TTY : 503-823-6868
1900 SW 4th Ave, Portland, OR 97201
A building permit is required to build, demolish or move any carport, garage or shed that is greater than 200 square feet in area or greater than 10 feet high measured from the finish floor level to the average height of the roof. Depending on the scope of work, your project may also require electrical, plumbing or mechanical permits.
A building permit is not required to construct an non-habitable accessory structure that is 200 square feet or less in area. However, a zoning permit could be required.
The following information must be submitted when applying for a permit to construct a garage, shed or accessory structure. Since every project is unique, there may be some situations where you will be asked to provide additional information.
|Site Plan(Scale site plans to most appropriate scale, e.g. 1”=10’ or 1/4”=1’)|
|Architectural Plans (Scale of plans to be ¼”=1’ and details scaled to ½”=1’. Single line drawings are not acceptable – plans must be drawn to show wall thickness)|
|Structural Plans (Scale of plans to be ¼”=1’)|
If you are hiring sub-contractors to do work on your project, and know who they are when applying, they will be listed on your permit at that time. If you don't know when you apply for your permit, they can be added after issuance. Sub-contractors you hire must be registered with the State of Oregon and carry a current CCB license.
|THINGS TO CONSIDER:|
|(1) Fire Walls and Fire Protection|
The building code does not restrict placement of a structure on the lot, but it does require that if a structure is close to a property line, it must be constructed to a greater level of fire protection. Construction within three feet of a property line that you share with a neighbor (not a street or public alley) is required to be fire rated.
If your accessory structure is a garage and it will be attached to, or within six feet of the house, then the interior walls of the garage must be covered with a layer of ½” gypsum board for additional fire protection. Any openings (such as doors and windows) within this distance may be required to be protected, depending on the configuration.
Visit Planning and Zoning staff at the Development Services Center or call (503) 823-7526 to determine your setbacks. The zoning code regulates how close a structure can be to a property line.
|(2) Building a Garage|
You will need to show how you will provide the required parking space. Parking in your driveway alone may not meet this requirement. A detached garage may have structural deficiencies that would need to meet building code standards
The City requires that the garage be accessed via a driveway. If you don’t currently have a driveway you will be required to put one in. The driveway will need to be paved if it is within 150’ of an improved public right-of-way. For additional information on paving surfaces, see Portland City Code, Title 24.45.020.
If your project requires construction in the public right-of-way, then the Portland Department of Transportation will review the project, and issue a separate transportation permit for this work as well. For more information about right-of-way requirements, contact the Portland Department of Transportation at (503) 823-7002.
|(3) Cargo Containers|
Sometimes, cargo containers can be used as accessory structures. These are challenging in that they too must meet all the requirements of the code.
|(4) Residential Engineering|
Your project must be designed to meet all the requirements of the building code. This usually means that a full foundation with footings to the frost depth, and a complete lateral force resisting system are required.
The building code has two options for showing the building will resist lateral loads. View more information on residential engineering.
Visit the Plan Review staff at the Development Services Center to learn more about braced panel detail, alternate braced panel detail and two-story braced panel detail.
|(5) Decommissioning a Septic Tank or Cesspool|
|When building an accessory structure, the septic tank/cesspool must be located if it exists.
Call Environmental Soils staff at (503) 823-6892 for more information on decommissioning septic tanks and cesspools.
After you pay intake fees, your project will be "under review". The bureaus/review groups that will check a typical garage, shed or accessory structure project are:
The yellow inspection card lists all the inspections you will likely need during your construction project, and what work needs to be done first.
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