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CARTIS

Joliet Technology Center

Joliet, Illinois, United StatesProposed
Evidence
Planned / design
1,800 MW
Updated
Oct 28, 2026

Joliet Technology Center is Hillwood’s proposed 795-acre data center campus in Joliet, Illinois. Project materials describe a $20 billion, 1.8 GW full-build program over roughly five to seven years, with closed-loop cooling, ComEd service and no planned onsite generation. The city conditionally approved annexation in March 2026, but building permits, utility delivery and construction remain phased. The 1.8 GW figure is a future design objective, not operating capacity.

Capacity

Reported capacity

Planned / design or future potential

1,800 MW

Source

Reported capacity

Planned / design or future potential

1,800 MW

Source

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Conditionally approved; phased developmentAnnounced or preconstruction

Joliet Technology Center is Hillwood’s proposed 795-acre data center campus in Joliet, Illinois. Project materials describe a $20 billion, 1.8 GW full-build program over roughly five to seven years, with closed-loop cooling, ComEd service and no planned onsite generation. The city conditionally approved annexation in March 2026, but building permits, utility delivery and construction remain phased. The 1.8 GW figure is a future design objective, not operating capacity.

Milestones (1)
City approved conditional annexation

Mar 19, 2026 · Recorded actual event

Completed · Permit approved

Source not linked

Participants

Hillwood Development Company

Developer

Sources by role
Developer (1)

Capital & incentives

Capital claims

Reported investment

Reported rounded

$20,000,000,000

Source

Site & development

Location context

Actual

Joliet Technology Center | Joliet | Illinois | US

Source

Location context

Actual

Joliet Technology Center | Joliet | Illinois | US

Source

Site area

Actual

795 acres

Source

Additional project facts

Lifecycle status

Actual

Proposed

Source

Capacity basis

Actual

1,800 MW future full build site capacity; not measured operating IT load.

Source

Lifecycle status

Actual

Proposed

Source

Capacity basis

Actual

1,800 MW is the proposed full build campus design over a multi year development period.

Source

Buildout duration

Actual

5–7 Years

Source

Permanent jobs

Reported rounded

700 jobs

Source

Infrastructure & permits

Technical details (2)
Electric grid

Planned or represented

1,800 MW

ComEd-served full-build concept.

Cooling system

Planned or represented

Closed-loop cooling; no onsite generation planned.

Other · Issued

Joliet Technology Center

City of Joliet

Mar 19, 2026

Sources (1)

Public-source research. Plans may change. See Evidence for sources and qualifications.