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Data center campus · Jackson Township near Rowell and Bernhard roads, annexed to Joliet, Will County, Illinois

Joliet Technology Center

Approved as of March 19, 2026

A 795-acre, 24-building data center campus that Joliet annexed and rezoned in March 2026 after months of resident opposition; a lawsuit challenges the approval. Also known as: PowerHouse Joliet.

Cite← Illinois data centers
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Power1,800MW reported · stated
Site795acres

Who is behind it

ProjectJoliet Technology CenterAlso: PowerHouse Joliet
Developer and teamPowerHouse Hillwood Holding LLC (PowerHouse Data Centers and Hillwood)
End userNot found in the recordsNot yet named in any record or credited report we have found.

The record, newest first

  1. A residents' group sued the city and the developer entities in Will County Circuit Court, alleging notice, Open Meetings Act and due process defects and asking that the approval be declared void. (The Herald-News (Shaw Local), May 26, 2026)

  2. The City Council voted 8-1 to approve the annexation agreement and rezoning for the 795-acre campus; annexation takes effect only once the developer buys the land. (City of Joliet, March 19, 2026; The Herald-News (Shaw Local), March 20, 2026; The Real Deal, March 20, 2026; City of Joliet, March 2026)

  3. The Joliet Plan Commission recommended annexation, light industrial zoning and a preliminary planned unit development at a special meeting. (DatacenterDynamics, March 6, 2026; The Herald-News (Shaw Local), March 3, 2026)

  4. The proposal was pulled from the Plan Commission agenda after residents raised concerns about power and water demand, and it was then on hold for months. (The Herald-News (Shaw Local), March 3, 2026)

Conflicts and open questions

  • Coordinates approximate, based on the reported Rowell Road and Bernhard Road area in Jackson Township, south of Joliet.
  • Plans call for four sub-campuses of six two-story buildings (24 buildings); the first sub-campus is slated for 2028.
  • Investment of $20 billion is from The Real Deal; the city bulletin gives tax projections, not a construction cost.
  • The draft annexation agreement (unsigned) lapses if the land purchase is not closed by April 1, 2027, with up to two six-month extensions available at $10 million each.
  • The city bulletin describes Joliet as lying in Will and Kendall counties; the site itself is in Jackson Township, Will County.

The full record

Status note
The Joliet City Council approved the annexation agreement 8-1; a lawsuit filed in Will County in May 2026 by a residents' group asks that the approval be declared void.
Power note
Developer estimate of power use at full buildout (1.8 GW), not a stated IT load; the draft annexation agreement gives no MW figure.
Evidence
Primary public records
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.