1900 SW 4th Ave, Portland, OR 97201
This page offers links to additional information for new construction and improvements to houses, duplexes and two-unit townhouses. For more information about the permit process and related requirements, select the project type that applies to you.
Information on Accessory Dwelling Units (ADUs) and adding a dwelling in an existing structure.
Information on converting your attic, basement or garage into additional living space.
Information on adding or replacing a deck.
Information on demolishing structures.
Information on adding onto your house or duplex, when the scope includes expanding the upper story or attic outside of the existing roof or envelope.
Information related to adding onto your house or duplex, when the scope of work includes new living area outside of the existing walls.
Overview of requirements for adding a fence.
Information related to small, non-habitable structures on the same property such as a house or duplex.
Information related to manufactured homes: putting one in a new location or altering an existing home.
Information relating to walls that support dirt fill.
General Structure Notes, Sample Plan & Details
You will find information on this page about installing a solar electric system or a solar water heating system on your house or accessory structure.