Which Proposition 1 is this?

Proposition 1 on the 2025 ballot in King County, Washington. Several different measures can carry the same number on one county ballot, so the year, the county and the body asking are all needed to identify one.

Where do these results come from?

The Washington Secretary of State’s certified election results. We publish the certified canvass, not election-night returns.

Why is there no argument for or against here?

Washington publishes committee-written for and against statements for most local measures. We have not ingested them. Showing one side without the other would be worse than showing neither.

Ballot measure · Washington State

City of Mercer Island Proposition No. 1 — King County 2025

City of Mercer Island Proposition No. 1 — King County 2025 was on the 2025 ballot in King County, Washington. It passed with 54.6% voting yes, on 10,034 votes cast.

2025
King County
City Measure
Proposition 1
Passed

Source WA Secretary of State official election results · as of 2026-08-07

The result

54.6%

voted yes

Passed

certified outcome

10,034

votes cast on this measure

Yes 54.6% · No 45.4%

Source WA Secretary of State certified election results · as of 2026-08-07

What it costs you

We cannot calculate what this measure costs a household. That figure needs the levy rate per thousand dollars of assessed value, and the result export does not carry it — it records how people voted, not what they were voting on. We will not estimate it: a wrong number on a household tax bill is worse than no number. The rate is published in the county assessor’s levy certification and in the voters’ pamphlet for the election.

Last checked 2026-08-07

The case for and against

Printed in the county voters’ pamphlet and mailed to every voter in the jurisdiction. Written by committees the jurisdiction appointed, and reproduced here exactly as they wrote them.

Statement in favor

Written by Russel Federman, Robert Sulkin, Benson Wong

Police officers who protect our neighborhoods and businesses are working out of temporary trailers, making accreditation impossible. Our Public Works Department (PWD) keeps utilities running, roads clear, and parks clean. But they’re working out of outdated, deteriorating buildings. This patchwork of temporary and decaying buildings is inefficient and unsustainable. With staff scattered around the Island, emergency response and city operations are harder to coordinate. These buildings can no longer support their intended purpose, and valuable city equipment and vehicles are left outside, exposed to the elements, reducing their lifespan. Proposition 1, unanimously approved by City Council, will fund a new Public Safety and Maintenance Facility to provide modern level IV earthquake-resistant workspaces for essential workers and equipment. It will help the city recruit and retain police officers and PWD staff, improving emergency and snow response. We’re not talking about luxury, but about basic safety and function. City Hall closed when asbestos abatement costs exceeded its value, and the PWD building has gone decades without sufficient upgrades. Voting yes on Proposition 1 will co-locate our most essential public safety and city functions, supporting our first responders and allowing faster, more efficient, effective, coordinated emergency response across Mercer Island. Rebuttal of statement in opposition Mercer Island needs safe, functional, resilient facilities now. The design team delivered a right-sized plan that protects vital assets, maximizes community benefit, and ensures that city services are there when you need them. Proposition 1 consolidates essential public safety and maintenance services, safeguarding the investment that keeps Mercer Island a full-service city and ensuring we can respond effectively when emergencies happen. Don’t be misled by bad math and false comparisons. Learn the facts at https://safe-mi.org/GetTheFacts.

Statement in opposition

Written by Mike Cero www.miforss.com

A rigorous examination reveals the City’s proposed design is one of excessive overreach. The proposed building is almost twice as big as the previous footprint. Covered storage-space is 4.7 times greater than the current area. Office space is proposed to be 44% larger than the existing space, yet many more employees work remotely. The police vehicle capacity is set to expand 50%? Yet, estimated population growth since 1990 is less than 1% per annum, and student enrollment is expected to decline. The City is assembling loads of unneeded capacity at a huge and avoidable cost to taxpayers. The proposed $103,000,000 bond will cost Island Taxpayers $174,000,000 with interest. For the median assessed valued home of $2,300,000, that represents a 46% annual increase in City Property Taxes, or $660/year. Over 25 years that’s additional taxes of almost $19,000. The simple solution is to pare down the project to reflect the maturity of the city. Also, eliminate nice to haves like a private gym facility, separate department locker rooms and overhead vehicle coverage for every city vehicle. On behalf of your neighbors, tell the City to go back to the drawing board by voting No on Prop 1. Rebuttal of statement in favor No statement submitted.

Neither statement is fact-checked, by the county or by us. King County Elections prints these as the committees submit them and does not correct punctuation, grammar, or accuracy. They are arguments, not findings. We reproduce them because they are what voters were sent, and we take no position on the claims in either one.

Last checked 2026-08-07

Source King County voters’ pamphlet · as of 2026-08-07 · page 103 of the pamphlet

The pamphlet as published · archived copy, which is what we read

Who is funding each side

Political committees registered with the Public Disclosure Commission that named this proposition number when they formed.

No committee named this proposition number. We searched PDC committee filings for proposition 1 in 2025 and found none. That can mean no committee formed, or that one formed without naming the number — the filings do not distinguish the two.

Last checked 2026-08-07

What this county has asked before

Other city measures put to King County voters. Matched on county and measure kind — the results export carries no jurisdiction key, so these are comparable measures rather than provably the same body asking again.

Comparable earlier measures
Year	Measure	Yes	Result
2025	City of Bothell Proposition No. 1 — King County 2025	69.1%	passed
2025	City of Burien Proposition No. 1 — King County 2025	47.2%	passed
2025	City of Lake Forest Park Proposition No. 1 — King County 2025	49.8%	passed
2025	City of Seattle Proposition No. 1 — King County 2025	80%	passed
2025	City of Seattle Proposition No. 2 — King County 2025	71%	passed
2024	City of Des Moines Proposition No. 1 — King County 2024	40.2%	passed
2024	City of Seattle Proposition No. 1 — King County 2024	66.5%	passed
2023	City of Maple Valley Proposition No. 1 — King County 2023	65.7%	passed

Source WA Secretary of State certified election results · as of 2026-08-07 · 8 of 8 passed

What this page will not compute

Each of these is a number a reader might reasonably expect. None of them follow from the records we hold, so we do not publish them.

What it costs a household: Requires the levy rate per thousand of assessed value, which the results export does not carry. Stated above rather than estimated.
Whether the money decided it: We can show what each side raised and what the vote was. Connecting the two would be an inference about cause from two numbers, and campaign spending is not the only thing that moves a local levy.
Whether this is the same body asking again: Earlier measures are matched on county and kind, not on jurisdiction — the export has no jurisdiction key. A school district and its neighbour both appear as school measures in the same county.
What the measure would have done: The ballot title and the full text are not loaded. We hold the result, not the proposal.

Common questions

Did City of Mercer Island Proposition No. 1 — King County 2025 pass?: Yes, it passed. 54.6% voted yes on 10,034 votes cast.
Which Proposition 1 is this?: Proposition 1 on the 2025 ballot in King County, Washington. Several different measures can carry the same number on one county ballot, so the year, the county and the body asking are all needed to identify one.
Where do these results come from?: The Washington Secretary of State’s certified election results. We publish the certified canvass, not election-night returns.
Why is there no argument for or against here?: Washington publishes committee-written for and against statements for most local measures. We have not ingested them. Showing one side without the other would be worse than showing neither.

Cite this page

This is public-records reporting. Use it, and say where it came from.

“City of Mercer Island Proposition No. 1 — King County 2025,” WashingtonIndependents.org, data as of 2026-08-07, accessed 2026-08-09. https://washingtonindependents.org/measure/2025-king-prop-1-city-of-mercer-island-proposition-no-1/

Where this page comes from

Every figure above is read from a primary source and rebuilt on a schedule. Nothing here is modelled or inferred; where a source is silent the page says so rather than filling the gap.

WA Secretary of State certified election results: The vote totals, the yes share and the outcome. Certified canvass, not election-night returns.
Public Disclosure Commission committee registrations: Committees formed for or against the measure, matched by the proposition number they registered. Committees that did not name a number are not linked here.
Not loaded: Ballot title and full text, the voters’ pamphlet for and against statements, and the levy rate. Each is named where the page would otherwise use it.