# CyrusOne Allen Campus (DFW3-DFW5)

ERCOT data center · https://askthegrid.com/assets/facilities/cyrusone-allen-campus-dfw3-dfw5

CyrusOne operates the Allen Campus (DFW3–DFW5), a 90-acre, three-building campus in Allen, Texas, announced in 2017 with a reported full build-out of 50 MW critical IT load. DFW3 is operational and reports 60 MW gross power with 24 critical diesel generators; expansion filings and new facility planning are in progress.

## Identity and location

- Operating status: expanding
- Asset scope: campus
- Location: TX
- Operator: CyrusOne (campus) — https://www.cyrusone.com/

## Power and grid context

- Critical it load: 50 MW · reported · campus — Total IT capacity at full build-out, as reported by CyrusOne.
- Campus gross power: 60 MW · reported · building · 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.
- Backup generation: 2.25 MW · reported · building · DFW3 — Each of 24 critical diesel standby generators, according to the DFW3 specification listing; total generator capacity is not calculated.
- Backup generation: 1.25 MW · reported · building · DFW3 — One diesel standby generator identified for house load, according to the DFW3 specification listing.
- ISO/RTO: ERCOT
- Electric utility: Oncor is the best-supported utility indication for the exact address, but the evidence does not explicitly confirm the retail utility-service relationship.
- 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.

## Development

- Site status: Operating campus with documented expansion activity; DFW3 is reported fully operational, while the status of the later expansion work is not confirmed.
- Site area: 90 acres
- 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.

## Compute and operations

- Facility classes: unknown
- Critical IT load: 50 MW
- 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.

## Sources

- [http://cyrusone.com/data-centers/north-america/allen-texas](http://cyrusone.com/data-centers/north-america/allen-texas)
- [http://datacenterdynamics.com/en/news/cyrusone-files-to-build-data-center-in-allen-texas](http://datacenterdynamics.com/en/news/cyrusone-files-to-build-data-center-in-allen-texas)
- [CyrusOne Allen DFW3 Data Center](https://baxtel.com/data-center/cyrusone-allen-dfw3)
- [Fetched web page](https://d3n9y02raazwpg.cloudfront.net/cityofallen/1cfa0d19-8f9f-11ee-a93d-0050569183fa-fb5124fc-752c-4ab2-82c2-b94dbf49ecf3-1712952296.pdf)
- [CyrusOne DFW3 - Building 1 | 2300 Chelsea Boulevard, ...](https://datacenterhawk.com/marketplace/providers/cyrusone/2300-chelsea-boulevard/dfw3-building-1)
- [Fetched web page](https://granicus_production_attachments.s3.amazonaws.com/cityofallen/eba8de77aefe1d7bb8c0741980c804ec0.pdf)
- [CyrusOne LLC v. The City of Aurora, Illinois et al](https://law.justia.com/cases/federal/district-courts/illinois/ilndce/1:2018cv00272/348117/226/)
- [CyrusOne Allen Enterprise Campus: 50 MW data center in ...](https://morethanjustparks.com/data-center-tracker/cyrusone-allen-enterprise-campus-tx--b06bb7ff-c59f-4890-a8d0-ee724973d00b)
- [O-3468-5-17 - Laserfiche Public Portal - Allen, Texas](https://publicrecords.cityofallen.org/WebLink/DocView.aspx?id=11633&dbid=0&repo=Allen)
- [O-3514-9-17 - Laserfiche Public Portal - Allen, Texas](https://publicrecords.cityofallen.org/WebLink/DocView.aspx?id=12677&dbid=0&repo=Allen)
- [Planning and Zoning Commission - 2017 - 11/07 - Regular](https://publicrecords.cityofallen.org/WebLink/DocView.aspx?id=12783&dbid=0&repo=Allen)
- [2018-2019 Budget 1.28.2019 Interactive ...](https://publicrecords.cityofallen.org/WebLink/DocView.aspx?id=28572&dbid=0&repo=Allen)
- [Fetched web page](https://swagit-attachments.granicus.com/archive/agendas/120445/original/11-7%20AllenP%26Z.pdf)
- [Agenda City of Allen Planning and Zoning Commission ...](https://swagit-attachments.granicus.com/archive/agendas/120445/original/11-7%20AllenP&Z.pdf)
- [CyrusOne Plans $32M Data Center in Allen](https://therealdeal.com/texas/dallas/2023/10/05/cyrusone-plans-32m-data-center-in-allen/) — The Real Deal · 2023-10-05
- [Data Centers in Allen, TX](https://www.allenedc.com/developments/data-centers)
- [CyrusOne Lines Up $1B CMBS Loan For 2 Data Centers In ...](https://www.bisnow.com/dallas-ft-worth/news/data-center-capital-markets/cyrusone-lines-up-1b-cmbs-loan-for-two-data-centers-in-allen-134372)
- [Oncor Electric Services | Texas | Read Reviews + Get a Bid | BuildZoom](https://www.buildzoom.com/contractor/oncor-electric-services)
- [Smart Water Meters | Allen, TX](https://www.cityofallen.org/departments/community_services/utility_billing/smart_water_meters.php)
- [Allen, TX: DFW3-DFW5 | CyrusOne](https://www.cyrusone.com/data-centers/north-america/allen-texas)
- [Fetched web page](https://www.cyrusone.com/hubfs/Website%20Documents%202025/2024_CyrusOne_Sustainability_Report.pdf)
- [Fetched web page](https://www.cyrusone.com/hubfs/Website%20Documents%202025/2025%20Sustainability%20Report.pdf?hsLang=en)
- [CyrusOne plans another data center expansion at its 90-acre Allen campus](https://www.dallasnews.com/business/real-estate/2023/10/04/cyrusone-plans-another-data-center-expansion-at-its-90-acre-allen-campus/) — The Dallas Morning News · 2023-10-04
- [CyrusOne Allen Load Adder - Allen, TX | datacenter.fyi](https://www.datacenter.fyi/public-record/cyrusone-allen-load-adder-6256a63d)
- [CyrusOne files to build data center in Allen, Texas - DCD](https://www.datacenterdynamics.com/en/news/cyrusone-files-to-build-data-center-in-allen-texas/) — Data Center Dynamics · 2023-10-06
- [CyrusOne signs 40MW wind and solar PPA with Gexa ...](https://www.datacenterdynamics.com/en/news/cyrusone-signs-40mw-wind-and-solar-ppa-with-gexa-energy-in-texas/)
- [DCF Tours: CyrusOne Dallas DFW3 Data Center, Allen, Texas | Data Center Frontier](https://www.datacenterfrontier.com/site-selection/article/33017118/dcf-tours-cyrusone-dallas-dfw3-data-center-allen-texas) — Data Center Frontier · 2024-01-05
- [Dallas Data Centers - 192 Facilities from 51 Operators](https://www.datacentermap.com/usa/texas/dallas/)
- [CyrusOne DFW3 - Allen - Specs](https://www.datacentermap.com/usa/texas/dallas/cyrusone-dfw3/specs/)
- [CyrusOne Breaks Ground on New Data Center Campus in Allen, TX](https://www.prnewswire.com/news-releases/cyrusone-breaks-ground-on-new-data-center-campus-in-allen-tx-300546702.html) — PR Newswire / Allen Economic Development Corporation · 2017-10-31
- [DFW18 Data Center Air Permit Registration | PDF | Exhaust Gas | Particulates](https://www.scribd.com/document/895223432/AIR-NSR-180711-394940-Permits-Public-20250701-Initial-Application-7796249)
- [Project Details](https://www.tdlr.texas.gov/TABS/Search/Print/TABS2024002257)
- [Project Details - TDLR TABS](https://www.tdlr.texas.gov/TABS/Search/Project/TABS2023002412)
- [TDLR TABS - Project Details](https://www.tdlr.texas.gov/TABS/Search/Project/TABS2025009744)

## Data quality

- The site is directly identified by CyrusOne as the Allen, Texas DFW3-DFW5 campus at 2300 Chelsea Boulevard, Allen, Texas 75013.
- The evidence supports treating the 2023-2024 DFW4 work as part of the exact Allen campus: the TDLR filing names DFW4, and local reporting places the project at Chelsea Boulevard and Ridgeview Drive.
- The public record includes hearings and replat actions, but the retrieved materials do not consistently provide final vote outcomes for every Cyrus One Allen agenda item.
- No tenant, cloud customer, utility, MW demand, water-consumption figure, PUE, WUE, or equipment claim is reported because the exact-site evidence retrieved does not establish those details for this request.
- A search result alleging moderate community opposition was not used because it was an unsupported secondary tracker claim and did not provide authoritative documentation.
- Power values retain their reported, requested, contracted, energized, gross-campus, or critical-IT basis.

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Canonical page: https://askthegrid.com/assets/facilities/cyrusone-allen-campus-dfw3-dfw5
Profile generated: 2026-07-27T23:46:05.167448Z
Source: Ask the Grid — https://askthegrid.com/