Mechanical Permit Information and Questions

When do I need a mechanical permit?

Mechanical permits are required when vents and ducts are added, replaced or relocated. This includes dryer vents, range hood vents and extending heating ducts, adding registers and replacing furnaces and air conditioning units.

  • Installation of any new HVAC equipment (including small exhaust fans)
  • Installation or alteration of ductwork, vent system or chimney.
  • Installation of a fireplace insert of gas fireplace.
  • Install, alter, or repair gas piping between meter and an appliance.
  • Exhaust bath fans, dryer vents, kitchen exhausts etc.
  • Anytime a gas supply line need to have a gas meter set or to unlock an existing gas meter. Schedule a 460 Gas/Mech inspection (Air test of gas lines is required)

When is a mechanical permit NOT required?

  • Portable heating appliances, portable cooling units, portable evaporative coolers, portable ventilation appliances and equipment.
  • Steam, hot water or chilled water piping within any heating or cooling equipment or appliances regulated by this code.
  • The replacement of any minor part that does not alter the approval of equipment or an appliance or make such equipment or appliance unsafe.
  • Self-contained refrigeration systems that contain 10 pounds (4.5 kg) or less of refrigerant, or that are actuated by motors of 1 horsepower (0.75 kW) or less.
  • Portable fuel cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.

When are plans/drawings required with my permit application?

Commercial: All commercial mechanical projects will need to provide plans designed by a licensed professional unless approved otherwise.

Residential (1-2 Family Dwellings): Mechanical is not reviewed on permits for 1-2 family dwelling permits; compliance will be field verified at the time of inspection. Review of appliance locations will be provided where equipment locations are shown on the floor plans. 

Inspections Required

The holder of the permit shall be responsible for the scheduling of such inspections.

  • Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place. Where excavated soil contains rocks, broken concrete, frozen chunks and other rubble that would damage or break the piping or cause corrosive action, clean backfill shall be on the job site. 
    Exception: Ground-source heat pump loop systems tested in accordance with Section 1210.10 shall be permitted to be backfilled prior to inspection.
  • Rough-in inspection shall be made after the roof, framing, fire blocking and bracing are in place and all ducting and other components to be concealed are complete, and prior to the installation of wall or ceiling membranes.
  • Final inspection shall be made upon completion of the mechanical system.

Show All Answers

1. Electrical Permit Information and Questions
2. Plumbing Permit Information and Questions
3. Mechanical Permit Information and Questions
4. Demolition Permit Quesitons
5. Do I need a Building Permit?
6. What inspections are required?
7. When do permits or applications expire?
8. Can I file a complaint about the property I am renting?