Hot tubs and spas in Castle Rock are covered by the adopted 2024 International Swimming Pool and Spa Code and need building and electrical permits. A spa or hot tub with an approved safety cover may be exempt from the perimeter barrier requirement.
Castle Rock permits spas and hot tubs under the 2024 ISPSC, 2024 IRC and 2026 National Electrical Code. Electrical hookup (240V, GFCI protection, bonding and grounding) is inspected. Under the ISPSC, a spa or hot tub equipped with a listed safety cover that complies with ASTM F1346 may be exempt from the 48-inch barrier that otherwise applies to pools. Without such a cover, the spa must be enclosed by a compliant barrier. Confirm the required cover or barrier with the Building Division during permitting.
Installing a spa without required permits or without an approved cover/barrier can result in stop-work orders and correction requirements under Title 15.
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