Residential Mechanical Permit
You need a mechanical permit when:
- Installing new mechanical equipment (e.g. new air conditioner, heat pump, furnace, etc.).
*Exception: When replacing a like for like electric heat pump, permits are not required.
- Replacing any furnace, hydronic piping (hot water piping) or its associated duct work.
- Installing or replacing any flue or new vent associated with mechanical equipment.
- Replacing an existing furnace with one that utilizes a different fuel.
Note: A chimney reline requires a building permit, not a mechanical permit. If the mechanical work involves gas, a gas permit will also be required. If the mechanical work involves electrical work, an electrical permit will also be required.
Download required inspections for mechanical projects (PDF).
|Project Type||"X" = Required Inspection|
Rough In Mechanical
Above Ground Tank Install*
Underground Tank Install*
|Adding 3 or more ducts to any forced air system||X||X|
|Installing a system for an addition||X||X|
|Installing one or more systems for a new house||X||X|
|Replacing a system with a larger system||X|
|Installing a system where one did not exist||X||X|
|Installing an oil tank||X||X|
|Installing a wood stove||X|
|Replacing a fuel-fired furnace or boiler||X|
* The tank inspections are for fuel oil and kerosene tanks. Propane is in the gas inspections section.
Before scheduling your inspection:
- A not ready fee may be charged if the work to be inspected is not complete when the inspector arrives.
- A re-inspection fee may be charged for third and subsequent inspections of the same type.
When to Schedule an Inspection
- Final Mechanical - After all equipment is installed and operational
- Mechanical Rough-in - After all the duct work and associated piping are installed and before the building insulation and wall board are installed