Duwamish area data center plan doubles in size

News ClipSeattle DJC.com·Seattle, King County, WA·6/22/2026

A data center project proposed by the Carlyle Group in Seattle's Duwamish area has doubled in size and value to nearly $440 million. The project has entered the review process, reflecting a nationwide trend of increased data center construction spending.

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The Carlyle Group is proposing a large data center development in Seattle's Duwamish area, situated just south of the Spokane Street Viaduct. The project, initially valued at $220 million, has reportedly doubled in size. This expansion was first reported in April and the project has since entered the official review process. The increased investment in this data center development aligns with a broader national trend where spending on data center construction has surpassed new office development.