'First of its kind' mass timber office extension completed in Washington DC

2022-10-13T13:11:00-04:00

Work has been completed on the 80 M office building in Washington DC. The project, which saw a three-story timber extension added atop an existing seven-story concrete building, is described by the design team as “the first commercial office building in Washington DC to feature a vertical extension constructed using mass timber.”

The 108,000-square-foot addition was designed by architects Hickok Cole with Arup providing mass timber and sustainable building engineering services. Opened in September, the scheme is also the “first high-rise overbuild timber structure in North America” according to the team.

Inside, the extension includes office and amenity spaces with 15-foot-high ceilings and 12-foot-high windows as well as 4,000 square feet of outdoor amenities including a rooftop terrace.

Photo by Ron Blunt for Columbia Property Trust

According to Arup, the scheme’s realization required engagement with “restrictive code requirements” in the United States pertaining to mass timber; ...

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'First of its kind' mass timber office extension completed in Washington DC