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Answers are based on statewide default rules for Kentucky, Ohio, Florida, Texas, and California — and general national defaults for all other states. Local jurisdictions sometimes differ from state defaults. For a definitive answer, use this as a starting point and confirm with your local building department. Links in the result go to our detailed state and county guides.
Kentucky requires a permit for all replacements. Homeowners can pull once per 5 years for primary residence. Fee: ~$105 in Boone County.
Kentucky Guide →Ohio requires mechanical + electrical permits for mini-splits. Hamilton County and Cincinnati have separate permit offices. Confirm your jurisdiction first.
Hamilton County Guide →System failed on a weekend? Proceed with the installation, apply for the permit the next business day. Double fee if you miss that deadline.
Boone County Guide →Heat pumps often require 2–3 permits: mechanical, electrical, and possibly a panel upgrade permit. IRA rebates require permitted installations.
Heat Pump Guide →