400 Westlake

400 Westlake Ave N, Seattle, WA 98109, USA


A preserved landmark, in harmony with a modern addition.

South Lake Union is one of the fastest developing neighborhoods in the entire United States. Right in the heart of it, at 400 Westlake, MSRE is redeveloping the landmarked Firestone Tire Building into what will be the greenest office building of its size in the world.

  • Excellent access to I-5 and I-99
  • Superb location for public transit and bicycle commuters
  • Pedestrian- and pet-friendly area
  • Surrounded by cafés, restaurants, fitness studios, and coffee shops
  • Incorporation of iconic artwork into the landscaping and lobby
  • Open-space, landscaped roof terrace (3,500 sf) on the top level
  • Total building energy consumption 75% less compared to the 2012 Seattle Energy Code
  • Non-potable water used only for non-potable uses
  • Photo-voltaic fins collect energy during all daylight hours
  • Designed to provide the maximum amount of daylight to all interior spaces, including stairwells

Awards & Recognition

  • 2024 Sustainable Development of the Year, NAIOP
  • 2024 Development of the Year, CoStar
  • 2023 Energy Vision Award, 2030 District

Property Documents

Individual Floor Plans

3D Virtual Tour

  • IconTypical Floor – 15,246 RSF


  • Property Size: 216535 Sq Ft
  • Property Type: Office
  • Property Status: Available Now
  • Total Square Feet: 230,000
  • Available Square Feet: 216,535
  • Completion Date: Spring 2023
  • Number of Floors: 15
  • Parking: Two levels of below-grade parking for vehicles and bicycles


360° Virtual Tour

3rd Floor View

10th Floor View

15th Floor View

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