Hot tubs and spas in Cupertino are regulated under the adopted 2022 California Building Code and the state Swimming Pool Safety Act. Permanent spas need a building permit, and the drowning-prevention and barrier rules apply, though a lockable safety cover can serve as one feature.
Cupertino treats hot tubs and spas as pools under the 2022 California Building Code (CMC 16.04.010) and the California Swimming Pool Safety Act. A permanently installed spa requires a building permit for electrical, gas, and plumbing connections. When a permit is issued, at least two of the seven state drowning-prevention features must be provided; an ASTM F1346 approved safety cover counts as one qualifying feature and is commonly used for spas. Portable spas holding water no deeper than the code's threshold and equipped with an approved locking cover may be treated differently, so confirm scope with the Building Division. Spas must also comply with R1 setback and equipment-noise expectations. Electrical bonding and GFCI protection are inspected.
Connecting a spa without required electrical or plumbing permits, or omitting safety features, can trigger correction notices, reinspection, and added fees.
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