To receive a permit to install plumbing in Hamilton County (excluding City of Cincinnati), residential plumbing installers must be bonded and registered with Hamilton 
County Public Health. In some cases, homeowners may be able to obtain the permit and complete the work themselves.
Hamilton County Public Health requires all plumbing contractors (for both residential and commercial) to have an OCILB license. Licensee listings can be viewed at http://www.com.ohio.gov/dico/ocilb/.
Contractors
Residential plumbing permit information for contractors.
Homeowners
Find a Plumber
List of Plumbers in our Service Area *
*HAMILTON COUNTY PUBLIC HEALTH DOES NOT RECOMMEND OR ENDORSE ANY ONE CONTRACTOR.
Obtaining a permit
Effective January 1, 2008 you must submit the following items for residential permits:
- Completed Application for Permit to Install Plumbing
- have Ohio Contractor Industry Licensing Board (OCILB) state License (proof of license is required to obtain permit). Call (614) 644-3495 for more information.
You must have a building permit number before a plumbing permit can be issued. Contact your local building department for more information.
Contractors may now submit a plumbing permit online through the Cagis website: http://cagis.hamilton-co.org
Norwood
All workers installing plumbing must be a Norwood licensed journeyman plumber. Norwood also requires all plumbing contractors to register with the city. Call (513) 458-4510 for more information.