OH HB339

Creates a "residential only license" category for heating, ventilation and air conditioning, refrigeration, electrical, plumbing, and hydronics contractors to work on one-, two-, or three-family dwelling houses and accessory structures.

Establishes a "universal license" for contractors permitted to work on all construction projects, distinguishing between residential-only and broader construction work.

Allows municipal corporations and county boards to require specialty contractors to register and pay fees, but prohibits additional testing or licensing requirements for contractors holding valid state licenses.

Provides a six-month grace period after the bill's effective date during which people may perform residential construction duties without a license; afterward, licensure becomes mandatory.

Includes a transition provision allowing applicants with prior state or local licenses or three years of active experience to obtain licensure within six months of the effective date without passing the examination.