Planning a project? Do this first: Find your zoning using PortlandMaps
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Source: Planning a project? Do this first: Find your zoning using PortlandMaps ↗ Last modified: Sun, 19 Apr 2026 20:00:36 GMT
Update: The Zoning Information Line is now General Inquiries. General Inquiries phone number is 503-823-7300.
Why research your zoning?
You don’t want to waste money and time on design plans for something that you might not be able to build.
Construction on a property could have environmental impacts. The property may be in a neighborhood that has special design rules. These are some considerations the city cares about. It’s a good idea to know exactly what rules you’ll need to follow before you even start planning.
It's helpful to keep this in mind if you’re looking to buy a home and you want to make major improvements or changes to it.
How to find zoning information for free on PortlandMaps
Go to PortlandMaps.com ↗ and at the top right field enter your street address. It should locate your property or it’ll give you a list to choose from.
PortlandMaps.com home page desktop view. Enter your street address in the top-right text field.
What we’re looking for is the zoning. Simply put, zoning requirements are the rules for what you can and cannot do on a property.
Next, let’s toggle down the "Permits and Zoning" tab and select the "Zoning and Districts" button.
Toggle down the Permits & Zoning tab and select the Zoning & Districts button.
There are three main things to look for under "Zoning & Districts":
- Base zone
- Overlay zone
- Plan district
Under Zoning & Districts take note of the Base Zone, Overlay Zone, and Plan District.
The base zone is the basic information about what that property can be used for and how it can be developed. Every property has a base zone. To learn more, click on the base zone link. Any blue text links to more information that will open up in a new tab. In this example, the "R" means “Residential”. That means this property is only for household living purposes but not anything else like an office or retail space.
If there’s a link or note next to where it says overlay or plan district that usually means there may be additional rules you’ll need to follow.
In this example, the overlay shows it's in an Environmental Conservation zone.
For this example, the overlay shows the property is in an Environmental Conservation zone. That means if I wanted to build an addition or even a deck there may be additional rules to follow. The addition most likely can't be on the back without a thorough review by the environmental team. That's because there's a creek that flows through the backyard. They want to make sure that whatever building happens in this backyard will not impact the health of that creek that eventually flows into Tryon State Park and the Willamette River.
Schedule a 15-minute appointment
Talk to zoning staff before planning a project. If your property is in an overlay zone or plan district please call. This is a free service and we do not keep any record of these conversations.
Schedule a free 15-minute appointment with zoning ↗
Another option: call the General Inquiries phone number
Another option is to call General Inquiries. This is a free service for general zoning information and staff does not keep any record of these conversations.
Call General Inquiries at 503-823-7300. Be sure to provide the following:
- Your name
- Phone number
- The address of the project location
- A brief description of your project
Our city planners will research your property and call you back.