Benton County, WA Swimming Pools & Spas: Fencing & Safety Requirements (2026)
Key Facts
- Minimum Height
- 48 inches above grade
- Openings
- No 4-inch sphere passes
- Ground Gap
- 2 inches over grass
- Gates
- Self-closing, self-latching
- Code
- 2021 ISPSC (WAC 51-51)
Summary
A residential pool, spa, or hot tub in unincorporated Benton County must be enclosed by a barrier at least 48 inches high, with no opening a 4-inch sphere can pass and gates that self-close and self-latch, under the 2021 ISPSC adopted through WAC 51-51.
The top of the barrier shall be not less than 48 inches (1219 mm) above grade where measured on the side of the barrier that faces away from the pool or spa.
Full Breakdown
Benton County enforces the barrier rules of the 2021 International Swimming Pool and Spa Code, referenced by Section R327 of the state building code (WAC 51-51). The barrier must stand at least 48 inches above grade measured on the side facing away from the pool, with the gap under it no more than 2 inches over grass or gravel. Openings must not pass a 4-inch sphere, and there can be no climbable handholds or footholds. Pedestrian gates must open away from the pool, self-close, and self-latch, with the release at least 54 inches high or shielded on the pool side. A dwelling wall may form part of the barrier with alarmed or self-closing doors.
Violations & Fines
A barrier under 48 inches, an opening a 4-inch sphere passes through, or a gate that is not self-closing and self-latching fails inspection, and the pool may not be used until corrected.
Frequently Asked Questions
How tall must a pool fence be?
Can my house wall count as the barrier?
Sources & Official References
Other rules in Benton County
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