Support The Legacy Center

Inclusion Includes You!

People smiling in front of an orange background. Text says: The Arc Legacy Center, opening Summer 2025.

Welcome to The Arc Legacy Center, a place where accessibility, inclusion, and community come to life. Step through the doors of our new home and you’ll experience a beautiful space where every detail says: you belong here.

This groundbreaking project is the result of years of planning, partnership, and shared vision for an inclusive future. More than just a building, The Arc Legacy Center is a permanent hub for community– a space where individuals with IDD and their families can find support, connection, and opportunity.

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Special Elements in The Arc Legacy Center:

  • Universal accessibility
  • Designed for seamless mobility, ensuring all can navigate freely and easily
  • Sensory-inclusive design
  • Dimmable lighting, sound reduction elements, and a dedicated quiet
  • Multipurpose Room
  • A flexible, open gathering space for workshops, trainings, and community events
  • Innovative All-Gender Restrooms
  • Hoyer lift, adult changing table, and wheelchair accessible stalls
  • Onsite Accessible Parking
  • Spaces reserved for our community with EV charging stations
  • User-Friendly Spaces
  • Lowered switches, automatic door sensors, and adaptive workspaces ensure independence and ease of use.


Multi-story blue and white apartment building with a colorful mural on the facade, street-level retail space.

The future home of The Arc Legacy Center in SeaTac – a bold new space where accessibility, inclusion, and community come to life. Opening Summer 2025

Designed in partnership with Mercy Housing Northwest, the building will also offer 130 affordable apartment homes. We’re thrilled 26 units are reserved expressly for individuals with IDD and referred by The Arc of King County. Direct access to the Angle Lake light rail station takes residents to work, school, and services easily. 


The Arc Legacy Center is more than just a building – it’s a promise. A promise to the IDD community that there will always be a safe and inclusive place.



This is our moment to come together and build something that lasts, something benefiting generations to come, something truly transformative. Every gift matters – big and small – every gift will help us make this space for the IDD community a reality.

Read about the details of our new home.

Umpqua Bank logo with a white upward-pointing arrow on a black background. The text "UMPQUA BANK" is in white.
King County Best Starts for Kids logo: Colorful text and a logo of a person's face.
WOLKEN architects, black text.
Logo for King County Developmental Disabilities Division; face silhouette above text.
Washington State Department of Social & Health Services logo. Three stylized figures in dark gray. Text appears on the right.