Swimming Pools & Spas in Boulder County, CO (2026)
2 county-level rules, plus city-specific rules for 2 cities in Boulder County, Colorado.
Verified from official government sources
Pool Permits
A building permit is required to build a swimming pool, spa, or hot tub in unincorporated Boulder County. Any structure holding water over 24 inches deep is a regulated pool and must meet the county-adopted International Swimming Pool and Spa Code (ISPSC).
Pool Building Permit in Unincorporated Boulder County
Some RestrictionsBoulder County Publication B26 (2021 ISPSC — swimming pool definition)
Any structure intended for swimming, recreational bathing or wading that contains water over 24 inches (610 mm) deep.
Fencing & Safety Requirements
A pool, spa, or hot tub in unincorporated Boulder County must be enclosed by a barrier meeting 2021 ISPSC Section 305. The barrier must be at least 48 inches high measured from the outside, with no gaps a 4-inch sphere can pass, and any gate must be self-closing and self-latching.
Pool Barrier and Fence Rules (ISPSC Section 305)
Some Restrictions2021 ISPSC Section 305 (adopted by Boulder County)
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, and such height shall exist around the entire perimeter of the barrier.
Swimming Pools & Spas by City in Boulder County
2 cities in Boulder County have their own swimming pools & spas rules. Each link goes to that city's dedicated page with code citations.
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