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Future Annexation and Municipal Urban Growth Areas

Join us for an Open Community Conversation

The City of Mill Creek is exploring annexing part of its Urban Growth Area, and we want to hear from you!

Save the Date!

📆 Tuesday, November 17, 2026
⏰ 6:00 PM – 7:30 PM
📍 Jackson High School Library - 1508 136th St. SE, Mill Creek

Whether you’re curious about how the process works or have questions about what potential changes could mean for your neighborhood, this upcoming Community Town Hall is an opportunity to view maps, learn how the annexation process works, hear about potential changes to services and boundaries, and connect directly with City Councilmembers and staff.
Your questions, ideas, and perspective are important as we discuss the future of our community. We hope to see you there!

Annexation Update

The Mill Creek City Council voted 6–0, with one abstention, at its October 13 meeting to approve a resolution authorizing the City Manager to pursue annexation of designated unincorporated areas within the City’s Municipal Urban Growth Area (MUGA).

The proposed first phase focuses on south of the City’s existing boundaries. The area includes neighborhoods near 180th Street SE and 192nd Street SE, with boundaries generally extending east toward 35th Avenue SE and west toward the North Creek corridor. 

2026 Annexation Map Mill Creek MUGA
Potential Mill Creek Annexation Subarea Map

Frequently Asked Questions

What is being proposed?

Mill Creek is discussing annexing a portion of its Urban Growth Area south of the city. The physical boundaries are 35th Avenue down to 180th, following 22nd Dr SE to 192nd St SE, up Waxen Rd to 183rd St SE into Mill Creek. View the boundary map here. 

Isn’t this area already part of Mill Creek?

No, the properties are in unincorporated Snohomish County. However, it is part of Mill Creek’s Urban Growth Area. 

Why is the City doing this?

The Growth Management Act of 1990 expects cities – not counties – to serve urban areas to prevent sprawl, protect the environment, and deliver services more cost-effectively as communities grow. Annexing this area aligns with that expectation.

What will change for residents in the annexation area?

The City will receive property taxes from the area instead of the county. All residents will come to the Mill Creek City Hall for services they require. In addition, they will have elected representation through the seven-member Mill Creek City Council.

Will taxes increase for residents in the annexation area?

Property owners in the annexed area will see a property tax levy decrease from $9.26 to $8.73 per $1,000 of assessed property value. (Approximately $250 less per year for a home valued at $850,000.) New city residents will start paying a utility tax of 5% like existing city residents. This is estimated to range from $327 - $423 per year. (It will be less if you no longer have cable services.)

What will change for property owners and residents already in the city?

Short-term, revenue from additional properties will maintain city service levels reducing the need for higher taxes. Long-term, annexation will spread the cost of large-scale capital projects over more people, reducing an individual’s tax burden.

What are the benefits of annexation?
  • Public Safety – The city has its own police department and can provide more officers per resident (1.06 per 1,000 residents) compared to the Sheriff’s office (0.23 per 1,000).
  • Cost-Effective for Taxpayers – Improved public safety services can reduce what property owners pay in insurance premiums. Revenue from new properties help maintain city services without the need for tax increases. Finally, additional revenue means the city has matching funds to secure more grants or access to favorable interest rates for large capital projects.
  • Infrastructure Improvements – Infrastructure improvements are expensive yet necessary for all communities. Counties can delay those investments for areas they anticipate will be annexed. Annexation spreads those costs over more properties which reduces an individual’s tax burden.
  • Local Control – Annexation allows city residents to guide how development occurs, ensuring quality, consistency, and alignment with community expectations. This is important to protect property values. City residents also have elected representation (or can run for office themselves) to influence other decisions that may impact the community. 
     
Will property owners have to join an HOA?

No, property owners do not have to join a homeowner’s association.

Why this area specifically?

The area already reflects the current feel and nature of the city. Many residents also shop, work, attend schools, use city roads, and recreate in city parks.
 

Why annex this area now?

This is not a sudden decision. This area has been in the city’s UGA for 34 years and is part of the short-term priorities in Council’s 2040 visioning document passed in 2024. 
 

How many people live in this area?

Approximately 11,000.
 

How many people live in the city’s UGA?

Approximately 54,000
 

Why not just annex the whole UGA?

Annexations must be carefully planned to ensure the city is able to provide services and infrastructure investments to an area. Careful analysis has gone into determining that this is the right size of an area and population to ensure continuity and improvements to service.
 

What codes will change for the annexed areas?

There are some differences between Mill Creek code and County code. Please submit your specific questions below and we will get you an answer!

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City Council Annexation Discussions

  • October 13, 2026 – Council voted to authorize the City Manager to proceed with pursuing annexation of certain unincorporated areas within the City’s Municipal Urban Growth Areas.
  • July 28, 2026 – Consultants Rob Fenty (1961 Consulting) and Sarah Emmans (SME Consulting) provided key updates and scenario analysis for areas of potential annexation. Council gave guidance to staff about what scenarios to study more closely.
  • June 23, 2026 – Consultants Rob Fenty and Sarah Emmans presented Council with three proposed areas for consideration that would help narrow the Council’s desired direction for phase one of annexation. With new updated information related to infrastructure and a clearer direction for a path forward, Ms. Emman’s will then bring forward updated staffing assumptions and financial projections for this narrowed area of interest, which consists of Mill Creek East and some of Mill Creek South.
  • May 05, 2026 – Rob Fenty, 1961 Consulting, guided Council in an annexation discussion kickoff.
  • April 14, 2026 – Council voted to approve a contract with 1961 Consulting and a contract with SME Consulting for annexation feasibility work.
  • February 24, 2026 – Rob Fenty, 1961 Consulting, led Council and staff in the Strategic Planning Retreat, providing Council the opportunity to discuss pros and cons of two of the four Urban Growth Areas (UGAs), Martha Lake and Larch, and facilitated Council’s prioritization of the four potential annexation options.
  • February 10, 2026 – Rob Fenty, 1961 Consulting, led Council and staff in the Strategic Planning Retreat, developing a framework to use when considering potential annexation areas and providing Council the opportunity to discuss pros and cons of two of the four Urban Growth Areas (UGAs), Mill Creek East and Mill Creek South. Sarah Emmans, SME Consulting, provided additional information to Council about the UGAs. 
  • February 03, 2026 – Deputy City Manager Brock and consultant Sarah Emmans of SME Consulting LLC led a discussion about the Annexation Feasibility Study findings.
  • January 27, 2026 – Council approved an amendment to the contract with SME Consulting for the Annexation Feasibility Study.
  • December 09, 2025 – 1961 Consulting Partner Rob Fenty led a Study Session on the upcoming 2026 City Council Strategic Retreat, which will focus on the topic of potential annexation.

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