California permit requirements

We have read and dated 153 permit rules across 15 jurisdictions in California. They do not all say the same thing: patio thresholds alone run from 120 to 300 sq ft across 5 of them.

Jurisdictions: 15
Verified rules: 153
Permit always required: 86
Depends on the project: 66

Do you need a building permit in California?

Usually yes, but not from California itself: permits are issued by the city or county, not the state, so the rule that governs your project is the one your own jurisdiction publishes. 86 of those local rules require a permit outright, 66 depend on a size or scope condition the office publishes, and 0 need none. California sets the building code those local rules derive from; your city or county sets the threshold and the fee.

How permitting works in California

By Mario Bailey Last checked 28 Sep 2026 · 4 official sources

Who writes the code, and who enforces it

California’s residential rules run through the California Residential Code (CRC), Title 24, Part 2.5, based on the International Residential Code, with California amendments. The California Building Standards Commission (BSC) oversees development, adoption, and publication of the state’s building codes; the current edition of Title 24, the 2025 California Building Standards Code, took effect Jan. 1, 2026. Every county and city we track enforces it through its own building department.

What the state decides for everyone

Two statewide rules reach every California address. Business and Professions Code section 7044 exempts an owner who personally performs the work, or uses only wage employees, and does not intend it for sale, from needing a contractor’s license, or lets them improve their principal residence without one if, among other conditions, they have lived there for the 12 months before the work is completed. Section 7031.5 separately requires every city or county that requires a permit to collect a signed statement from each permit applicant giving their contractor license number or claimed exemption, with a civil penalty of up to $500 for a false or missing one.

What your county or city decides

Cities and counties may adopt local amendments, and each publishes its own thresholds and fees, which is why the 15 California jurisdictions we track can require the identical permit and still charge it differently. See what you can build without a permit in California for how each jurisdiction’s published exemptions and size thresholds compare.

If work was done without a permit

Health and Safety Code section 17995 makes violating the State Housing Law, or the building standards published under it, a misdemeanor, which covers building or altering without a required permit: a fine up to $1,000, up to six months in jail, or both. Most cities and counties add a municipal penalty on top. California has no separate statewide retroactive-permit statute; once an agency finds a building in violation, section 17980 requires 30 days’ notice to abate, or less for an immediate health or safety threat, before acting. If the agency finds the building substandard, the owner may choose repair or demolition, and the agency must prefer repair when economically feasible without repairing more than 75% of the dwelling. Any fee for work done without a permit is set locally. See penalties for building without a permit in California for the full citations.

California Building Standards Commission, current (2025) California Building Standards Code, Title 24, and its effective date, read 28 Sep 2026
Health and Safety Code section 17995, the State Housing Law misdemeanor penalty, read 28 Sep 2026
Health and Safety Code section 17980, the abatement process for a building found in violation, read 28 Sep 2026
Business and Professions Code section 7044, the owner-builder exemption from contractor licensing, read 28 Sep 2026

Do California jurisdictions agree?

Every row below is a measurement at least two California jurisdictions publish, compared against each other. This is the question a statewide answer cannot settle, because the number that governs your project is the one your own city or county publishes.

Project	Published threshold	Jurisdictions	Agreement
Patio	120 to 300 sq ft	5	3 different numbers
Deck	120 to 200 sq ft	7	2 different numbers
Pool	18 to 24 inches	8	2 different numbers
Fence	6 to 7 feet	15	2 different numbers
Shed	120 sq ft	15	Same number in all 15
Deck	30 inches	5	Same number in all 5
Roof Replacement	25 percent	2	Same number in all 2
Pool	5,000 gallons	2	Same number in all 2

4 of 8 comparable measurements are uniform across California; 4 are not. Latest verification 2026-10-30.

Where California jurisdictions split

The verdict for each project across the 15 California jurisdictions we cover. On 4 of 13 projects they do not give the same answer, which is why a statewide answer is not one.

Project	Permit required	Depends	Across the state
Deck	3	12	Answer varies
Pool	5	10	Answer varies
Roof Replacement	10	5	Answer varies
Patio	6	8	Answer varies
Electrical	15		Same answer everywhere
Fence		15	Same answer everywhere
HVAC	15		Same answer everywhere
Plumbing	15		Same answer everywhere
Shed		15	Same answer everywhere
Solar	15		Same answer everywhere
Bathroom Remodel	1		Same answer everywhere
EV Charger		1	Same answer everywhere
Water Heater	1		Same answer everywhere

Building without a permit in California

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.

Penalties, the as-built path, and what the statute actually says

What you can build without a permit in California

0 of the 152 answered rules across California need no permit at all and 66 turn on a size or scope condition the jurisdiction publishes, by project and jurisdiction, in each office's own words.

The exemptions and conditions, jurisdiction by jurisdiction

What a permit costs in California

There is no single California permit fee. Each jurisdiction in California sets and publishes its own, and they do not use the same pricing model, so the figure that applies to your project is the one your own city or county publishes. Below is every California project where we have quoted one, verbatim, from the office's own schedule.

Project in California	Jurisdictions publishing a fee
Deck	14
Electrical	14
HVAC	14
Plumbing	14
Pool	14
Roof Replacement	14
Shed	14
Fence	13
Patio	13
Solar	13

Each row links to the California table carrying every quoted fee, its source and its verification date. We do not publish a California average: the notes mix flat minimums, valuation percentages and per-fixture charges, so an average would be a number no office charges.

Building code in California

California Residential Code (CRC), Title 24, Part 2.5. Based on the International Residential Code (IRC), with California amendments.

Administered by California Building Standards Commission (BSC). Official source

Cities and counties may adopt local amendments. Confirm the current edition with the jurisdiction.

Most local permit thresholds derive from this code. See our sources and standards.

What each California jurisdiction publishes

One line per jurisdiction, written from its own rules rather than from a state summary. This is the section that used to be a list of links, and the states with the fewest jurisdictions to compare are the ones it says the most about.

Alameda County 10 rules
4 of 10 projects always need a permit and 6 turn on the size or scope of the work. Published thresholds include deck at 30 inches and fence at 7 feet.
Contra Costa County 10 rules
5 of 10 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, fence, patio, pool and shed. Published thresholds include deck at 200 sq ft and fence at 7 feet.
Fresno County 10 rules
7 of 10 projects always need a permit and 3 turn on the size or scope of the work. The ones that depend on the project are fence, pool and shed. Published thresholds include fence at 7 feet and pool at 24 inches.
Los Angeles 10 rules
8 of 10 projects always need a permit and 2 turn on the size or scope of the work. The ones that depend on the project are fence and shed. Published thresholds include fence at 6 feet and shed at 120 sq ft.
Los Angeles County 10 rules
5 of 10 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, fence, patio, pool and shed. Published thresholds include fence at 6 feet and pool at 18 inches.
Orange County 10 rules
8 of 10 projects always need a permit and 2 turn on the size or scope of the work. The ones that depend on the project are fence and shed. Published thresholds include fence at 6 feet and shed at 120 sq ft.
Riverside County 10 rules
5 of 10 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, fence, pool, roof replacement and shed. Published thresholds include deck at 200 sq ft and fence at 7 feet.
Sacramento 10 rules
5 of 10 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, fence, patio, roof replacement and shed. Published thresholds include deck at 30 inches and fence at 7 feet.
Sacramento County 10 rules
5 of 10 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, fence, patio, pool and shed. Published thresholds include patio at 200 sq ft and pool at 18 inches.
San Bernardino County 10 rules
7 of 10 projects always need a permit and 3 turn on the size or scope of the work. The ones that depend on the project are deck, fence and shed. Published thresholds include deck at 120 sq ft and fence at 6 feet.
San Diego 10 rules
4 of 10 projects always need a permit and 6 turn on the size or scope of the work. Published thresholds include patio at 300 sq ft and deck at 200 sq ft.
San Diego County 10 rules
5 of 10 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, fence, patio, pool and shed. Published thresholds include fence at 6 feet and patio at 300 sq ft.
San Francisco 13 rules
6 of 12 projects always need a permit and 6 turn on the size or scope of the work. Published thresholds include fence at 6 feet and deck at 30 inches. 1 question is unresolved because the jurisdiction publishes no answer.
San Jose 10 rules
7 of 10 projects always need a permit and 3 turn on the size or scope of the work. The ones that depend on the project are deck, fence and shed. Published thresholds include deck at 200 sq ft and fence at 7 feet.
Santa Clara County 10 rules
5 of 10 projects always need a permit and 5 turn on the size or scope of the work. The ones that depend on the project are deck, fence, patio, pool and shed. Published thresholds include deck at 200 sq ft and fence at 7 feet.