Kentucky, Jefferson County HVAC Permit Regulations and County Ordinances for Unincorporated Areas

Jefferson County HVAC Permit Requirements

In Jefferson County, Kentucky, a HVAC/Mechanical permit is required for the erection, installation, enlargement, repair, removal, conversion, or replacement of any mechanical system that is regulated by the Kentucky Building Code or Kentucky Residential Code. Louisville Metro Ordinance § 150.052 mandates that all HVAC installations are inspected for safety and code compliance, requiring approval before systems can be concealed or operated.

To perform HVAC work in Louisville/Jefferson County, contractors must hold a current and valid Kentucky Licensed HVAC Master License and a Metro HVAC Contractor's License. A Kentucky Licensed HVAC Journeyman may work under a licensed Master HVAC Contractor.

Unincorporated Areas

For properties in unincorporated areas of Jefferson County, a permit is required for all new construction, alterations, and repairs. Additionally, an Erosion and Sediment Control Permit (ESC) may be required for any land-disturbing activity. Approval for sanitary sewer or septic tanks is also necessary for all new construction and mobile home placements. It is crucial to determine your property's jurisdiction, as laws and procedures differ between incorporated cities and unincorporated county areas.

Permit Application and Process

Permits can often be applied for online through the Jefferson County Online Permitting Portal (Accela ACA Citizen Access).
For HVAC replacements, applications can be submitted through the Louisville Metro Online Permitting Portal, with instant permit issuance upon payment for replacements as no review is required.
Permit fees vary based on the type of installation (e.g., one- and two-family dwellings, multi-family dwellings, commercial installations) and the estimated cost of the project.
Each permit typically includes three inspections at no additional cost, with fees for any inspections exceeding this number.

Resources to Learn More

Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Kentucky, including Jefferson County.

Kentucky Hvac Legislation, Codes, and Guidelines

Kentucky HVAC Building Codes and Legislation

The Commonwealth of Kentucky maintains a statewide, mandatory building code system, often referred to as a "mini/maxi" code, meaning local governments cannot adopt or enforce building codes that differ from the state-mandated standards. HVAC installations are governed by the Kentucky Building Code (KBC) for commercial structures and the Kentucky Residential Code (KRC) for one- and two-family dwellings and townhouses. These codes incorporate by reference various international and national standards, including the International Mechanical Code (IMC) and the International Energy Conservation Code (IECC), with specific Kentucky-based amendments.

Primary Regulatory Agency

The Kentucky Department of Housing, Buildings and Construction (DHBC) is the primary state agency responsible for setting and enforcing building and HVAC standards. Within the DHBC, the Division of Heating, Ventilation and Air Conditioning (HVAC) oversees the licensing of HVAC contractors and journeymen, as well as the administration of the statewide HVAC permitting and inspection program. This division ensures that all HVAC work complies with state statutes (KRS Chapter 198B) and administrative regulations (815 KAR Chapter 8).

Resources to Learn More

Select a City in Jefferson County

If your project is located within incorporated city limits, you will likely need to follow municipal ordinances rather than county rules. Select your city below to view local regulations.

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