Hiring a Licensed Pool Contractor in California

General information, not legal, engineering or insurance advice.

In California, contractors are licensed by the Contractors State License Board (CSLB). Here's what the C-53 Swimming Pool license covers, which other trades may be involved in a heater job, how to check a license, and what to put in writing before work starts. Rules change, so treat CSLB and the codes linked below as the authority.

The C-53 Swimming Pool classification

CSLB licenses contractors by classification. Under the board's regulations, a C-53 Swimming Pool contractor "constructs swimming pools, spas or hot tubs, including installation of solar heating equipment using those trades or skills necessary for such construction."¹ Every business in our directory holds a C-53 license, or a C-46 Solar or C-36 Plumbing license with a business name that clearly says pools, spas or heaters.

A C-53 license tells you the business is licensed for pool work. It doesn't tell you which heaters they install or service, so ask each contractor directly whether they work on the heater type and brand you want.

Other trades a heater job can involve

Many pool contractors hold several classifications, which our listings show. If a contractor plans to subcontract the gas line or electrical work, ask who will do it and check that person's license too. See CSLB's classification descriptions for the details.²

How to check a license on CSLB

1. Go to CSLB's Instant License Check on cslb.ca.gov.
2. Search by license number (shown on every listing here), business name or personnel name.
3. Check that the license status is current and active, and that the classifications include the work you're hiring for.
4. Review the bond and workers' compensation information on the record.
5. Make sure the business name and license number on your quote and contract match the license record.

California law requires contractors to include their license number on contracts, bids and advertising.³Every listing in our directory shows the license number, classifications and expiration date from CSLB's public license list, with a link to the lookup. Licenses can change at any time, so check again before you sign.

Permits

Requirements vary by city and county, so ask your local building department. Installing a new heater can involve building, electrical, plumbing or gas permits, and solar systems may need plumbing, building and electrical permits, typically with a final inspection.⁵ Your licensed contractor normally pulls the permit. Ask for the permit number, and don't make final payment until the final inspection passes.

Put it in a written contract

California's home improvement contract law, Business and Professions Code section 7159, sets out what a home improvement contract must contain, including specific provisions for swimming pool contracts.⁴ Whatever the size of the job, make sure your contract includes:

• The contractor's business name, CSLB license number and address.
• The heater make, model and output, and any pump, plumbing, electrical or gas work included.
• Who pulls which permits, and whether permit fees are included.
• Total price, payment schedule and start and completion dates.
• Manufacturer warranty and the contractor's labor warranty, in writing.
• Any notices the law requires, such as your right to cancel where it applies.

Deposits and payments

California limits the down payment a contractor can take on a home improvement or swimming pool contract, and payments after that should match the work completed.⁴ CSLB's consumer pages explain the current limits.

Liens and lien releases

Suppliers and subcontractors who aren't paid may be able to record a mechanics lien against your property, even if you paid your contractor. On larger jobs, ask for lien releases from the contractor and any subcontractors and suppliers before you make each payment, and keep copies.

A quick checklist

1. Get 2–3 written quotes for the same heater type and size.
2. Look up each license on CSLB's Instant License Check and confirm the classification fits the job.
3. Ask who handles electrical and gas work, and confirm their license.
4. Confirm who pulls the permit, and get the permit number.
5. Sign a written contract with model, price, schedule and warranty.
6. Keep deposits small and pay final only after inspection.

Sources

1. California Code of Regulations, Title 16, section 832.53, Class C-53 Swimming Pool Contractor, as published by CSLB.
2. Contractors State License Board, licensing classifications.
3. California Business and Professions Code, section 7030.5 (license number on contracts, bids and advertising).
4. California Business and Professions Code, section 7159 (home improvement contracts) and section 7159.5 (down payments and progress payments).
5. U.S. Department of Energy, “A Consumer’s Guide: Heat Your Water with the Sun” (December 2003).
6. Contractors State License Board, Instant License Check, and cslb.ca.gov.