Do I need a permit for hvac replacement or installation in Marietta?
Yes. In Georgia, hvac replacement or installation generally requires a permit, and Marietta is no exception.
Replacing a furnace, air handler, or condenser generally requires a mechanical permit in Georgia jurisdictions even when it is a like-for-like swap. Gas or electrical connections may require coordinated inspections; use a licensed mechanical contractor where required. Cobb County's own permitting office is the Cobb County Development and Inspections, reachable on 770-528-1000 at https://www.cobbcounty.gov/community-development/building-development/permitting. Its online permit portal is https://cobbca.cobbcounty.gov/CitizenAccess/default.aspx. It issues permits for the unincorporated county. If your city does not run its own building department, and many smaller Georgia municipalities do not, this is the office that will handle the job. A change-out is normally a mechanical permit, and gas fired equipment usually adds a second permit and a pressure test. Marietta requires a mechanical permit for all work on heating, air conditioning, exhaust, ventilation, and gas supply systems, and requires load calculations for all new equipment at the time of application. Change-out systems must be inspected within 30 days of installation. Inspections are in person, scheduled by the contractor, and someone must be home to let the inspector in. A duct tightness test must be posted for remodel work with new systems or a 50 percent modification of existing ductwork. Homeowners cannot apply for mechanical, electrical, or plumbing permits in Marietta. The licensed contractor must pull the trade permit through SagesGov.
Documents you may need
- Mechanical / technical permit applicationRequired
- Equipment specifications (capacity, model)Likely required
- Contractor license and insurance informationLikely required
- City of Marietta mechanical permit, pulled by the licensed contractorLikely required
- Load calculations for new equipmentLikely required
- Gas line permit and pressure test where gas piping is addedSometimes required
Possible inspections
- Mechanical rough-in inspection (for new or relocated equipment)
- Final mechanical inspection
- Mechanical inspection within 30 days of installation
- Gas line test where applicable
Frequently asked questions
- Do I need a permit for hvac replacement or installation in Marietta?
- Yes. In Georgia, hvac replacement or installation generally requires a permit, and Marietta is no exception. The documents and inspections sections on this page list what the building department typically asks for.
- Who issues the permit in Marietta?
- The local building department for Marietta handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.