Littleton, CO Swimming Pools & Spas: Hot Tub Rules (2026)

Residential hot tub and spa installations in unincorporated Arapahoe County require an electrical permit for the dedicated 240V GFCI-protected circuit (NEC 680 compliance). Typical cost $75-$150. The tub itself does not require a building permit if portable (drainable, relocatable). Permanent in-ground or built-in spas require a full building permit. Per IRC Appendix G, any hot tub capable of holding water over 24 inches deep requires a barrier meeting pool fence standards (48-inch height, self-closing/self-latching gates) UNLESS it has an ASTM F1346-compliant locking safety cover. This cover substitution makes hot tubs functionally exempt from fencing if the cover is used correctly. Hot tubs must meet accessory structure setbacks: typically 5 feet from side/rear property lines and behind the front building line. Pad must support tub weight (filled tubs weigh 4,000-6,000 lbs). Drain discharge cannot run to storm drains or onto adjacent property. Outdoor speakers and hot tub use are subject to general noise standards (CRS 25-12-103).