This question comes up on almost every resurfacing project. The honest answer: whether a replaster alone needs a building permit depends on the city and on what else is being changed. What doesn't vary is the state safety rule that applies when a permit is issued. This is general information, not legal advice. Confirm with your building department before work starts.
Does replastering need a permit?
Cities treat a straight replaster (same shape, same finish type) differently from a remodel that changes the shell, the plumbing, the equipment's gas or electrical supply, or the deck. The more the project changes, the more likely a permit is required. Who to ask:
| Where the pool is | Who handles building permits |
|---|---|
| Brentwood | City of Brentwood building division |
| Oakley | City of Oakley building division |
| Antioch | City of Antioch building division |
| Discovery Bay, Byron, Knightsen, Bethel Island | Contra Costa County (unincorporated areas) |
A contractor who works locally should know what the city expects for the scope you're planning. Ask them directly whether they'll pull a permit and who is responsible for inspections.
The SB 442 safety-feature rule
California's Swimming Pool Safety Act was updated by SB 442, effective January 1, 2018. When a building permit is issued for constructing a new pool or spa, or remodeling an existing one, at a private single-family home, the pool must be equipped with at least two of seven drowning-prevention safety features:
- An enclosure that isolates the pool or spa from the home.
- Removable mesh fencing with a self-closing, self-latching gate that can accept a key lock.
- An approved safety pool cover.
- Exit alarms on the home's doors that give direct access to the pool or spa.
- A self-closing, self-latching device on those doors, with the release at least 54 inches above the floor.
- An alarm that sounds when someone accidentally or without authorization enters the water.
- Other means of protection at least as effective as the options above.
The same law requires a home inspection done during a sale of a home with a pool or spa to note which of these features the pool has. That's one reason buyers often order a dedicated pool inspection.
Draining for a replaster
Resurfacing means draining the pool. Chlorinated pool water generally shouldn't go into a street storm drain, and cities have rules about where and how to discharge it. Ask the contractor how they'll drain the pool and confirm with the city. In low-lying areas near the Delta, such as parts of Discovery Bay, groundwater can make draining risky, so leave that to the contractor.
Plan the whole job at once
If the pool will be empty anyway, it's the cheapest time to replace waterline tile, fix cracks and leaks, and update drain covers. See pool resurfacing for the process and typical costs, and pool tile repair.
Frequently asked questions
Do you need a permit to resurface a pool in California?
It depends on the city and the scope. A like-for-like replaster may be treated differently from a remodel. Check with the building department for the city (or the county, in unincorporated areas).
What does SB 442 require?
When a permit is issued to build or remodel a pool or spa at a single-family home, at least two of seven listed drowning-prevention features are required. Home inspections at sale must note which features the pool has.
Who handles pool permits in Discovery Bay?
Discovery Bay is unincorporated, so building permits generally go through Contra Costa County.
Cost ranges and legal notes on this page are general information, not a quote or legal advice. Prices vary by job; get a written quote for your pool.