Information for new construction and improvements to houses, duplexes and two-unit townhouses. Depending on the scope of work, your project will most likely need electrical, plumbing and/or mechanical permits.
When you need a residential building permit
When you need a zoning permit
Learn more about when you need a zoning permit, when you don't need a zoning permit and how to get started with a zoning permit application. Find all of the required forms for a zoning permit. Then, apply for a zoning permit from the City of Portland.
Who can do the work
Contractors must have a license to work in Oregon. The Oregon Construction Contractors Board (CCB) issues licenses to contractors. The permit application and their company materials must list the license number. Need help finding a contractor? The CCB website has good tips on how to search for one. Plumbing and Electrical contractors have additional license requirements.
If you are a homeowner doing the work yourself, then you can sign the trade permit applications. You can only do the electrical work if you own and occupy the home and are not planning on selling or renting within 6 months. The State of Oregon has some helpful information for homeowners:
Building and zoning permit application
Get detailed information about what you need to apply in the list of all residential building permit types. Many of the webpages have very specific application requirements with items you must include to have a completed application.
Code and Rules
We review permits using multiple city and state codes including:
- Oregon Residential Specialty Code
- Portland City Codes
Other codes may apply based on the scope of work. The City and State Codes, Administrative Rules, Code Guides and Program Guides web page has the codes, administrative rules, code guides and program guides.
Report a code violation
How to research your property
Planning and Zoning
- What can you build on your lot?
- What are the design rules for the structure?
- Does your property have an overlay or plan district?
- What are the required setbacks?
More information about setbacks
A setback is the distance measured from your property line to a point inside the property. Also:
- A setback creates a border inside your property lines.
- Setback requirements are different in each residential zone.
- A front setback is usually larger than the side and rear setbacks.
- For purposes of determining setback, the front is the side that borders a street.
- On a corner lot, the front is the shortest side of the lot that borders a street.
- If the street frontages are of equal length, you may choose which to call the front.
Building permit history
Depending on the age of your house, we may have its permit history. It is important to verify the permit records, not rely on the tax information from the county assessor’s office. If "existing” living space was not permitted, it will need to be legalized through a new permit. To become permitted living space, you must apply for conversion permits as if the work was not already done.
Some records are available online. Visit our How to Request Public Property Records from Development Services page.
Decommission a septic tank or cesspool
If you plan to build an addition, and the house was not connected to the sewer when it was built, you will likely need to decommission the cesspool or septic tank. If you are not sure, you can search the historic plumbing records.
If your home is in a floodplain
If your house is located in a floodplain, there are restrictions to what you can do to improve your house. The work may require retrofitting your house to be flood resistant. Flood plain information is available on Portland Maps Flood Hazard gallery. If the property is located in a flood plain, talk to Site Development and Septic Review in the early stages for what is needed.
Permit fees are based on the:
- type of permit
- work proposed
- valuation of the work
- staff that need to review the work
Schedule all inspections and pay for all permits at the same time- combination permits
Development Services sells a "Residential Combination" permit package. This allows you to schedule all inspections using one Building Permit (RS) IVR number. You can also pay for all of the permits at one time. If you choose a combination permit, you will need to submit the trade (mechanical, electrical, and/or plumbing) applications with your plans.
If you hire subcontractors to do the trade work, they must sign their trade permit application. Read more about residential permit inspections.
Residential engineering requirements
Your project must be designed to meet all structural requirements in the building code. Please review Structural Design Requirements for One and Two-Family Residential Structures for more information on these requirements.
List of all residential building permit types and links to apply online
Every project is unique; every project has different requirements. The pages below have the forms that go with each application including the building permit application. The pages also include information about:
- how to apply for permits- forms and checklists to help you complete your application and information about where and how to apply
- what happens after you apply
- how to check on your permit application
- how to get ready for residential permit inspections and contact inspectors
- how to make corrections
Add an Accessory Dwelling Unit (ADU)
An accessory dwelling unit (ADU) is a second dwelling unit created on a lot with a house, attached house or manufactured home. The second unit is smaller than the main dwelling. Read more about Accessory Dwelling Unit (ADU) permits and apply online.
Additions - Enlarge the building footprint
Any project that enlarges the footprint of an existing building is an addition and requires a building permit. Read more about Addition to Enlarge the Building Footprint- Residential Building Permits and apply online.
Additions - Add an attic dormer or upper story
Building a dormer or a new second story to a single-family dwelling or duplex changes the building envelope and is an addition. Read more about New Addition - Dormer or Upper Floor Residential Building Permits and apply online.
Alterations to convert unfinished space into living space
Unfinished areas may not meet current building code requirements for living space. Read more about Attic, Basement or Garage Conversion Residential Building Permits and apply online.
Build a deck or replace a deck
Some decks may be exempt from requiring a building permit, but may still require a Zoning Permit, depending on specific site conditions or placement on the lot. Read more about Deck Residential Building Permits and apply for a permit online.
Build a fence taller than seven feet
You need a building permit when building a fence taller than seven feet. Read more about Fence Residential Building Permits and apply for a permit online.
Build garages, sheds and accessory structures
A building permit is required to build, demolish or alter any carport, garage or shed that is greater than 200 square feet in area (measured from the interior side of the exterior walls) or greater than 10 feet in height (measured from the finish floor level to the average height of the roof).
Your project may also require electrical, plumbing or mechanical permits. Read more about Garages, Sheds and Accessory Structures Residential Building Permits and apply online.
Build a New Single Family Residence (NSFR)
Get a permit application and all required forms for building a new home. Read more about New Single Family Residence (NSFR) Permits- Residential and apply online.
Build a retaining wall
Find out if you need a permit for a retaining wall. Read more about Retaining Wall Residential Permits and apply online.
Demolish a building
Apply online for residential demolition permits and permits for demolishing a building in the City of Portland.
Do interior alterations with minor exterior work
Depending on the work, most interior alterations require a permit:
- Cutting a new window or door opening, widening or reducing the size of existing openings
- Moving, removing or adding walls
- Adding a bathroom in new or existing space
Architectural plans should clearly show existing conditions and proposed.
Get a simple bathroom permit
Find out how to get a bathroom permit without drawing plans. Learn more about how to apply and start a simple bathroom permit application.
Major Residential Alteration and Additions (MRAA)
A major residential addition is adding more than 500 square feet of new interior space by expanding the building footprint or envelope. A major alteration means removing 50% or more of the exterior walls above the foundation. Read more about Major Residential Alteration and Addition Permits.
New and remodeled stairs projects
Read about new and remodeled stairs permit requirements including all required measurements. Learn about building permits and spiral stairs, new stairs projects, winder stairs, handrails, guardrails permits and more.
List of all residential trade permits and links to apply online
Some building permit projects might also need electrical, mechanical and plumbing work done. You'll find the applications on the linked pages. You can also read about the permits here:
Still need help? Schedule a 15-minute appointment
If you have questions after reviewing the information on this page, we recommend you book a free 15-minute appointment with us.
This is an optional step. We're here for you if you have questions about the information and materials you need to apply.