CyrusOne CHI-11 Data Center Campus
Yorkville, Kendall County, ILDeveloper: CyrusOne
Also known as C1 Yorkville
- Rumored
- Proposed
- Approved
- Under construction
- Operating
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CyrusOne, through subsidiary C1 Yorkville LLC, is building a data center campus on approximately 228 acres in Yorkville, Illinois, originally approved in July 2024. In July 2026 the City Council approved a plan update reducing the campus to eight one-story buildings, with a $15 million up-front payment to the city and a 40,000-gallon-per-day water maximum; construction began in spring 2026.
- Site size
- 228 acres[1]
Key facts
Size & schedule
| Planned capacity | 480 MW [4] full electrical capacity allocation from ComEd Source excerpt“CyrusOne secured a full electrical capacity allocation of 480 megawatts from ComEd.” |
|---|---|
| Site size | 228 acres [1]Source excerpt“preliminary PUD Plan approval for approximately 228 acres across referred to as the Cyrus One CHI-11 data center campus” |
| Floor area | 2,163,800 sq ft [1] maximum footprint of the amended plan Source excerpt“reducing the development from nine (9) two-story buildings totaling approximately 2,451,200 square feet to eight (8) one-story buildings with a maximum footprint of approximately 2,163,800 square feet.” |
| Buildings | 8 [1] reduced from nine two-story buildings Source excerpt“reducing the development from nine (9) two-story buildings totaling approximately 2,451,200 square feet to eight (8) one-story buildings with a maximum footprint of approximately 2,163,800 square feet.” |
| Target completion | First building expected to be running by end of Q1 2028 [6]Source excerpt“The first building is expected to be up and running by the end of the first quarter of 2028.” |
How big is that? Data center sizes compared with football fields and Central Park.
Power
| Utility | ComEd [4] Utility pages: ComEd · data centers and bills Source excerpt“CyrusOne secured a full electrical capacity allocation of 480 megawatts from ComEd.” |
|---|
Water
| Water use | 40,000 gal/day [4] maximum after modifications; initially projected at 500,000 gallons per day Source excerpt“While the CyrusOne project was initially projected to consume 500,000 gallons of water per day, the modifications will now reduce it to a maximum of 40,000 gallons per day.” |
|---|---|
| Cooling | closed-loop [4]Source excerpt“The developer is installing a closed-loop cooling system which is far more water efficient than an open-loop air drying cooling system.” |
Money & incentives
| Payments / community benefits | $15 million up-front payment to the city on issuance of the first building permit [4] |
|---|
Figures are as stated by the cited source. Where sources disagree, each figure is shown.
Water and power
Water
- up to 40,000 gallons per day [4]Permit, contract or approved limit. Maximum after design modifications, with water-use limits imposed by the city.
Disclosed figures only, each as the cited source states it. Many are projections or permit limits, not metered use. How data center water and power use is measured, and every disclosed figure →
Timeline
Issues raised
- Public commenters raised concerns about noise and water consumption [5]
- The updated agreement adds more rigorous sound testing requirements [5]
- Roadway improvements are expected to be completed by Nov. 30, 2027, with railroad crossing work by Nov. 30, 2028 [6]
Issues are concerns and claims raised by the parties, officials or residents named in the cited sources. They are reported as attributed, not as findings by the Census.
Sources
- C1 Yorkville – Cyrus One CHI-11 Data Center Campus (Major PUD Amendment & Preliminary PUD Plan)United City of Yorkville · 2026 · government
- CyrusOne files for nine-building data center campus outside Chicago, IllinoisDatacenterDynamics · Jun 10, 2024 · news
- Yorkville City Council approves CyrusOne data center development in IllinoisDatacenterDynamics · Jul 11, 2024 · news
- 228-acre CyrusOne data center agrees to pay Yorkville $15 million up-front, city imposes water use limitsShaw Local · Jul 14, 2026 · news
- Yorkville approves CyrusOne data center plan updateWSPY News · Jul 15, 2026 · news
- Yorkville ready to expand Beecher and Faxon roads for CyrusOne data centerShaw Local · Aug 4, 2026 · news
Cite this page
Last updated Sep 23, 2026. Figures may change as records are updated — include the date you retrieved them.
| APA | Data Center Census. (2026). CyrusOne CHI-11 Data Center Campus. Retrieved from https://datacentercensus.com/dc/cyrusone-chi-11-yorkville-il |
|---|---|
| MLA | “CyrusOne CHI-11 Data Center Campus.” Data Center Census, Sep 23, 2026, https://datacentercensus.com/dc/cyrusone-chi-11-yorkville-il. |
| Link | https://datacentercensus.com/dc/cyrusone-chi-11-yorkville-il |
Republishing a figure or table? Attribute it to Data Center Census with a link to this page. The underlying data is downloadable as JSON and CSV; the press kit has standing figures and contact details.