AC Replacement Permits in Stockton: What California Requires

Permits and testing for a new AC in Stockton

Yes, you need a permit. California requires a permit and an independent test of the installed system whenever a central HVAC system is replaced. The contractor pulls the permit, registers the job and schedules the test; you should see both on the paperwork.

Updated October 29, 2026 · Sources listed at the end

What the state requires

CHEERS, a California provider registry for the independent raters who test HVAC installs, puts it plainly: a permit and independent testing are required when you change your home's HVAC system. The contractor gets the permit from the local building department, registers the project, and schedules a rater to test the system after it is installed. CHEERS now calls them ECC raters (Energy Code Compliance); older paperwork calls them HERS raters.

The test exists because ducts leak. CHEERS says the average California home system leaks 30% of its conditioned air into places other than the living space. A rater measures it, and if the ducts leak too much they have to be sealed before the job passes.

Where the permit comes from

City of Stockton: the Permit Center, 501 W. Weber Ave, Building 2, First Floor, Stockton. Its permit technicians answer at (209) 937-8561. The city's online portal handles fees and inspections, and some permit types.
The other cities in the county each have their own building department.
Unincorporated areas like Morada and French Camp go through San Joaquin County's Community Development Department. If you aren't sure which office covers your address, the contractor will know.

You normally don't pull the permit yourself. A licensed C-20 contractor does it as part of the job, and the cost should be in the quote.

Why it is worth the trouble

The test catches leaky ducts, which waste money every summer.
A permitted job is on record when you sell the house.
Permitted work has to be done by a licensed contractor. California requires a license for any job that needs a permit, whatever the price.

A contractor who offers a discount to skip the permit is offering to skip all three.

What to ask before you sign

Is the permit included in the price, and who pulls it?
Who schedules the field test, and is any duct sealing it requires included?
What is your CSLB license number? (Look it up on cslb.ca.gov.)
Will I get copies of the final permit sign-off and the test results?

A California tract neighborhood seen from above, with rows of roofs and streets — A California tract neighborhood from above (this one is in Orange County). Many Stockton-area subdivisions from the 1990s and 2000s look much the same, and so do their aging systems. Photo: Neal E. Johnson / Unsplash

Questions Stockton homeowners ask

Do I need a permit to replace my AC in Stockton?

Yes. California requires a permit and an independent test when an HVAC system is replaced. In the city of Stockton the permit comes from the Permit Center; other cities and the county have their own building departments.

What is a HERS or ECC test?

An independent rater checks the installed system, including duct leakage, to confirm it meets California's Energy Code. The contractor schedules it after installation.

Does a repair need a permit?

Most repairs, like a capacitor or fan motor, don't. Replacing the system or its major components does. Ask the contractor if you are unsure.