause or publish one we could not quote from an official schedule; their permit pages state what we could verify.

Who can pull the permit

California exempts an owner-builder from contractor licensing when the owner personally performs the work, or uses only wage employees, on their own property and does not intend the improvements for sale. A homeowner may also directly hire licensed trade contractors for up to four single-family residences a year, or improve their own principal residence without a general contractor's license, as long as they have actually lived there for the 12 months before the work is finished. Selling a self-built structure within one year of completion creates a rebuttable presumption that it was built for sale, which defeats the exemption, and selling five or more structures within a year makes that presumption conclusive. Separately, every city or county that requires a building permit must also require the applicant to file a signed statement giving their contractor license number or the basis of their claimed exemption; a false or missing statement carries a $500 civil penalty.

Cited from Business & Professions Code 7044(a)-(b); Business & Professions Code 7031.5: official text.

Was a permit needed in the first place?

Not every project needs one. Across the 14 California jurisdictions we have verified, 0 answered rules need no permit at all and 60 turn on a size or scope condition the jurisdiction publishes. If the work falls under one of those, the question changes from penalties to paperwork.

What you can build without a permit in California, jurisdiction by jurisdiction

Selling or buying in California?

How California compares: building without a permit, state by state.

See which parts of the work needed a permit, then send us the details

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From the Library

Your local permit office

Enforcement, after-the-fact fees, and the exact fix-it process are local. We cover these California permit offices:

Official sources

This page summarizes state law from the official sources listed above, with a last checked date. It is not legal advice. Penalties and procedures are applied by local offices and courts case by case; for anything contested or high stakes, confirm with your permit office or a licensed professional in California.