Swimming pool permit rules in Herndon, VA β also covering above-ground pools, in-ground pools, and spa installations β set fencing, barrier, alarm, and inspection requirements.
Fairfax County requires a building permit from Land Development Services for any private pool, spa or hot tub with a surface area greater than 150 sq ft, capacity over 5,000 gallons, or depth of 24 inches or more. Separate plumbing and electrical permits also apply. All outdoor pools must have a barrier meeting the International Swimming Pool and Spa Code Section 305 (48-inch minimum height).
Under the Virginia Uniform Statewide Building Code (13VAC5-63), Fairfax County Land Development Services requires a building permit for any swimming pool, spa, or hot tub with a surface area greater than 150 sq ft, capacity over 5,000 gallons, or depth of 24 inches or more. A separate electrical permit is required for lighting, outlets and circulating equipment, and a plumbing or mechanical permit is required for fuel-fired heaters. All outdoor pools, spas and hot tubs must be enclosed by a barrier that meets the International Swimming Pool and Spa Code Section 305 as adopted by the USBC: minimum 48-inch height, openings that prevent passage of a 4-inch sphere, gates self-closing and self-latching opening away from the pool, and ground clearance of 2 inches over grass or 4 inches over hard surfaces. The Fairfax County Health Department does not regulate private residential pools. Pool setbacks vary by zoning district under Zoning Ordinance Chapter 112 Article 5; well and septic separations are typically 20 feet. Building fees increased 12.5% effective July 1, 2025; confirm current fees with Fairfax County Land Development Services at 703-222-0801.
Installing a pool deeper than 24 inches without a building permit, or omitting required electrical and plumbing permits, can result in a stop-work order and civil penalties under the USBC. A non-compliant barrier (under 48 inches, gaps over 4 inches, non-self-latching gate) will fail final inspection.
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