For pool enclosures constructed or modified under the applicable requirements, San Diego County materials identify a minimum 5-foot barrier. County guidance also specifies that the enclosure should be designed so it cannot be readily climbed by small children. For a specific property, the applicable current requirements should be confirmed with the authority having jurisdiction.

San Diego County guidance identifies a maximum opening of 4 inches for applicable pool enclosure barriers. The County's enclosure guidance also addresses the clearance between the bottom of the fence and the ground and requirements intended to prevent climbing. These details are important when selecting and planning a pool fence because the overall barrier must be designed to restrict access to the swimming pool.

Applicable San Diego County pool enclosure requirements address the operation and security of pool gates and doors. County guidance identifies requirements including: Self-closing gates Self-latching devices Gates opening outward away from the pool Secure gate construction Appropriate latch and opening hardware Emergency egress provisions where applicable The exact requirements can depend on the type of pool and property.

San Diego County's current 2026 pool and spa requirements identify additional safety features that may be required along with the pool enclosure. The County specifically identifies accepted safety features including options such as: Removable mesh fencing Approved safety pool covers Door and window alarms Self-closing and self-latching devices Pool alarms Other qualifying safety features The County states that the required combination depends on the applicable County and California requirements for the project.

Removable mesh fencing is specifically addressed in San Diego County's pool safety requirements. For applicable projects, the mesh fencing system must satisfy the requirements applicable to the selected safety feature and pool configuration. San Diego County materials also recognize ASTM standards in connection with removable mesh fencing and pool safety requirements.

The City of San Diego has its own municipal building and development regulations in addition to the California Building Standards Code. The City currently identifies the 2025 California Building Standards Code as effective for projects submitted on or after January 1, 2026, with local amendments addressed through the San Diego Municipal Code. San Diego's current code materials address swimming-pool drowning-prevention measures, including enclosure and other qualifying safety features. Because City of San Diego requirements can differ from requirements administered by San Diego County for unincorporated properties, homeowners should verify the requirements applicable to their specific property.

San Diego County includes incorporated cities as well as unincorporated communities. This distinction is particularly important for pool fence requirements. The County of San Diego's current pool and spa requirements apply to specified new or modified pools and spas in the unincorporated County, while incorporated cities such as the City of San Diego may administer their own building and development requirements. For this reason, homeowners should confirm the requirements with the authority having jurisdiction (AHJ) for the property before selecting a final pool fence configuration.