Annexation Program & Application

Annexation is the means by which property owners in unincorporated areas can join the City of Lake Oswego, receive city services and vote in city elections.  Usually, access to one or more major urban services is the reason residents and property owners outside the city consider annexation. These services include sanitary and storm sewers, city water, improved road maintenance, and greater police protection.

In 2004, the City Council adopted Resolution 04-38, a natural resources policy, discouraging the destruction of natural resources in unincorporated areas before applying for annexation to the City.  These policies were updated December 3, 2019, with Resolution 19-59.

Annexation Application Packet

The annexation application packet for 2023, found under "Attachments" on this webpage, consists of the following documents:

• Overview of the Annexation Process and Submittal Requirements (01/22/2020)
• Annexation Schedule (12/20/2023)
• Annexation Fees Notice (Revised 12/20/2023, effective 01/01/2024)
• Annexation Application and Petition (Revised 12/2022);
• Census Form (12/20/2022)

View Resolution 19-59 (Amending Policies Discouraging Destruction of Natural Resources and Significant Trees Prior to Annexation.