57th Ave S Sidewalk Improvement Project
Construction is anticipated to begin late spring 2027

Road Services is building a new sidewalk to connect two existing ones on 57th Ave S in Skyway. Right now, there’s no continuous path between Martin Luther King Jr Way S and S Langston Rd. This project will help people who walk, use wheelchairs, or push strollers travel more safely and easily along the road.
Status update
April 2026
King County Roads issued a State Environmental Policy Act (SEPA) Notice of Action Taken (NAT) on April 22, 2026.
Project information here: Project Documents.
The SEPA Notice of Action (NAT) comment/appeal period is April 22, 2026 – May 20, 2026
Send comments to:
Amy Bresslour, Communications
Email: abresslour@kingcounty.gov
Phone: 206-477-9223
Project overview
The 57th Avenue S Sidewalk project is one of 45 projects selected by community members to be funded by King County as part of its first participatory budgeting process. This project will improve both walking and driving conditions along 57th Avenue South, between Martin Luther King Jr. Way South and South Langston Road. A new 5-foot-wide concrete sidewalk will be built to fill in the missing section between existing sidewalks. This will create a continuous, safer, and accessible path for people walking in the neighborhood, whether they’re heading to school, the bus stop, or just out for a walk.
Sidewalks are important because they help keep pedestrians safe by giving them a space away from traffic. They also make it easier for people of all ages and abilities, including those using wheelchairs, strollers, or walkers, to move around the community. In addition to the sidewalk, the project will include new stormwater drainage improvements to improve drainage and reduce water buildup along the road.
Once the sidewalk and drainage work are done, crews will repave the slightly wider road with a fresh layer of asphalt between South Langston Road and SR 900/Martin Luther King Jr. Way South. This will help create a smoother experience for drivers, cyclists, and transit riders alike. Construction is expected to begin late spring 2027.
Project Location

The project is located on 57th Ave S between Martin Luther King Jr Way S and S Langston Rd, in Skyway.
What to expect during construction
Construction is currently planned to take place in late spring 2027 and last up to eight weeks. The road will remain open during construction. All vehicles will have access through the work zone, though travelers should expect delays. During work hours, flaggers will direct two-way traffic through a single open lane as needed. Neighbors may notice increased truck traffic on the road, and dust, odor, and vibration from construction equipment.
Budget and funding sources
The total estimated cost of the sidewalk project is $1.4 million, and $538,000 is the expected total for the asphalt overlay portion of the project. The sidewalk project is funded by the King County Department of Local Services Participatory Budgeting Program, and the overlay project is funded by King County Department of Local Services.
Project timeline
- Project design complete: anticipated early 2026
- Construction and lane restrictions begin: anticipated late spring 2027
- Construction ends: anticipated summer 2027
Project documents
State Environmental Policy Act (SEPA)
SEPA Notice of Action Taken (NAT) – (261KB) Issued, April 22, 2026
The SEPA Notice of Action (NAT) comment/appeal period is April 22, 2026 – May 20, 2026
Send comments to:
Amy Bresslour, Communications
Email: abresslour@kingcounty.gov
Phone: 206-477-9223
SEPA Determination of Nonsignificance (DNS) – (241KB) Issued, March 5, 2026
SEPA Environmental Checklist (ECL) – (7MB) Signed, February 19, 2026
Frequently asked questions
The existing pavement width is approximately 21 feet. The new construction will provide pavement widths ranging from 24 to 26.8 feet, including two travel lanes totaling 22 feet in width and shoulder or edge buffer on both sides.
These improvements will enhance driving safety, provide more consistent roadway geometry, and better accommodate vehicle operations.
Photos

The southern end of 57th Ave S has an existing sidewalk in place. King County plans to install an additional stretch of sidewalk on this road to connect to the existing network, making it safer for people to walk, roll, or use mobility devices.
Translate
