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), as appropriate. These equipments include, but are not limited to furnaces, heat pumps, air-conditioning units, range hoods, cooling towers, chillers, fuel-oil tanks and piping system, boilers with less than 350,000 BTU combined capacity, LP-gas tanks and piping systems to the first regulator transitioning to utilization pressure.
Permits shall not be required for the following:
Portable heating appliances;
Exemption from the permit requirements of this code shall not be deemed to grant authorization for work to be done in violation of the provisions of this code or other laws or ordinances of this jurisdiction.
A holder of a master, master restricted, or limited heating, ventilation, air-conditioning, and refrigeration license may not contract to provide services on behalf of the licensee, or another person who provides heating, ventilation, air-conditioning, or refrigeration services, unless the work of the licensee, including completed operations, is covered by:
Generally plans are not required for detached and attached one-and two-family dwellings. If you are installing an outside generalor, however, you will need to bring a copy of your house location survey (also called a site-plan) so that zoning may review the setbacks of your equipment. Plans for multi-family buildings and commercial buildings must be prepared by a registered professional engineer licensed in the State of Maryland and shall be submitted at the time of the building permit application.
Anyone mentioned in the previous section “Who Can Obtain a Mechanical Permit?” may apply in person or by mail.
The application(s) will be checked for the following:
If all conditions are met:
Plan submittal changes which result from the suspension of a plan review must include a "Certification Of Modified Drawings". The design professional(s) responsible for the design of the project shall review all the changes from each of the disciplines and certify that the resubmitted design documents prepared under their license did, or did not, require modification as a result of any changes made.
Permit fees are assessed in accordance with Executive Regulation No. 5-11AMIII, Schedule of Fees for Permits, Licenses and Certifications. A 10% Automation Enhancement Fee will be added to the above cost.
An electrical permit for mechanical equipment and appliance installation is required when new high voltage branch circuit conductors or feeder circuit conductors are installed. An electrical permit is not required to hook-up appliances to existing conductors and to add/replace disconnect switches.
Electrical permits will not be required for low voltage control wiring except when such circuits penetrate fire-rated assemblies, or are installed in an air plenums; provided the voltage does not exceed 30 volts.
|Application for Mechanical Permit||Application|
|Fees and Taxes|
|Fee Schedules||Executive Regulations for Fees|
|Credit Card Authorization Form||Credit Card Authorization Form|
|Automation Enhancement Fee|
|None at This Time||General Bond Information|
|Codes, Standards, Executive Regulations|
|Montgomery County Code||ICC International Mechanical Code /2009|
|Guidelines, Memorandum of Understandings, Interpretations|
Minimum Information Required for Review of Mechanical Drawings of Commercial Buildings
|Commercial Mechanical Inspections|
|Certification for Refrigerant, Hydronic and Fuel Oil Piping||Mechanical Inspection Certification|
|Certification for LP Gas Installations||Mechanical Inspection Certification for LP Gas Systems|
|Frequently Asked Questions|
|311 Web Portal: Enter key word "Mechanical"||http://www3.montgomerycountymd.gov/311|
|Online Permitting Status Information and Inspections|
|Online Data Search||Search DPS|
|Call for More Information|
|In Montgomery County||311|
|Outside of Montgomery County||240-777-0311|
|Other Agencies to Contact|
|Other Agencies and Utilities to Contact||Allegheny Power|
|American Institute of Architects (AIA)|
|American National Standards Institute (ANSI)|
|American Society of Heating, Refrigerating & Air Conditioning Engineers (ASHRAE)|
|Baltimore Gas & Electric Co. (BG&E)|
|Board of Appeals|
|International Code Council (ICC)|
|Maryland Department of Assessments and Taxation|
|Maryland Department of the Environment|
|Maryland Division of State Documents|
|Masonry Institute of America (MIA)|
|National Glass Association (NGA)|
|MNCPPC: Historic Area Work Permits|
|MNCPPC: MC Atlas|
|National Fire Protection Association (NFPA)|
|Potomac Electric Power Company (PEPCO)|
|U.S. Department of Energy (DOE) by Pacific Northwest National Laboratory (PNNL)|
|Washington Gas Light Co.|