Louisville, Kentucky HVAC Local Permit Ordinances and Codes

The Authority Having Jurisdiction (AHJ) for HVAC permit ordinances in Louisville, Kentucky, is the Louisville Metro Government Construction Review Division, operating under the Department of Codes and Regulations.

Permit Requirements and Fees

A HVAC/Mechanical permit is required for the erection, installation, enlargement, repair, removal, conversion, or replacement of any mechanical system regulated by the Kentucky Building Code or Kentucky Residential Code.
Permits are required for new HVAC installations, replacements (even same-for-same), modifications or installations of ductwork, and mini-split systems.
For 1 & 2 Family Dwellings, the permit fee is $105 for the first system and $50 for each additional system.
For Multi-Family Dwellings, the fee is also $105 for the first system and $50 for each additional system.
Commercial/Non-Residential permit fees are calculated based on the total dollar value of the HVAC installation (actual or estimated, including labor and materials).
A minimum permit fee of $75 applies to all permits.
Other HVAC permit types include:
- Mechanical Refrigeration: $40 per compressor.
- Manufactured fireplaces: $50 per unit.
- Range Hoods: $75 per unit.
Permit fees can range from $50-$200 depending on system size for general installations, replacements, and major repairs.
A plan review fee is charged if applications are reviewed without a permit issuance or for requested refunds, with a minimum of $30 or one-third of the normal permit fee, whichever is higher.
Additional inspections beyond the included three per permit cost $50 each.
A $30 administrative fee is charged for permit refunds.
Permit extension fees apply if a permit expires and is reactivated within 180 days.

Zoning and Other Nuances

Louisville Metro Ordinance § 150.052 ensures all HVAC installations are inspected for safety and code compliance before systems are concealed or operated.
Contractors must possess a Kentucky HVAC Master License and a Metro HVAC Contractor's License to perform work in Louisville/Jefferson County.
A Kentucky HVAC Master Contractor or Journeyman must be present on-site for the entire duration of installation or repair.
New federal HVAC efficiency standards went into effect January 1, 2023.
Kentucky enforces updated SEER (Seasonal Energy Efficiency Ratio) standards, requiring a minimum SEER 15 rating for all new systems as of January 2023.
HVAC systems in multi-family buildings (duplexes or larger) must be permitted as commercial projects.
Zoning in HVAC refers to dividing a property into separate areas for independent heating or cooling control, which can enhance comfort and energy efficiency but may involve higher initial installation costs and require professional design and calibration.

Resources to Learn More

Because Louisville is located within Jefferson County, the following broader county regulations may also apply to your project:

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

The following statewide building codes and regulations apply universally to all jurisdictions within Kentucky:

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

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