Boulder County, CO Swimming Pools & Spas: Pool Permits (2026)
Swimming pool permit rules in Boulder County, CO, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.
Key Facts
- Permit required
- Yes, county building permit
- Pool threshold
- Water over 24 inches deep
- Code adopted
- 2021 ISPSC + county amendments
- Applies to
- Unincorporated Boulder County
- Submittal
- Online PDF permit portal
Summary
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).
Any structure intended for swimming, recreational bathing or wading that contains water over 24 inches (610 mm) deep.
Full Breakdown
Boulder County's Community Planning & Permitting reviews and permits residential pools, spas, and hot tubs on one- and two-family lots. Publication B26 defines a swimming pool as "Any structure intended for swimming, recreational bathing or wading that contains water over 24 inches (610 mm) deep," which includes in-ground, above-ground, on-ground pools, hot tubs, and spas. Applications must be submitted online in PDF format through the county permit portal, and installations must comply with the county-adopted 2021 ISPSC plus Boulder County building code amendments. Inside the cities (Boulder, Longmont, Louisville, Lafayette), the city's own building department issues pool permits, not the county.
Violations & Fines
Building without a permit can trigger stop-work orders, double permit fees, and correction requirements; unbarriered pools are a life-safety violation subject to abatement.
Frequently Asked Questions
Do I need a permit for a small hot tub?
Does the county permit my pool if I live in a city?
Sources & Official References
Other rules in Boulder County
Compare Boulder County to another location·View the Colorado swimming pools & spas overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.