Pool fence regulations are more consistent than you think.

Yes, local codes vary, but the core safety requirements are pretty standard across the US. Most jurisdictions follow the International Swimming Pool and Spa Code (ISPSC) or similar guidelines.

The basics: fence at least four feet tall (some areas say 48 inches minimum). Gaps no bigger than four inches — so a toddler can’t squeeze through. No horizontal rails or climbable features on the outside. Gates must self-close and self-latch, with the latch out of a child’s reach (usually 54 inches from ground or on the pool side). Some places also require a secondary barrier like a pool cover or door alarm.

Don’t trust my memory. Call your local building department. They’ll tell you exactly what applies in your town. One wrong measurement could mean a failed inspection or worse.