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Planning and Sustainability

Innovation. Collaboration. Practical Solutions.

Phone: 503-823-7700

Fax: 503-823-7800

1900 SW 4th Ave, Suite 7100, Portland, OR 97201

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400s Overlay Zones

Overlay zones consist of regulations that address specific subjects that may be applicable in a variety of areas in the City. Plan districts consist of regulations that have been tailored to a specific area of the City. Both overlay zones and plan districts are applied in conjunction with a base zone and modify the regulations of the base zone. The Official Zoning Maps identify overlay zones and plan districts as well as the base zones and other information.


Heartbleed Security Notice

A serious security vulnerability known as "Heartbleed" was recently discovered in OpenSSL, a popular software library commonly used by many websites on the internet to encrypt communication between a user's computer and a web server.

PortlandOregon.gov is NOT affected by this vulnerability as it does not use the OpenSSL software library. Please rest assured we are dedicated to protecting your security on this website.