Review of ezones in North Portland underway

Property owners in the Columbia Corridor and on Hayden Island are invited to talk with City planners about the Environmental Overlay Zone Map Correction Project at drop-in hours in July.

The Portland Bureau of Planning and Sustainability is in the process of correcting ezone maps around the city. Ezones are a tool to help protect natural resources, such as rivers, streams, wetlands and wildlife habitat in Portland.

The Environmental Overlay Zone Map Correction Project team is now reviewing the ezones in the Columbia Corridor and on Hayden Island. Property owners and other interested community members are invited to talk with City planners about changes to the ezones maps during drop-in hours at the Multnomah County Drainage District, 1880 NE Elrod Drive, on:

  • Wednesday, July 17, 11 a.m. – 1 p.m.
  • Thursday, July 25, 5 – 7 p.m.

Staff will have online maps for you to look at and can talk about how the project may affect your property.

What is the Ezone Map Correction Project?

The Environmental Overlay Zone Map Correction Project will correct the boundaries of the conservation (c) and protection (p) overlay zones to match the locations of rivers, streams, wetlands, floodplains, forests, steep slopes and wildlife habitat. Project staff started work in areas near Johnson Creek, then expanded to the northeast neighborhoods. This spring the project focused on the Northwest and Southwest Hills. Work on ezones is now underway in the Columbia Corridor. 

How will this affect you?

We expect the environmental overlay zones will only change slightly on most properties. But some properties may have expanded ezones; others may have smaller ones. You can learn more in a self-guided presentation.

Find your property on a map

You can use the Ezone Review Map to look up your property. This map will tell you what kinds of environmental overlays apply now and what are proposed to change. You can also request a site visit through the Ezone Review Map, and staff will come to your property to review the data.

How do I use the Ezone Review Map?

There are step-by-step instructions for using the Ezone Review Map in the self-guided presentation, starting on slide 11.

For more information

Visit the website:


Call: 503-823-4225