929 Office Tower

Scaling down Bellevue’s Superblocks: New office tower part of a new urban model

Bellevue is saying “goodbye” to its 1950s-style superblock streetscape aesthetic and “hello” to walkable, pedestrian-friendly urban communities. The new downtown model breaks the typical 600-foot x 600-foot city blocks with new streets introduced by dynamic property developments, such as the Nine Two Nine Office Tower. The 19-story Class A office tower is connected to an eight-story parking garage via a pedestrian walkway. The street in between the two buildings creates a new foot and traffic pattern changing the urban experience into a scalable one.

DCI Engineers provided both structural and civil engineering services for Nine Two Nine Office Tower. The structural systems comprise of post-tensioned concrete floors spanning from the exterior to the concrete core. The framing systems provide a highly efficient floor system with floor plates that targets average bay depth of approximately 42’-6” from glass line to building core. The DCI civil team worked with the City of Bellevue for utility permitting and provided construction support services.

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Bellevue, Washington
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Square Feet:
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Structural, Civil
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Primary Material:
Concrete, Steel

Project Highlights

  • The building’s Great Room features a spacious two-story lobby.
  • Office levels feature 9-foot floor-to-ceiling height.
  • Certified LEED Gold for Core & Shell. The building meets a new state energy code.
  • Semi-covered pedestrian walkway between the office tower and the parking building (with 900 stalls).
  • Two-building configuration creates a new street through the 600-foot x 600-foot downtown superblock.
  • One shared below-grade level between both buildings.

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