Fire Regulations in Multnomah County, OR (2026)

Multnomah County Code § 21.453

Unless exempted from complying with this subchapter or otherwise allowed by state law, no person shall operate a wood burning device or permit recreational burning during a red day air quality advisory.

Multnomah County Code § 38.7305(B)

All buildings and structural projections such as porches, balconies and decks shall be surrounded by a maintained defensible space fuel break of at least 50 feet to minimize the risks associated with wildfire, unless the County approves an alternative pursuant to (B)(2) or (B)(3) below. Hazardous fuels shall be removed within the defensible space fuel break area. Irrigated or fire resistant veg...

Multnomah County Code § 21.453; § 21.457

The Department shall perform air quality forecasting and issue air quality advisories daily. Air quality advisories will be made available to the public. The Department shall caution against the operation of wood burning devices and recreational burning during a yellow day air quality advisory. Unless exempted from complying with this subchapter or otherwise allowed by state law, no person shal...

Multnomah County Code § 39.4110(D)(2)

A secondary fire safety zone is a fire break extending a minimum of 100 feet in all directions around the primary safety zone. The goal of this safety zone is to reduce fuels so that the overall intensity of any wildfire is lessened. Vegetation should be pruned and spaced so that fire will not spread between crowns of trees. Small trees and brush growing underneath larger trees should be remove...

Multnomah County Code § 39.5515(A)(10)(c)

Heating oil, propane and similar tanks up to 1,000 gallon capacity placed within 100 feet of a lawfully existing structure provided any pipes crossing through SEC-s, SECwr, or SEC-w areas are provided by directional boring. (d) Mechanical equipment such as heating and air conditioning units, heat pumps, ventilation and air filtration systems, electrical boxes, back-up power generators and energ...