Who issues the permit in Unincorporated Multnomah County?

The local building department for Unincorporated Multnomah County handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.

How do I find out the exact requirements for my project?

Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.

Do I need a permit for standby generator installation in Unincorporated Multnomah County?

Permit required

Yes. In Oregon, standby generator installation generally requires a permit, and Unincorporated Multnomah County is no exception.

A permanently installed generator and transfer switch is a new electrical installation that needs a permit before work starts (ORS 479.550). Installing or altering gas piping between the meter or LP tank and an appliance needs a mechanical permit, and LP gas work must be done by a person licensed through the State Fire Marshal, including homeowners. Zoning setbacks and noise limits for generator placement are set locally.

Get the checklist for your standby generator installation in Unincorporated Multnomah County. A free check first, then a free printable Permit Prep Pack.

Local detail for Unincorporated Multnomah County: Multnomah County handles zoning only. Building permits for unincorporated areas are issued under agreement by the City of Gresham (most of unincorporated east Multnomah County), the City of Portland, or the City of Troutdale, depending on the address. The office listed is Gresham Permit Services; confirm which city serves your address.

Documents you may need

Electrical permit from the local program or BCDRequired
Generator and transfer switch specificationsRequired
Site plan showing generator location and clearancesLikely required
Mechanical permit for natural gas or LP gas pipingLikely required

Possible inspections

Electrical inspection of the generator, transfer switch, and wiring
Gas piping pressure test and inspection
Final inspection

Frequently asked questions

Do I need a permit for standby generator installation in Unincorporated Multnomah County?: Yes. In Oregon, standby generator installation generally requires a permit, and Unincorporated Multnomah County is no exception. The documents and inspections sections on this page list what the building department typically asks for.
Who issues the permit in Unincorporated Multnomah County?: The local building department for Unincorporated Multnomah County handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
How do I find out the exact requirements for my project?: Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.

PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.