Swimming pool permit rules in Washington County, OR — also covering above-ground pools, in-ground pools, and spa installations — set fencing, barrier, alarm, and inspection requirements.
Building permits are required for swimming pools, spas, and permanent hot tubs in Washington County under the Oregon Residential Specialty Code and OAR 918-480. The county Building Services Division issues permits for unincorporated areas; cities handle their own jurisdictions.
Washington County Building Services issues residential pool and spa permits for unincorporated areas under authority delegated by the Oregon Building Codes Division per OAR 918-480. Permit review verifies setbacks (per CDC §411 and zone standards), structural plans, plumbing, electrical (GFCI bonding per NEC 680 and Oregon Electrical Specialty Code), drainage, and barrier compliance. Barrier requirements follow the 2022 Oregon Residential Specialty Code, Appendix G: 48-inch minimum fence height, self-closing/self-latching gates, 2-inch maximum gap at grade, 4-inch sphere rule for openings. Above-ground pools deeper than 24 inches require permits; inflatable pools under 24 inches are exempt. Anti-entrapment drain covers required per federal VGB Act. Cities with independent building departments — Beaverton, Hillsboro, Tigard, Tualatin, Sherwood, Forest Grove — issue their own permits using identical state code. Separate plumbing and electrical permits typically required. Final inspection must occur before filling. Stormwater connections for pool backwash must comply with Clean Water Services discharge rules.
Unpermitted pool installation: stop-work order plus retroactive permit with double fees. Barrier non-compliance: pool ordered drained until compliant. Fines $250-$2,500.
Washington County, OR
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