Under construction

CoreSite Denver (DE3)

CoreSite (American Tower), a private operator, is building CoreSite Denver (DE3) in Denver, CO. Reported capacity is 18 MW. New ~170,000-180,000 sq ft building at 4900 Race Street, Denver -- the first colocation data center built new in Denver in two decades, and phase 1 of a 3-building/590,000+ sq ft/60MW CoreSite campus expansion adjoining existing DE1/DE2. Topped out October 2025; targeted for operational availability sometime in 2026 but not confirmed open as of Sept 2026.

18 MWPlanned capacity

Photo: CoreSite

Project status

Announced
Permitting
Under construction
Operational

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What’s next

Election Day is in 10 days.

Tuesday, November 3
Election Day
Monday, November 2CO
Data center ordinance in the works in Warrick Co.; Meeting set for Nov. 2

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Records and documentation

Colorado state legislation

AB1577 - Data centers: monthly reportingLegislationdatacenterbans.comRequires monthly reporting by data centers.Download
HF16 - Data center regulatory bill (1st Special Session)Legislationdatacenterbans.comRegulatory bill governing data centers passed in a special legislative session.Download
SB102 - Data Center Accountability ActLegislationdatacenterbans.comEstablishes accountability requirements for data center operators.Download
Council Bill No. 26-0431 (Data Center Moratorium)Moratoriumdenver.legistar.comDenver moratorium on data center approvals, enacted by unanimous vote effective May 21, 2026.Download
Resolution No. 2026-02-27-01 (Moratorium)Moratoriumphillipscounty.colorado.govPhillips County, Colorado resolution enacting a data center development moratorium, February 27, 2026.Download
HB1030 - Data Center & Utility ModernizationLegislationlegiscan.comIn committee May 7, 2026Description comingDownload

Site details

Operator: CoreSite (American Tower)
County: Denver County, CO
Capacity: 18 MW
Address: Denver, CO
Stage: Under construction

Size: not on file

Map

Photos

Photo: CoreSite
Google Street View
Google Street View
Google Street View
Google Street View
Google Street View
Google Street View
Photo: CoreSite
Are you brave enough to join Denver's data center working group?Westword
Denver City Council approves one-year data center banThe Denver Post
An $8 billion Treasury break helped Meta’s tax rate hit 2%. Senators want data center tax answersFortune
The states with the fewest and most data centers, rankedBusiness Insider
Finns Are Seething After Google Illegally Toppled 250,000 Trees for a Data CenterMother Jones
Google offer to pay others to help data center powerArkansas Online
This bill would make data centers pay their own way for powerSalt Lake City Deseret News