TL;DR (generated, confidence: high)

Portland requires residents in fire-prone areas to create defensible spaces around homes using fire-resistant materials, fire-resistant plants, and fuel reduction to slow wildfire spread and protect lives and property, though survival is not guaranteed.

Key points:

Defensible space involves changing, reducing, or clearing potential wildfire fuel materials and vegetation to create a barrier that slows wildfire spread. (Wildfire Hazard Areas - Residential Structures and Landscaping ↗)
Three critical steps: use fire-resistant building materials, landscape with fire-resistant plants, and reduce flammable materials such as invasive trees, shrubs, plant trimmings, firewood, fiberglass boats, and recreational vehicles. (Wildfire Hazard Areas - Residential Structures and Landscaping ↗)
Defensible space allows room for firefighters to fight fire safely while slowing wildfire advance. (Wildfire Hazard Areas - Residential Structures and Landscaping ↗)
These precautions don't guarantee home survival but increase wildfire resistance; actual survival depends on fire expanse, number of threatened homes, and fire engine deployment. (Wildfire Hazard Areas - Residential Structures and Landscaping ↗)
Using fire-resistant materials when building or remodeling greatly increases chances of home survival. (Wildfire Hazard Areas - Residential Structures and Landscaping ↗)

Entities: concept: defensible space | building_practice: fire-resistant building materials | landscaping_practice: fire-resistant plants | hazard_type: wildfire fuel materials

Wildfire Hazard Areas - Residential Structures and Landscaping

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Source: Wildfire Hazard Areas - Residential Structures and Landscaping ↗ Last modified: Sun, 19 Apr 2026 20:05:57 GMT

One and two-family residential dwellings and reducing the risk of wildfire

In the Pacific Northwest, fires have historically been a natural part of the changing landscape. If you build next to a fire-prone area, you must take special precautions to protect your life, home and property.

You can create a defensible space around your home. You do this by changing, reducing or clearing potential wildfire fuel materials or vegetation to create a barrier. The barrier slows the spread of wildfire toward your home. A defensible space also allows room for firefighters to fight fire safely. Three critical steps in creating a defensible space include:

using fire-resistant building materials
landscaping with fire-resistant plants
reducing flammable materials or fuels, such as invasive trees and shrubs, plant trimmings, firewood, fiberglass boats and recreational vehicles around the home

These actions don’t guarantee that your home will survive a wildfire. They can make your landscape and home more wildfire resistant. They may also slow the advance of a wildfire. Several factors affect the chances of your home surviving a wildfire like the:

expanse of an approaching fire
number of homes threatened
number of fire engines deployed to each neighborhood

Whether a home survives a fire depends on the fire-resistant characteristics of the building. By using fire-resistant materials when building or remodeling, you can greatly increase the chances of your home surviving a wildfire.