Data center fact sheet · county
Lake County, Illinois
As of . Latest dated change shown: Sep 8, 2026. Source: Data Center Census (datacentercensus.com), CC BY 4.0.
- Tracked projects
- 1
- 1 approved
- Planned capacity
- 1.55 GW
- 1 project publishes a figure; 0 projects publish none
- Moratorium actions
- 1
- Upcoming hearings
- 1
Projects
| Project | Status | Planned capacity | Developer |
|---|---|---|---|
| T5 @ Chicago IV Grayslake | Approved | 1.55 GW | T5 Data Centers |
Pauses and local rules
| Jurisdiction | Action | When | Length |
|---|---|---|---|
| Lake County[1] | Adopted | Sep 8, 2026 | eight months |
Upcoming votes and hearings
- Oct 30, 2026 Lake County Circuit Court: Initial status hearing in lawsuit challenging the village's approvals (9 a.m., Courtroom 301) (T5 @ Chicago IV)[2]
Latest changes
- Sep 1, 2026 Village issues first building permit, for an 800,000-square-foot facility (T5 @ Chicago IV)[2]
- Aug 2026 Nine Lake County residents and Preservation of Community Well-being Collective LLC file suit challenging the village's approvals (T5 @ Chicago IV)[2]
- May 2025 Grayslake Village Board completes approvals of the campus (approved between September 2024 and May 2025) (T5 @ Chicago IV)[2]
- May 2, 2024 T5 announces a 480 MW data center campus in Grayslake (T5 @ Chicago IV)[3]
Notes
Planned capacity adds each record’s first published figure for projects not cancelled or denied; projects that publish none are never estimated. IT load is the power reaching computing equipment, so a total that includes it understates total power. Locations may be approximate where a record gives only a town or county. Counts cover tracked projects, not every data center.
Sources
- Lake County, Illinois, “Lake County Board Approves Moratorium on Data Centers in Unincorporated Lake County”, Sep 8, 2026. https://content.govdelivery.com/accounts/ILLAKE/bulletins/42810a1
- Lake and McHenry County Scanner, “Grayslake issues first permit for construction to begin on mega data center campus as lawsuit seeks to block development”, Sep 1, 2026. https://www.lakemchenryscanner.com/2026/09/01/grayslake-issues-first-permit-for-construction-to-begin-on-mega-data-center-campus-as-lawsuit-seeks-to-block-development/
- T5 Data Centers, “T5 Data Centers Announces Further Expansion into Chicago Suburbs with New 480 MW Data Center Campus”, May 2, 2024. https://t5datacenters.com/resources/t5-data-centers-announces-further-expansion-into-chicago-suburbs-with-new-480-mw-data-center-campus/
Each project record lists all of its sources and excerpts. Cite as: Data Center Census, “Data center fact sheet: Lake County, Illinois,” October 14, 2026, https://datacentercensus.com/fact-sheets/illinois/lake-county.