Two Dec. 2 Open Houses Scheduled to Inform Residents About Proposed Utility Fee Increase
November 20, 2025 — Wilsonville residents and business operators are invited to attend one of two public open house events to be held at Wilsonville City Hall (29799 SW Town Center. Loop E.) on Tuesday, Dec. 2 to detail proposed increases in the City’s sewer and stormwater utility fees.
The sessions begin at 4 pm and 7 pm. Each session will begin with a presentation about the City’s recent Sewer and Stormwater Rate Review, which recommends adjusting the fee structure for residents, businesses, and developers to fund about $240 million in new capital improvement projects over the next 20 years. Afterwards, attendees will have an opportunity to ask questions of the project team.
A Dec. 15, 2025, public hearing is scheduled for the Wilsonville City Council to consider adoption of increased sewer and stormwater utility fees. The proposed fee adjustment for residents and businesses has been informed by work sessions among staff, consultants, and the City Council on Apr. 21 and Nov. 3.
If adopted, the new fee schedule would increase year-over-year fees for a four-year period between 2026 and 2029, with an inflationary adjustment built into subsequent years.
Project Background
Sewer and stormwater utility fees fund the maintenance, operation, rehabilitation, and replacement of systems that collect, clean and discharge wastewater and storm water runoff to ensure that the City’s rivers and streams are clean and our environment remains healthy.
Despite a steep inflationary increase in construction costs, these fees have remained relatively static in recent years. The sewer fee was last adjusted in 2014; stormwater fees have been unchanged since 2021.
The proposed action to adjust current fees is informed by recent updates to the City’s Wastewater Treatment Plan and its Stormwater Master Plan, both adopted by the City Council in 2024. Together, these two plans assess the staffing, materials, and infrastructure (i.e. pipes, structures, lift stations, treatment systems) needed over the next 20 years to maintain and operate the utility systems, replace outdated and worn-out components, expand and extend infrastructure to serve anticipated growth, and comply with new and changing regulatory requirements.
These plans identified new capital projects requiring more than $240 million above current expenditures. Several projects are needed within the next five years, including an $80-90 million project to install a new Membrane Bioreactor (MBR) to remove suspended solids, organic matter, and other pollutants from the wastewater system.
With updated infrastructure needs now identified, the City is taking this necessary step to ensure there is sufficient funding available to maintain these critical systems. To fund the portion of infrastructure projects necessary to support growth, a new rate schedule for sewer and stormwater system development charges (SDC) assessed on new development was adopted on Sept. 15.
For more information about the proposed sewer and stormwater utility rate adjustments, please visit wilsonvilleoregon.gov/ratereview.
To request translation services or gather additional information about the City’s Sewer and Stormwater Rate Review or the Dec. 2 open house events, contact City Engineer Zach Weigel at 503-570-1565, weigel@wilsonvilleoregon.gov.
