The Pacific Northwest city of Seattle is currently in the midst of a building boom, with demand largely fuelled by the region's surging technology industry. Immediately north of Seattle's Financial District in the Denny Triangle neighbourhood, developer Seneca and tech giant Amazon's multi-phased Amazon Towers office complex has just completed its 37-storey first phase, and construction is progressing on the adjacent second phase tower.

Amazon Tower I in Seattle, image by Forum contributor SounderBruce

Standing at a height of 160 metres (524 feet), the NBBJ-designed Amazon Tower I officially topped out in February 2015. Following months of cladding work and interior fitting, the completed office tower finally opened its doors yesterday. Less than two weeks prior to the first phase tower's opening, construction of the 37-storey second phase tower reached its final height of 159 metres (521 feet), and is expected to be completed in mid-2016.

Amazon Tower II topped out in Seattle, image by Forum contributor SounderBruce

Details aren't quite as clear for a proposed 38-storey third phase, known as Amazon Tower III, planned for a site bounded by 7th Avenue, 8th Avenue, Blanchard Street, and Lenora Street. The planned 163-metre, 1.1 million-square-foot structure was originally slated for 2017 completion, though the project has yet to be approved and representatives from Amazon have remained tightlipped about the planned timeline in recent months, raising doubts about the plan.

Rendering of Amazon Towers, image courtesy of Seneca Group

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