3-4 Plex

Triplex and Quadplex HomesA triplex or quadplex is a building located on one lot and containing three to four dwelling units in any vertical or horizontal arrangement.

Street & Public Improvement Requirements on Infill Lots

Pursuant to OCMC 16.12.011, public improvements including the additional dedication of property and street and sidewalk improvements may be required for new construction and additions of more than fifty-%, 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 and any special requests, such as Variances, the following chapters of the Oregon City Municipal Code (OCMC) are applicable to 3-4 Plexes:


Check the Planning Fee Schedule for current fees. Note that additional applications and associated fees are required from other departments, agencies, and consultants.

Review Process

Triplex or quadplexes are processed as a Type I Minor Site Plan and Design Review application. Applications are typically reviewed by staff within two weeks.

Other Information

In addition to the related documents on this page, you may also be interested in: