Some research on your property may be required in preparation for submitting a building permit application. Find out how to research your property and where to locate the information in preparation for your permit application.
The following information must be submitted when applying for a permit to build an ADU. Since every project is unique, there may be some situations where you will be asked to provide additional information.
- Completed building permit application form
- Completed NSFR Intake Packet if proposing a Detached ADU
- Completed Life Safety Completeness Checklist for New Single Family Residences for a Detached ADU
- Completed Life Safety Residential Additions and Alterations Completeness Checklist for a new ADU created by remodeling or adding onto an existing structure.
- Completed residential system development charge form
- Site and building construction plans:
For brand new construction, see the submittal standards and drawing criteria in the NSFR Intake Packet (see above).
For altering an existing structure to add an ADU, see the submittal standards and drawing criteria in Adding a Dwelling Unit Submittal Requirements.
- Erosion control plan (may be a part of the site plan) or completed simple site erosion control form, if the project will result in ground disturbing activity. Note: Erosion control measures shall be installed, inspected and approved even when a simple site erosion control form has been accepted.
- Mitigation form and/or a stormwater plan if your project will add more than 500 square feet of impervious area
To submit for a permit, bring these forms, and four (4) copies of site, architectural, and structural plans (for the area of proposed work and areas affected by such work ) along with intake fees to the Development Services Center.
The Bureau of Development Services sells a "Residential Combination" permit package. This allows you to call for all inspections using just the Building Permit (RS) IVR number and pay for all the permits at one time. You will need to submit the trade (mechanical, electrical, and/or plumbing) application(s) signed either by you, if you are doing these portions of the work yourself, or by your licensed subcontractors. If you do not have your completed subcontractor forms when you are applying for your residential permit (RS) you will have to apply for trade permits separately from the building permit. Sub-contractors that you hire must be registered with the State of Oregon and carry the correct licenses in association with their trade.
You may estimate your permit fees using the Online Fee Estimator.