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.

Sean Buckley

Oct. 7, 2025

3 min read

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.

6859a8512338b3cc7b659651 Dreamstime M 323694994

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.

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.
For more information on high-speed transmission systems and suppliers, visit the Lightwave Buyer’s Guide.
To stay abreast of fiber network deployments, subscribe to Lightwave’s Service Providers and Datacom/Data Center newsletters.