Plumber License Requirements in Ohio
License RequiredLast verified March 9, 2026
Agency And Exam
Issuing agency: Ohio Construction Industry Licensing Board
Official licensing agency website
Exam provider: Not listed
Reciprocity And License Levels
License levels
Plumbing ContractorHydronics Contractor
Reciprocity states
None listed
Notes
Ohio licenses plumbing contractors through the Ohio Construction Industry Licensing Board. Official Ohio law states that chapter 4740 licenses are issued to individuals as plumbing contractors or hydronics contractors and establishes the board's plumbing and hydronics section for specialty licensure and reciprocity. Verified against Ohio Revised Code chapter 4740 on 2026-03-09.