Trinity County, CA Swimming Pools & Spas: Hot Tub Rules (2026)

Trinity County's swimming-pool zoning section (17.30.070) does not call out spas or hot tubs specifically; it addresses "swimming pools" and their setbacks, equipment location, and the six-foot self-latching fence requirement. Where the County's code is silent on spas, the controlling rules come from state law applied through the County's adopted California Residential Code. The Swimming Pool Safety Act (Health & Safety Code 115920-115929) defines pools to include spas and applies its requirements to spas. Under HSC 115922, when a building permit is issued for a new spa (or remodel) at a private single-family home, the spa must have at least two of seven approved drowning-prevention features, the same menu that applies to pools, including an isolating enclosure (60-inch minimum height per Section 115923), an approved safety cover, exit alarms, self-latching doors, or an in-water alarm. New spas also need approved anti-entrapment suction outlets under HSC 115928. Many spas qualify for the safety-cover option because an approved, lockable spa cover can satisfy one of the two required features. Because portable spa permitting can vary, owners should confirm with the Trinity County Building Division whether a building or electrical permit is needed and which safety features will be required for their installation.