Two outside residential air conditioning units

A mechanical permit is required to erect, install, enlarge, alter, repair, remove, convert or replace a mechanical heating, ventilating and air-conditioning system, the installation of which is regulated by the International Mechanical Code (IMC), International Fuel-Gas Code (IFGC) or the International Residential Code (IRC). This includes, but is not limited to: furnaces, heat pumps, air-conditioning units, range hoods, fuel-oil tanks and piping system, boilers with less than 350,000 BTU combined capacity, LP-gas tanks and piping systems from the first regulator transitioning to utilization pressure.

Apply for residential mechanical permits online. If plans or a Manual J calculation are required, that information must be submitted through the ePlans system. Visit our  eServices page to learn more. 

Email Electrical and Mechanical inquiries to:
DPS.Electrical-Mechanical@montgomerycountymd.gov.

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Plan Review (If Applicable)

How it Works

Staff Directory

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Issue Permit

How it Works

Staff Directory