Sammamish, WA Swimming Pools & Spas: Hot Tub Rules (2026)

Sammamish does not maintain separate spa rules; it relies on the adopted swimming pool/spa code and the property maintenance code. Under SMC Chapter 16.25, hot tubs and spas containing water more than 36 inches deep must be surrounded by a barrier at least 48 inches high, with self-closing and self-latching gates and openings too small to pass a 4-inch sphere. However, following the adopted code's exceptions, a spa or hot tub equipped with a lockable safety cover complying with ASTM F1346 is exempt from the perimeter barrier requirement — this is the most common compliance path for residential hot tubs. Spa and pool heaters must be installed per manufacturer instructions and listed standards, and the electrical disconnect must sit at least 5 feet horizontally from the water (IRC E4203.3). Portable electric spas and in-ground spas must meet Washington State Energy Code controls, including a vapor-retardant cover for heated in-ground spas. Building, electrical and/or mechanical permits apply when wiring, gas lines, or a built-in spa structure are installed.