Projects
Compass Datacenters campus at former Sears headquarters (Hoffman Estates)
Hoffman Estates, Cook County
273 acres
🕒 Dec 2025: Village issued permits; walls for the first two data center buildings went up.
Stopped or cancelledPlum Farms rezoning for possible data center (Higgins Road and Route 59)
Hoffman Estates, Cook County
186 acres
🕒 June 30, 2026: Landowner withdrew its rezoning request after more than 3,250 people signed a petition a…
Stopped or cancelledBrennan data center campus (Barrington Hills, south of Penny Road)
Barrington Hills, Cook County
🕒 Jan 28, 2026: Brennan withdrew its $2 billion data center plan and cancelled a planned public presenta…
Status unclearRelated Digital data center at former U.S. Steel South Works (Chicago)
Chicago, Cook County
🕒 Aug 2026: Residents protested the neighboring quantum park, fearing a data center; Related Midwest…
Reported in the news, not confirmed yet
ProposedData center conversion at 300 West Adams Street (Chicago Loop)
Chicago, Cook County
🕒 Aug 6, 2026: The Landmarks Commission's permit review committee approved turning the lower half of th…
Reported in the news, not confirmed yet
Being builtHydraVault AI data center (2538 S. Wabash Ave., Chicago)
Chicago, Cook County
🕒 Oct 28, 2025: HydraVault said it got a construction permit and began work.
Reported in the news, not confirmed yet
Approved, not built yetStream Data Centers campus (Landmeier Road area, Elk Grove Village)
Elk Grove Village, Cook County
🕒 2025: ComEd broke ground on a 260-megawatt substation for the Stream campus.
Reported in the news, not confirmed yet
Approved, not built yetNexstar data center campus at WGN radio transmitter site (Rohlwing Road)
Elk Grove Village, Cook County
🕒 Jan 2026: Village Board extended the deadline to start the first building to Sept. 30, 2027; the p…
Reported in the news, not confirmed yet
Being builtTA Realty ORD01 data center (Elmhurst and Old Higgins roads)
Elk Grove Village, Cook County
47 acres
🕒 Oct 3, 2025: Demolition was underway to make way for the 47-acre data center campus.
Reported in the news, not confirmed yet
Being builtCloudHQ data center campus at former United Airlines offices (Mount Prospect)
Mount Prospect, Cook County
50 acres
🕒 Oct 28, 2025: Village Board took up CloudHQ's request to change the plan to two three-story buildings,…
Reported in the news, not confirmed yet
Local votes and rules
📌 Other · Chicago
Mayor signed Executive Order 2026-5. It adds a review of power, water, backup generators, air pollution and noise for new data centers, and asks the city council to pass a temporary pause. Air and noise rules are due about November 9, 2026; a task force reports by March 15, 2027.
✋ Turned down · Hoffman Estates
The village plan commission voted 4-2 against recommending a rezoning of the 186-acre Plum Farms land to manufacturing, which would have allowed a Karis Critical data center. The developer then withdrew the request before the village board voted.
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