T5 Chicago IV (CHI IV)

Facility record

Lifecycle

Under constructionSource-reported lifecycle

Location precision

approximate

Address as listed

Not published

Coordinates

42.3442, -88.0417

Serving utility, source-reported

ComEd

Operational capacity, source-reported

Not published

Planned capacity, source-reported

1200 MW

Source record updated

2026-10-28

Source-reported capacity; not metered consumption. Review underlying documents and notes. Planned capacity may include future phases and is not added to operational capacity here. The source may use facility, grid-feed or IT capacity definitions; consult the linked documents.

Coordinate precision is a source label, not an independent parcel survey. A marker does not confirm utility territory or establish an effect on residential bills.

Reported lifecycle history

1. 2026Proposed

   T5 announced its CHI IV campus in Grayslake (Lake County): up to 1.2 GW IT / 1.6 GW secured utility power; Phase 1 (3 × 60 MW) targeted Q4 2027

   Underlying source
2. 2026-05-07Under construction

   Village officials maintained that approvals for the T5 Chicago IV campus were in order, and earthmoving had started on the first piece of the site (Hoodline, May 7, 2026); residents said they plan to pursue appeals.

   Underlying source

Source notes

CHI IV in Grayslake, Lake County (~40 mi north of Chicago): up to 1.2 GW IT capacity with 1.6 GW secured ComEd power; envisions 20 × 60 MW buildings, Phase 1 (3 × 60 MW) targeted Q4 2027. Earthmoving had started on the first piece of the site by May 2026 (Hoodline), and the record is listed as under construction. The Village of Grayslake's FAQ, updated August 18, 2026, says the approved campus is located on 473 acres in the Peterson Road corridor; T5's May 2024 announcement described a 160-acre site supporting up to 480 MW of critical IT capacity, which is a planned figure, not capacity in operation. Distinct from T5's Palmetto, GA campus. Coordinates are the Grayslake area centroid.

1.6 GW of secured ComEd utility power via an on-site substation.

Sources and provenance

• T5 plans five gigawatt-scale data center campuses, announces Chicago campus · source retrieved 2026-07-07
• Despite village approvals, legal action expected against Grayslake data center · source retrieved 2026-08-03
• Grayslake T5 Data Center Moves Ahead Amid Local Protests · source retrieved 2026-07-18
• Data Center Could Be Largest Lake County, Ill., Development · source retrieved 2026-09-12
• Approved T5 Data Center Campus FAQ (updated June 5, 2026) · source retrieved 2026-08-03
• Data Center Investment Program 2025 Annual Report — T5@Chicago IV, LP, Grayslake (2025 MOU) · source retrieved 2026-09-25
• Approved Village of Grayslake Data Center Campus FAQs (updated 18 August 2026) · source retrieved 2026-09-12
• Illinois Data Centers — T5 Chicago IV, Grayslake, 1.2 GW IT (Phase 1: 480 MW) · source retrieved 2026-09-25
• Correction source · source retrieved 2026-10-15

Power Wars capture: 2026-11-02. Compute Atlas, CC BY 4.0. Entries are not independently verified by Power Wars unless stated.