MEP Permitting Services

An MEP permit is a type of construction permit - separate from a building permit - required for projects involving the installation, alteration, repair or replacement of mechanical, electrical and plumbing systems. These typically include heating, ventilation and air conditioning (HVAC) equipment; ductwork; and related systems.

MEP permits ensure that work complies with local and state building codes, promoting safety and functionality as well as against hazards such as carbon monoxide leaks, fire risks and ventilation issues. Each system most often requires its own permit, though some projects might be eligible for a combined permit if they meet certain benchmarks.

Both residential and commercial property owners need to obtain an MEP permit when installing or modifying, whether the work is done by a contractor or the property owner.

Work typically requires an MEP permit in the following instances (Note: These are examples, not an exhaustive list.)

• Installing a new HVAC system.
• Replacing or relocating ductwork.
• Installing or replacing boilers, furnaces or chillers.
• Gas line, water line or drainage work for heating systems or appliances.
• Commercial kitchen exhaust system installation
• Large-scale refrigeration system installation.
• New electrical connections are required.
• Replacing or modifying major components that affect performance, structure or energy use.

You may not need an MEP permit in the following instances (Again, these are examples, not an exhaustive list.)

• Changing air filters or cleaning ducts.
• Minor repairs that don’t alter the system’s structure.
• Repairing a minor HVAC leak.
• Replacing a thermostat.
• Routine repairs or replacing small components that do not affect performance, structure or energy use.

To apply for an MEP permit, applicants typically need to provide specific details to ensure the project complies with local building codes and safety standards.

Basic project information includes the location, a project description, a contractor’s licence number (if applicable) and owner information if the work is done by a contractor.

Expect to submit project plans, diagrams, blueprints and drawings along with schedules and a breakdown of what equipment is being installed. These include load calculations to ensure that the system is safely sized for the space.

Energy compliance information is required in some regions. This includes manufacturer and model numbers as well as system capacity.

Other documents are dependent on the project. For example, gas line permits typically are required only if any of the work involves installing or modifying gas lines. And in some cases, fire and smoke safety requirements must be met for exhaust systems and ventilation.