Lexington-Fayette, KY HVAC permit requirements

2018 Kentucky Residential Code (2015 IRC with KY amendments), plus 2015 IMC and 2009 National Fuel Gas Code for 1&2-family construction.

2009 IECC for residential 1&2-family construction ('For use with Residential buildings only').

No local amendment found. KRC keeps 2015 IRC M1401.3 unamended (Manual S sizing on Manual J loads). LFUCG's 2026 new-construction permit guide lists site, foundation, floor, framing and elevation plans only, with no HVAC or load-calc item.

Inherits the state position. No local source found.

LFUCG Code Sec. 5-32 covers mechanical permit fees 'for the installation, replacement or addition of heating, ventilation and air conditioning systems' and says no such permit is issued until the fee is paid to the Division of Building Inspection. Fee for 1&2-family: $105 first system + $50 each additional, including up to 3 inspections. This shows replacements are permitted locally. Whether a replacement permit is mandatory was not quoted from an official page.

The residential new-construction permit guide requires site, foundation, floor, framing/wall-section and elevation plans uploaded as PDF through the online portal. No mechanical-permit checklist was found.

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