Permit Required? Required
Typical Fee Range $125–$250 Standard residential fee for AC/Furnace replacements is $125.
Fee Method Flat rate
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What's Required in Portland

  • A mechanical permit is required for replacing any heating or cooling unit.
  • Must follow current Oregon energy codes for system efficiency.
  • Proper secondary drain pan and safety float switches required for attic installs.
  • Manual J load calculations required for new system designs to ensure proper sizing.
  • Condenser units must be anchored and meet property line setbacks.
  • Must be performed by a licensed Mechanical contractor or owner-occupant.

Do You Need a Permit to Replace an AC or Furnace in Portland?

Yes. Portland treats HVAC replacement as permit-required work, and that includes the common case people hope is exempt: a like-for-like swap of a furnace, AC condenser, or heat pump in the same location. Permit fees typically run $125–$250, and the permit is issued by the Portland Permitting & Development. In practice your HVAC contractor pulls it as part of the job — if a bid doesn't mention the permit, ask why, because unpermitted mechanical work surfaces at home sale time and in insurance claims.

HVAC Repairs vs. Replacement: Where the Permit Line Falls

The line falls at equipment, not maintenance. Repairs that keep an existing system running — a blower motor, capacitor, control board, or a thermostat swap on existing wiring — generally don't need a permit. Replacing the equipment itself, adding or reworking ductwork, or running new gas or electrical almost always does. Refrigerant-line and coil replacements sit in the gray zone and vary by city. When the scope is unclear, describe the exact job to the Portland Permitting & Development before work starts; it's a five-minute call.

How to Get a HVAC Permit in Portland

1

Step 1: Equipment Sizing

Perform Manual J calculations to select a unit appropriate for the climate.

2

Step 2: Portal Application

Submit a 'Mechanical' permit application via Development Hub PDX.

3

Step 3: Fee Payment

Pay the flat permit fee ($125 minimum typical).

4

Step 4: Installation

Complete the install ensuring all safety controls and vents meet code.

5

Step 5: Inspection

Schedule a final mechanical inspection via the portal.

Frequently Asked Questions

Standard residential replacement permits are $125.
Yes, all residential furnaces require a mechanical permit in Portland.
Yes, as an owner-occupant, but you must still pull a permit and pass inspection.
Adding or altering ductwork is mechanical work that typically requires a permit in Portland. Confirm the scope with the Portland Permitting & Development before starting.