Sumner Station Parking and Access Improvements

Building easier connections to Sumner Station
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Project map and summary

Map indicating the location of a parking garage to the south of Sumner Station, as well as other parking areas.
Map indicating the location of a parking garage to the south of Sumner Station, as well as other parking areas.

Project updates

Like many agencies nationwide that are balancing transit operations and mega-project capital expansions, Sound Transit faces rapidly escalating costs in nearly every area of its work.  

The “Enterprise Initiative” is Sound Transit’s comprehensive effort aimed at delivering the maximum benefits of ST3 within available financial resources. As part of this effort, the Sound Transit Board is evaluating different approaches to updating the ST3 System Plan in summer 2026, which may include new ways to build, phase, or sequence projects.  

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Overview

Sound Transit is improving access to Sumner Station for riders, whether they arrive by walking, bicycling, transit or driving. The project includes construction of a garage, along with pedestrian and bicycle improvements. 

We expect the garage will open to the public in late 2026 or early 2027.