CyrusOne Allen Campus (DFW3-DFW5) Data Center — TX · Ask the Grid

Overview

Campus power: 50 MW; Critical IT Load · Reported
Status: Expanding; Construction started 2017
IT floor area: 580,000 sq ft; 3 reported buildings · Campus
Project cost: $73.0M; Estimated construction cost in the cited project filing.
Build window: 2017; The original Allen campus was announced in 2017 as a three-building plan. The first facility was described as 350,950 square feet, with two subsequent planned facilities of 619,100 and 412,800 square feet. The evidence does not identify separate commercial-operation dates for the buildings.
Campus buildout: 82,750 sq ft; DFW3 Building 1 expansion · Filed Expansion; Completion And Operating Status Not Confirmed

Project scope: CyrusOne announced the Allen campus in 2017 as a three-building development at 2300 Chelsea Boulevard. The campus comprises DFW3, DFW4, and DFW5 and is operating while expanding.
Power and grid: Total IT capacity at full build-out, as reported by CyrusOne.
Compute role: Operating CyrusOne data-center campus at 2300 Chelsea Boulevard comprising DFW3, DFW4, and DFW5, with 976,000 sq. ft. of technical space at full build-out and a documented DFW4 expansion. The campus is designed as a purpose-built, secure data-center facility.
Cooling and environment: Closed-loop, air-cooled chilled-water system. Water-free cooling system using air-cooled chillers; the operator reports zero water consumption for cooling. CRAH units and raised-floor air distribution in DFW3 data halls.

Original Allen campus first facility / DFW3

The original Allen campus was announced in 2017 as a three-building plan. The first facility was described as 350,950 square feet, with two subsequent planned facilities of 619,100 and 412,800 square feet. The evidence does not identify separate commercial-operation dates for the buildings.

DFW3 Building 1 expansion

In August 2022, CyrusOne filed to expand Building 1 at the Allen campus. The filing targeted an additional 80,620 square feet of data-hall space; separate reporting described the campus expansion as approximately 82,750 square feet. No explicit construction-completion or commercial-operation date is documented.

DFW4 new facility

Planning documents described a new single-story data center with a two-story office component measuring approximately 126,005 square feet. Reporting stated that work was expected to start in early 2024 and construction was scheduled for completion in late 2025. This scheduled construction completion is kept separate from commercial operation because no explicit operating date was found.

Power and grid

Capacity	Basis	Status	Scope	As of
50 MW	Critical IT Load	Reported	Campus	—
Total IT capacity at full build-out, as reported by CyrusOne.
60 MW	Campus Gross Power	Reported	DFW3	—
Power figure reported by a secondary site profile for CyrusOne Allen DFW3; this is kept separate from CyrusOne's 50 MW IT-capacity figure.
2.25 MW	Backup Generation	Reported	DFW3	—
Each of 24 critical diesel standby generators, according to the DFW3 specification listing; total generator capacity is not calculated.
1.25 MW	Backup Generation	Reported	DFW3	—
One diesel standby generator identified for house load, according to the DFW3 specification listing.

Utility: Oncor is the best-supported utility indication for the exact address, but the evidence does not explicitly confirm the retail utility-service relationship.
ISO / RTO: ERCOT
Substation: The Allen data-center park is served from three electrical substations owned by two different electrical providers; the individual substation names are not identified.
Redundancy: Distributed redundant UPS architecture with 4,500 kVA blocks, reported Tier 4 design, 2N generator redundancy, and campus-level access to dual electrical lines and three substations owned by two providers.
Backup generation: DFW3 is reported to have 24 critical 2.25 MW diesel generators and one 1.25 MW house-load diesel generator. A separate exact-address listing describes 2N generators.
Power sources: Utility/grid electricity serving the Allen data-center park through dual electrical lines · Carbon-free/renewable electricity procurement

Facility and development

IT floor area (sq ft): 580,000
Site area (acres): 90
Buildings: 3
Construction: CyrusOne announced the Allen campus in 2017 as a three-building development at 2300 Chelsea Boulevard. The campus comprises DFW3, DFW4, and DFW5 and is operating while expanding. A Building 1/DFW3 expansion was filed in August 2022 for approximately 80,620 square feet of additional data-hall space, and a separate approximately 126,005-square-foot DFW4 facility was planned to begin construction in early 2024 with construction scheduled for completion in late 2025. Actual completion and commercial-operation dates for the expansion work are not documented in the available evidence.
Facility class: Unknown
Cooling systems: Closed-loop, air-cooled chilled-water system. · Water-free cooling system using air-cooled chillers; the operator reports zero water consumption for cooling. · CRAH units and raised-floor air distribution in DFW3 data halls.
Cooling medium: Chilled water circulated in a closed loop, with heat rejected through air-cooled chillers.
Operating context: Operating CyrusOne data-center campus at 2300 Chelsea Boulevard comprising DFW3, DFW4, and DFW5, with 976,000 sq. ft. of technical space at full build-out and a documented DFW4 expansion. The campus is designed as a purpose-built, secure data-center facility.
Efficiency: WUE L Per Kwh 0.002 · design · Exact Asset · 2024-2025 corporate design methodology; exact DFW3 operating value not reported
Environmental commitments: Water-free cooling for the Allen campus, with zero water consumption for cooling. · Sourcing of renewable power; the operator identifies the campus as using 100% carbon-free/renewable electricity. · DFW3 is included in CyrusOne's net-positive-water portfolio.
Environmental impacts: Cooling-related water consumption is effectively zero; remaining water use is described only as minimal use for humidification and maintenance. · CyrusOne reports DFW3 as having negligible water consumption and as a positive contributor of water to the regional environment through its net-positive-water program.
Project cost (USD): 73,000,000
Land cost (USD): 137,200
Permits and dockets: TDLR TABS2024002257 — Cyrusne DFW4, Chelsea Boulevard, Allen, Texas; estimated cost $31.5 million; completion date September 1, 2024. · TDLR TABS2023002412 — CyrusOne Allen Load Adder, 2300 Chelsea Boulevard, Allen, Texas; estimated cost $41.5 million; completion date February 28, 2023. · TDLR TABS2025009744 — Level 2 Tenant Office Fit-Out at CyrusOne Allen DFW3, 2300 Chelsea Boulevard; $500,000 renovation/alteration, 1,978 square feet, January 6–March 31, 2025; review complete. · City of Allen Planning and Zoning Commission record — Cyrus One Allen replat, generally east of Chelsea Boulevard and north of Allen Commerce Parkway, on approximately 65.599 acres.
Transactions: 2017 City of Allen land transaction: CyrusOne, LLC or an affiliate was to purchase a 24.362-acre tract for $137,200. · 2026 reported financing transaction: CyrusOne was slated to obtain a $1.05 billion fixed-rate, five-year CMBS loan secured by its adjacent DFW3 and DFW4 data centers in Allen. The available excerpt does not identify the lender or confirm closing.
Public hearings: On December 7, 2017, the City of Allen Planning and Zoning Commission agenda included a public hearing and replat for Lot IR, Block 1, Cyrus One Allen, generally east of Chelsea Boulevard. · On October 17, 2023, the City of Allen Planning and Zoning Commission agenda included a public hearing on establishing Planned Development regulations for Lots 1R, 2R1, and 3R, Block 1, Cyrus One Allen, at the southwest corner of Chelsea Boulevard and Ridgeview Drive. · On April 16, 2024, the City of Allen Planning and Zoning Commission agenda included a Cyrus One Allen replat for approximately 63.505 acres of Lot 1R1, Block 1. The associated staff material states that the replat added fire-lane access and utility easements to allow construction of the data center and that staff recommended approval.
Community benefits: Allen's mayor said the campus would provide additional sales and property taxes benefiting the city and Allen schools. · The Allen Economic Development Corporation described the project as potentially about a $1 billion investment, a major economic benefit, and a strong community partnership. · The mayor said the facility's environmentally friendly design would minimize natural-resource use and have nominal impact on city services. · CyrusOne's official campus page identifies water-free cooling and renewable-power sourcing as sustainability features of the Allen campus.

Identity and campus: CyrusOne Allen Campus (DFW3-DFW5)
Also reported as CyrusOne Allen, Allen, TX: DFW3-DFW5, DFW3-DFW5.
Regulatory record: The CyrusOne Allen campus at 2300 Chelsea Boulevard comprises DFW3-DFW5. Documented regulatory activity includes the 2023 TDLR filing for the DFW4 shell and upfit, a 2022/2023 TDLR filing for the DFW3 Building 1 load-adder expansion, and a 2025 TDLR filing for a DFW3 tenant-office fit-out. The available evidence also shows City of Allen planning and land-development records for the campus. No site-specific executed tax-abatement, utility, or power-purchase agreement was identified.

CyrusOne Allen Campus (DFW3-DFW5)

CyrusOne Allen Campus (DFW3-DFW5)

Overview

Original Allen campus first facility / DFW3

DFW3 Building 1 expansion

DFW4 new facility

Power and grid

Facility and development

Timeline

Organizations

Sources

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