A private home hot tub needs no county license. Public and semi-public spas (apartment, hotel, gym, HOA) must be licensed annually by the Butler County General Health District under ORC 3749 and OAC 3701-31. Residential spas with a lockable safety cover may be exempt from the pool barrier.
Ohio law, not a Butler County ordinance, governs spas. ORC 3749.04 requires a license for any public spa; the Butler County General Health District licenses and inspects them ($365 plus an $80 state portion per spa). A private residential hot tub is not a public spa and needs no county license. Under the Ohio building code, a spa or hot tub equipped with an approved lockable safety cover may be exempt from the surrounding 48-inch barrier requirement. Electrical work still needs the applicable municipal or township permit.
Operating a public spa without a license violates ORC 3749—the Health District may refuse, suspend, or revoke the license and close the spa. Uncovered residential spas without a barrier can fail local building inspection.
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