CoreSite breaks ground on Denver DE3 data center

The data center provider is expanding its footprint in the Denver market while supporting local community organizations.
Oct. 7, 2025
3 min read
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Key Highlights

  • The DE3 data center is a 180,000-square-foot facility, marking CoreSite's third in downtown Denver, with plans for a 600,000-square-foot campus expansion by 2026.
  • Located at 4900 Race Street, DE3 will be interconnected with existing facilities DE1 and DE2 via high-count dark fiber, enhancing connectivity and performance.
  • CoreSite's expansion aims to meet growing demand for AI, cloud, and enterprise workloads, reinforcing Denver's reputation as a leading tech hub.
  • The company supports local community initiatives, including investments in education and digital literacy programs in Denver's GES neighborhoods.
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CoreSite has unveiled its new DE3 data center, expanding its capability to address the Denver metro area and meet demand for high-density, high-performance compute environments that power artificial intelligence (AI), cloud, and other enterprise workloads.

Located at 4900 Race Street in Denver, CoreSite’s DE3 data center will be a 180,000-square-foot facility and will mark the provider’s third facility in downtown Denver.

DE3 is the first purpose-built colocation data center constructed in Denver in the last two decades and will be linked with high-count dark fiber to CoreSite’s existing DE1 and DE2 data centers. CoreSite’s data centers are multi-tenant colocation facilities that provide individualized space, power, cooling and connectivity services to accommodate multiple companies within the same building.

“On a citywide scale, DE3 will provide customers with the interconnection and improved computing performance needed to thrive, strengthening Denver’s reputation as a tech hub and driving economic growth,” said Adam Post, SVP of Corporate Development and Finance at CoreSite.

www.CoreSite.com
CoreSite's new DE3 data center, located at 4900 Race Street in Denver, will be a 180,000-square-foot facility and is targeted for availability in 2026.

CoreSite's new DE3 data center, located at 4900 Race Street in Denver, will be a 180,000-square-foot facility and is targeted for availability in 2026.

Growing Denver footprint

CoreSite continues to enhance its Denver data center footprint.

Upon completion, CoreSite’s Denver data center campus expansion (DE3) will deliver approximately 600,000 square feet with 60 critical megawatts of power.

CoreSite said the new facility is targeted for availability in 2026.

The company’s current Denver footprint includes two facilities located in the heart of downtown Denver. DE1, the recently purchased Denver Gas and Electric Building, one of the most interconnected buildings in the Rocky Mountain Region, is located at 910 15th Street, and DE2 is located at 639 E. 18th Ave.

Supporting the local community

Providing data center services is just one part of CoreSite’s mission in Denver.

As its hometown, with headquarters in Downtown Denver, CoreSite has positioned itself as a company that supports local organizations, including the Globeville, Elyria and Swansea (GES) neighborhoods through this new data center location.

During the unveiling of the new site, CoreSite announced investment in the Jack A. Vickers Boys and Girls Club, where the company, together with parent company American Tower, cofounded Denver’s first Digital Community.

Digital communities are connected spaces created by American Tower that offer community members access to education, career skilling, financial literacy and healthcare services. The investment includes refreshing the Club’s STEM room with new computers and accessories, iPads, a 3D digital printer and more.

CoreSite, along with Schneider Electric, DPR Construction, Power Distribution Systems and Power Systems West, pledged an additional $25,000 contribution to local community organizations serving the GES neighborhoods.

For related articles, visit the Data Center Topic Center.
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About the Author

Sean Buckley
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Sean Buckley

Sean is the Editor-in-Chief of Lightwave. He establishes and executes Lightwave's editorial strategy across its website, email newsletters, events, and other information products. Before coming to Lightwave in July 2023, he served as editor of Broadband Communities. Earlier, he served as senior editor of FierceTelecom and the editor of the former Telecommunications Magazine. He got his start in the optical industry in 1998 when he became the editor of enterprise and optical networks at Information Gatekeepers. He has a BA in English from the University of Massachusetts, Boston, and lives in Dracut, Mass, with his wife, two sons, and his cat, Dove. 

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