TL;DR (generated, confidence: high)

Portland requires residential mechanical permits for HVAC, gas piping, and fuel work. Permits take 15 minutes to apply for and issue within 24 hours after payment. Homeowners can perform their own work, but contractors need an Oregon CCB license. Outdoor equipment faces zoning setback restrictions.

Key points:

Application takes 15 minutes; permits issued within 24 hours after payment (Residential Mechanical Permits ↗)
Required for HVAC systems, gas piping, wood stoves, fuel oil tanks, ductwork, furnaces, heat pumps, mini-split systems, and air conditioning units (Residential Mechanical Permits ↗)
Mechanical permit required even if building permit is not needed (Residential Mechanical Permits ↗)
Outdoor mechanical equipment prohibited in required front zoning setback; allowed in side/rear setbacks if under 5 feet high and screened from neighbors (Residential Mechanical Permits ↗)
Homeowners can do own work if recorded property owner by County (not LLC); contractors must have Oregon CCB license number on permit application (Residential Mechanical Permits ↗)
Each townhouse unit requires separate mechanical permit; electrical permit usually also required (Residential Mechanical Permits ↗)

Entities: city: Portland | organization: Oregon Construction Contractors Board · Oregon Department of Environmental Quality | permit: Residential Mechanical Permit | regulation: Zoning Code | resource: Fee Schedule

Residential Mechanical Permits

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Source: Residential Mechanical Permits ↗ Last modified: Sun, 19 Apr 2026 20:00:28 GMT

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The application takes 15 minutes to complete. Permits are issued within 24 hours after payment.

When you need a mechanical permit

You need a residential mechanical permit to:

Work on heating or cooling systems
- Install or modify any system that includes ductwork
- Install or change any system that vents into a chimney or other exhaust vent
Work with fuel or gas
- Install, repair, or alter gas piping (indoor or outdoor)
  - Between the gas meter and appliances
  - Between the gas line and appliances
- Install a wood stove or fireplace insert
- Install a fuel oil tank

Common projects that require a mechanical permit:

HVAC systems (heating, ventilating, and air conditioning)
Gas piping
Ductwork
Furnaces
Heat pumps
Air conditioning condensing units
Mini-split systems

Additional notes

A mechanical permit is still required even if a building permit is not.

For new townhouse projects, each unit requires a separate mechanical permit.

You will need to apply for an electrical permit ↗ for most mechanical equipment projects.

Not sure if you need a mechanical permit? Call the Residential Inspections at 503-823-7388.

Project planning

Zoning setbacks

Outdoor mechanical equipment
- Not allowed to be in the required front zoning setback.
- Allowed within a side or rear setback, in most residential zones.
  - If the outdoor mechanical equipment is within a setback:
    - It cannot be more than five feet high
    - You must hide it from neighbors using walls, fences, or vegetation.

Before starting work on your site, you are responsible for verifying and complying with Zoning Code ↗ regulations.

Outdoor mechanical equipment includes:

Outdoor air conditioner units
Generators
Kilns
Heat pumps
Pool heaters

Find out more about your setback or requirements for historic resources. Call General Inquiries at 503-823-7300.

Decommissioning an underground oil tank

Removing asbestos

Contact the Oregon Department of Environmental Quality at 503-229-5982 to find a DEQ-licensed contractor to remove asbestos ↗.

Who can do the work?

Who is doing the work?

What can they do?

Homeowners

Homeowners can do their own mechanical work.

The homeowner must be the recorded property owner by the County and not an LLC.

Licensed Contractors

All contractors doing mechanical work need a license. They must get this license from:

Oregon Construction Contractors Board (CCB) license

The permit application must list the CCB license number.

Need a contractor? Visit the Oregon CCB website ↗ for tips on hiring a licensed professional.

How to apply for a residential mechanical permit

Permit fees

The fees are listed on the Fee Schedule ↗. Search for "Mechanical permit".

Fees are based on fixtures and the work being done.