Home Additions

Building a home addition requires permits from both the Oregon City Planning and Building Divisions, and review from Public Works, as well. The permit process ensures that the new home addition is safe, complies with setbacks and zoning codes, and is not harmful to utility lines or public infrastructure.

For home addition development within a Historic District, or on a designated Historic structure, see the Historic Review Resources page for more information.

Please call 503-722-3789 or email the Planning Division with any Planning questions. You may also email Building Permits and email Public Works.

Review Process

Home additions are subject to a typical two-week review for compliance with applicable Planning and Development Services Standards, unless they are in Overlay Districts.

Before you begin your project, please review the information guide included below. The fillable Planning Review application form is also included below.

Street & Public Improvements Requirements on Infill Lots

Pursuant to OCMC 16.12.011, public improvements including additional dedication of property and street and sidewalk improvements may be required for home additions of more than 50% of the floor area of the original structure, if those improvements were not already constructed to current standards as part of a new residential land division or commercial project. These requirements are subject to maximum cost limitations and constitutional limitations. Modifications to these requirements may be requested through a Type II land use process. Contact the Public Works - Development Services staff for more information about public improvement requirements before finalizing your project design!

Find out More About Your Property

The City's website has a variety of resources available including Property Reports and an Online Mapping System. You may also call the Planning Division at 503-722-3789.

Oregon City Municipal Code Criteria

In addition to the zoning designation, applicable overlays, and any special requests, such as Variances, the following chapter of the Oregon City Municipal Code (OCMC) are applicable to home additions:

OCMC 17.14 for additions to Single-Family Detached homes

OCMC 17.16.030 and 040 for additions to Townhomes

Review Process

Home Additions are processed as a Type I Land Use application. Applications are typically reviewed by staff within two weeks.

Other Information

In addition to the forms, you may also be interested in:

• System Development Charges
• The Sewer Moratorium Area