Permit Requirements for Lithonia, Georgia
For HVAC projects in Lithonia, determining the correct permitting authority depends on whether the project site is located within the incorporated city limits or in an unincorporated area of DeKalb County.
Authority Having Jurisdiction (AHJ)
Most jurisdictions require permits for HVAC work to ensure safety and code compliance. The governing body responsible for issuing these permits varies by specific location:
General HVAC Guidelines
Permits are usually required for new installations, structural modifications, or major repairs. While minor maintenance or cosmetic updates may be exempt, landowners should always verify local codes before work begins.
Help Us Improve This Guide
If you have found a direct link to a permit portal or a specific local ordinance for HVAC in this area, please submit an update.
Because Lithonia is located within Dekalb County, the following broader county regulations may also apply to your project:
Georgia, DeKalb County Hvac Permit Regulations and County Ordinances for Unincorporated Areas
DeKalb County Building & Safety Jurisdiction
In DeKalb County, the Department of Planning & Sustainability is responsible for the administration of building permits, including mechanical and HVAC permits. This department oversees the review, issuance, and inspection processes to ensure compliance with the Georgia Uniform Codes Act and locally adopted building codes. It is important to note that DeKalb County only handles permitting for unincorporated areas. Many cities within the county, such as Decatur, Brookhaven, Dunwoody, Chamblee, and Doraville, operate their own independent building departments. Property owners should verify their specific jurisdiction before beginning the application process.
HVAC Permit Requirements for Unincorporated Areas
For properties located in unincorporated DeKalb County, a mechanical permit is required before beginning the installation, alteration, or repair of HVAC systems, with the exception of ordinary repairs that do not exceed a specific wholesale cost threshold. Applicants must certify that their design and installation meet the Georgia Uniform Codes Act, which includes the Mechanical Code, Fuel Gas Code, Energy Code, and ACCA Manuals "D" and "J" for ductwork and sizing.
The application process generally involves creating an account in the county's e-permitting portal, submitting the necessary documentation (such as plans, scope of work, and contractor information), and paying the required fees. Contractors performing the work must be licensed by the State of Georgia, hold a valid business license, and be registered with DeKalb Development Services. Once a permit is issued, it must be posted at the job site, and the primary applicant is responsible for scheduling required inspections through the county's portal or designated inspection channels as the work progresses.
Resources to Learn More
The following statewide building codes and regulations apply universally to all jurisdictions within Georgia:
Georgia Hvac Legislation, Codes, and Guidelines
Georgia HVAC Building Codes and Legislation
In Georgia, building construction standards, including those for HVAC systems, are governed by the Uniform Codes Act. The state adopts mandatory minimum standard codes that apply to all construction across the state, regardless of whether they are locally enforced. These codes consist of national model codes published by the International Code Council (ICC) or other standard-setting bodies, supplemented by specific Georgia amendments.
Adopted Codes (Effective January 1, 2026)
As of January 1, 2026, the State of Georgia has adopted the following mandatory codes relevant to HVAC design, installation, and energy efficiency:
- 2024 International Mechanical Code (IMC) with Georgia Amendments
- 2024 International Fuel Gas Code (IFGC) with Georgia Amendments
- 2024 International Residential Code (IRC) with Georgia Amendments (for one- and two-family dwellings)
- 2024 International Building Code (IBC) with Georgia Amendments (for commercial and multi-family structures)
- 2015 International Energy Conservation Code (IECC) with Georgia Supplements and Amendments
Primary State Agency
The Georgia Department of Community Affairs (DCA) is the primary agency responsible for the adoption and maintenance of the state's minimum construction codes. The DCA facilitates the State Codes Advisory Committee (SCAC), which reviews new model codes and proposes amendments. Final adoption of these codes is approved by the Board of Community Affairs.
Resources to Learn More