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

Under the California Building Code §3109.2 and Residential Code, the definition of 'swimming pool' expressly includes hot tubs, spas and portable spas containing water more than 18 inches deep. As a result, a permanent spa or hot tub in Alameda typically requires permits through the Permit Center (building/electrical/plumbing) and, when a permit is issued at a single-family home, must comply with the Swimming Pool Safety Act's barrier and two-of-seven drowning-prevention features (H&S §§115922–115923). Alameda Municipal Code §30-5.12 governs placement: in-ground spas and their equipment may sit in a required rear or side yard only with a 5-foot setback from any property line; but portable pools, spas, hot tubs and similar features that the Building Official determines are not structures are exempt from the accessory-building and in-ground setbacks — with the explicit exception that no mechanical equipment for those portable spas may be within 5 feet of a property line. The technical spa electrical rules (240V disconnect within sight, GFCI protection, bonding) come from the California Electrical Code that Alameda enforces, not from a separate city spa ordinance. Confirm permit requirements for a specific plug-and-play unit with the Alameda Permit Center.