Guides / Pools · Updated
Pool fence requirements
From the U.S. Consumer Product Safety Commission's Safety Barrier Guidelines for Residential Pools (Pub. 362, April 2023). Your local code has the final say and may be stricter.
Short answer
At least 48 in tall, no gap over 4 in at the bottom, no opening a 4 in ball can pass, and gates that open away from the pool, close and latch by themselves, with the latch out of a child's reach. Some places require 60 in.
Checklist
| Height | "The top of the barrier should be at least 48 inches above the surface." Some states, counties and towns require 60 inches. |
|---|---|
| Gap at the bottom | No more than 4 in over a solid surface, 2 in over grass or gravel, 1 in under a removable mesh fence. |
| Openings | "Openings in the barrier should not allow passage of a 4-inch diameter sphere." |
| Horizontal rails | If they're less than 45 in apart, put them on the pool side so they can't be climbed, and keep vertical pickets 1¾ in apart or less. |
| Chain link | Mesh no bigger than 1¼ in square, unless slats bring the openings down to 1¾ in. Lattice openings 1¾ in or less. |
| Gates | Open outward, away from the pool, self-closing and self-latching. If the latch release is under 54 in from the bottom of the gate, it goes on the pool side at least 3 in below the top, with no opening over ½ in within 18 in of it. |
| House as one side | Doors to the pool area need an alarm (UL 2017) that sounds for at least 30 seconds, at least 85 dB at 10 ft, with a reset at least 54 in up; or a power safety cover meeting ASTM F1346-91. |
| Above-ground pools | Where a barrier sits on top of the pool wall, the gap between them should be 4 in or less. |
The guidelines are recommendations; states and towns write the actual rules. Ask your building department before you build.
Building the fence? The fence calculator counts posts and panels. Keep the water right with thepool water balance calculator, and size a heater with the pool heater calculator.
Source: CPSC Pub. 362, Safety Barrier Guidelines for Residential Pools (2023).
Some states go higher
| Where | Minimum height | Rule |
|---|---|---|
| California | 60 in | Health and Safety Code 115923(b): "A minimum height of 60 inches" |
| Arizona | 60 in (4 ft between house and pool) | A.R.S. 36-1681: "at least a five foot wall, fence or other barrier"; cities with their own equal or stricter ordinance are exempt |
| Maricopa County, AZ | 60 in | "Top of barrier shall be at 60" above finished grade on exterior side" |
| Florida | 48 in | Fla. Stat. 515.29: "The barrier must be at least 4 feet high on the outside." |
| New York | 48 in | 2020 Residential Code R326.4.2: a 48-inch height (NY Department of State) |
| Washington | 48 in | WAC 51-51 adopts the 2021 International Swimming Pool and Spa Code for single-family pools; Spokane Valley: "at a minimum, 48" (4 feet) above grade" |
Cities and counties often add their own rules on top, so check with yours.