Washington Mutual Center Green Roof

Seattle, Washington, U.S.A.

Project Facts

  • Native and drought resistant plants cover approximately two-thirds of the roof.
  • Unlike many green roofs, the space also acts as a functional area for employees and visitors, featuring an outdoor fireplace, pathways through the garden, a deck and windscreen.
  • The roof features a large glass abacus screen wall, in homage to the roof’s location on top of a financial institution and “The Change Garden” – a repository for spare change that will be donated to Seattle charities.


  • Urban
  • Green Roof
  • Corporate
  • Commercial
  • Garden

Environmental Benefits

  • Captures Water
  • Cleans Water
  • Conserves Water
  • Cools Air Temperature
  • Creates Habitat for Wildlife
  • Prevents Soil Erosion
  • Reduces Urban Heat
  • Sequesters Carbon