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Data Center Registry

Joliet Technology Center

Joliet, Will County, Illinois · Every PowerHouse and Hillwood case on our tracker

PermittedIn litigationAI likelyRecord updated August 3, 2026

Joliet Technology Center is a permitted data center in Joliet, Illinois (Will County), operated by HW Technology Park (Hillwood Investment Properties / PowerHouse Data Centers). The public record puts it at announced October 2025, 1.8 GW planned, 795 acres, a reported $20 billion investment. It is or has been the subject of litigation over its siting, permitting, or operation.

Every line on this page traces to a public source listed at the bottom. Where a figure was looked for and not found, the row says so. A blank is never a zero.

What our reporting adds

Our case file documents this site. Pending, Will County Circuit Court (filed May 18, 2026); motions heard September 8, 2026.

Facility record

Permitted

Operator
HW Technology Park (Hillwood Investment Properties / PowerHouse Data Centers)
Facility type
Data center, AI use likely
Location
Joliet, Will County, IL
Coordinates
41.4320, -88.1280
Power capacity
1.8 GW planned
Land
795 acres
Investment
$20 billion
Announced
October 2025
Utility
ComEd
Power source
Grid
Cooling
Not established from a public source
Water use
Not established from a public source
Jobs
700 permanent; 7,000 construction
Public subsidy
Not established from a public source
Community reception
In litigation
Source confidence
Confirmed by multiple independent sources or official documentation

Timeline from the record

Newest first. Record entries come from the filings and reports the registry cites. Coverage entries are headlines from publisher feeds we monitor daily, linked to the outlet; last checked September 14, 2026.

  1. March 2026
    Permitted
    Joliet City Council voted 8-1 to approve annexation and development plan on March 19, 2026 Source: NBC Chicago
  2. October 2025
    Proposed
    Hillwood announced 795-acre data center campus planned on south Joliet farmland; Plan Commission recommendation scheduled October 16, 2025 Source: Data Center Dynamics

Opposition and litigation at this site

Yes. Joliet Technology Center in Joliet, Will County, Illinois is or has been the subject of litigation over its siting, permitting, or operation. Pending, Will County Circuit Court (filed May 18, 2026); motions heard September 8, 2026.

How the community has taken it

Reception is a sourced signal, not an editorial judgment: in litigation means the facility is or has been the subject of a lawsuit related to its siting, permitting, or operation.

Pending, Will County Circuit Court (filed May 18, 2026); motions heard September 8, 2026. Joliet Technology Center: 795 acres, 24 buildings, 6,936,000 square feet, 1.8 gigawatts, valued at $20 billion; rezoned from agricultural to light industrial. Hundreds of residents filled council chambers and overflow rooms; concerns over water/electricity consumption, noise pollution, and proximity to residential areas. Post-approval lawsuit filed naming City of Joliet, PowerHouse, and Hillwood as defendants.

Source: NBC Chicago

Power and water

ComEd substation to be built at site, funded by HW Technology Park; developer seeking own electricity supply independently

Notes on the record

Coordinates approximate Jackson Township at Rowell and Bernhard Rds, south Joliet (~40 mi SW of Chicago), near Chicagoland Speedway. 24 two-story buildings planned. No confirmed hyperscale tenant as of permit date. Construction start targeted early 2027; first sub-campus by 2028. Construction jobs range reported as 7,000-10,000; permanent approximately 700.

What the record does not establish, and the document that would

In every fight on our tracker the decisive fact came out of a public records request. These are the requests for this site.

  • Cooling method and water use
  • Tax abatements or other public subsidy
Which document closes each gap
Cooling method and water use
The water service agreement, any groundwater appropriation permit, and the mechanical narrative in the site plan.
Tax abatements or other public subsidy
The abatement, PILOT, or development agreement approved by the county, city, or development authority, and the state's data center sales tax exemption certificate if one was issued.

Have one of these documents? Send it to us and we will add it to the record with attribution.

Our reporting on this site

Other sites within 30 miles

Distances are between recorded coordinates, many of which are a city or county centroid, so treat them as approximate. Cumulative load on one utility and one aquifer is the question a planning commission rarely asks.

Questions people ask about this site

Is there opposition to the Joliet Technology Center data center in Joliet?

Yes. Joliet Technology Center in Joliet, Will County, Illinois is or has been the subject of litigation over its siting, permitting, or operation. Pending, Will County Circuit Court (filed May 18, 2026); motions heard September 8, 2026.

Has anyone filed a lawsuit over the Joliet Technology Center data center?

Yes. This site is recorded as being in litigation. The case, the court, and the filings we hold are listed on this page under the timeline and the sources.

How much water does Joliet Technology Center use?

No water withdrawal figure for Joliet Technology Center is on record here. Water use is rarely published voluntarily; it usually surfaces through a utility service agreement or a state withdrawal permit, both of which are public records. We leave the number blank rather than estimate one.

Who operates Joliet Technology Center, and how big is it?

HW Technology Park (Hillwood Investment Properties / PowerHouse Data Centers) is the operator on record. Capacity on record is 1.8 GW. The site is recorded at 795 acres.

How to cite this page

SueDataCenters.org Data Center Registry, "Joliet Technology Center," updated August 3, 2026, https://suedatacenters.org/data-centers/joliet-technology-center-il.

Facility data from Compute Atlas (E. Kubiak), version 1.32.0 (September 7, 2026), licensed CC BY 4.0, record https://www.compute-atlas.com/facilities/joliet-technology-center-il, retrieved September 14, 2026.

Corrections with a public source are welcome at the Compute Atlas record or through our contact page. The whole registry is available as CSV and JSON under CC BY 4.0.

Sources for this record

As compiled and cited by Compute Atlas, with our own reporting appended. Archived links are used where the original has moved.

  1. 1.Data center planned on 795 acres of farmland in south Joliet, Illinois · Data Center Dynamics · retrieved July 6, 2026
  2. 2.City of Joliet approves plans for what could be the largest data center in Illinois · NBC Chicago · retrieved July 6, 2026
  3. 3.Joliet City Council approves plans for Illinois' largest data center · CBS Chicago · retrieved August 3, 2026
  4. 4.Joliet Approves Illinois' Largest Data Center, 795-Acre Project Moves Forward · Construction Owners · retrieved August 3, 2026
  5. 5.The Joliet Technology Center Lawsuit: Residents Challenge a $20 Billion, 1.8 Gigawatt Rezoning · SueDataCenters.org · retrieved September 2, 2026
  6. 6.Shaw Local: Lawsuit against Joliet data center heading to court hearing (August 18, 2026) · shawlocal.com · retrieved September 2, 2026
  7. 7.Shaw Local: Lawsuit challenges zoning, approval process for Joliet data center (May 26, 2026) · shawlocal.com · retrieved September 2, 2026
  8. 8.Lake and McHenry County Scanner: Lake County residents file lawsuit to block 472 acre data center campus in Grayslake (August 8, 2026) · lakemchenryscanner.com · retrieved September 2, 2026

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