How Costa Mesa Handles Swimming Pools & Spas: A Practical Guide

Costa Mesa maintains 105 local ordinances across all categories, and 4 of those deal specifically with swimming pools & spas. Here is a breakdown of what the city actually requires, what is prohibited, and where Costa Mesa falls on the strict-to-permissive spectrum compared to other cities.

Above-Ground Pools

Costa Mesa applies California's Swimming Pool Safety Act (Health & Safety Code 115920-115929) and the 2022 California Residential Code through CMMC Title 5. Any above-ground pool capable of holding more than 18 inches of water requires a building permit, an isolation barrier at least 60 inches tall, and at least two of seven approved drowning-prevention features.

Key details: State Authority: Cal. Health & Safety Code 115920-115929. City Adoption: CMMC Title 5 (Building Code). Permit Trigger: Pool capable of holding >18 inches of water (HSC 115921). Required Features: At least 2 of 7 approved (HSC 115922). Min Barrier Height: 60 inches (HSC 115923).

Installing an above-ground pool over 18 inches deep without a permit, or failing the 60-inch barrier or two-of-seven feature requirements, fails inspection and can support a stop-work order or correction notice from Costa Mesa Code Enforcement.

Compared to other cities, Costa Mesa takes a harder line on above-ground pools. The enforcement and penalty structure reflects that.

Pool Permits

Costa Mesa requires plan review, permits, and inspections for swimming pool enclosures. In-ground pool permits may be issued at the counter in most cases. Building permits and electrical permits are required. Pools must meet California Building Code setback and safety standards.

Key details: Permit Required: Yes — building and electrical. Counter Permit: In-ground may be issued at counter. Above-Ground Exempt: <18 in deep, <5,000 gal. Safety Act: CA HSC §115920 compliance. Contact: Building Division — (714) 754-5273.

Building a pool without permits results in stop-work orders, required inspections, potential removal, and fines. Unpermitted pools may affect property sales and insurance.

Safety Rules

Costa Mesa enforces the California Swimming Pool Safety Act requiring VGB-compliant drain covers, GFCI electrical protection, and multiple safety features. Pool owners must maintain all safety devices in working condition at all times.

Key details: Drain Covers: VGB Act compliant required. Electrical: GFCI protection required. Maintenance: All features must stay functional. Inspections: During permitting process. Disclosure: Required during property sales.

Pool safety violations result in orders to close the pool until compliance, fines, and potential liability for injuries. Non-compliant drain covers may trigger state enforcement.

This is one of the stricter rules in Costa Mesa's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

Fencing Requirements

Costa Mesa requires a minimum 5-foot pool barrier and at least two additional safety features under the California Swimming Pool Safety Act. Pool barriers must be maintained per California Building Code requirements.

Key details: Barrier Height: Minimum 5 feet. Safety Features: 2 additional features required. Gate Standard: Self-closing, self-latching, lockable. Material Limits: Zone-specific fence standards apply. Governing Law: CA HSC §115920 et seq..

Pool barrier violations are serious safety issues enforced through building inspections and Code Enforcement. Non-compliance may result in pool closure orders and fines.

Compared to other cities, Costa Mesa takes a harder line on fencing requirements. The enforcement and penalty structure reflects that.

The Bottom Line

Costa Mesa is tougher than many cities when it comes to swimming pools & spas. Out of the 4 rules covered here, 3 are rated strict. If you are a homeowner, renter, or business owner in Costa Mesa, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.

All of the above reflects Costa Mesa's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.