Grayslake IL data center lawsuit (2026)
Preservation of Community Well-Being Collective v. Village of Grayslake, T5 Data Centers and Alter Asset Management — Suit to Void Approvals for $18B Data Center Campus (filed July 31, 2026)
Grayslake, IL · Preservation of Community Well-Being Collective et al. v. Village of Grayslake et al. (Ill. Cir. Ct., filed July 31, 2026)
- Status
- Blocked / in litigation
- Applies to
- Village of Grayslake; T5 Data Centers; Alter Asset Management
- Enforced by
- Illinois circuit court (Lake County, presumed)
Residents sued Grayslake and the developers of a planned $18 billion, 472-acre, 18-building data center campus, saying village officials deliberated improperly behind closed doors and approved a use the zoning code does not allow. They want the court to cancel the approvals and the development agreement and block new permits.
Who is protected: Grayslake-area residents (if plaintiffs prevail)
Legal detail
Suit filed 2026-07-31 (court and case number not stated in source; presumably Lake County Circuit Court). Claims: Illinois Open Meetings Act violations (closed-door deliberations, private communications); Grayslake zoning code does not expressly permit data centers; 2024-2025 approvals violated due process. Relief: nullify prior approvals, enjoin issuance of new permits, cancel the village-T5 development agreement. Project: $18B, 472 acres in the Cornerstone business park, 18 buildings; early site work began 2025; T5 paused a wetland remediation permit application (~16 acres) in July 2026.
Key facts
| Jurisdiction | Grayslake, IL |
|---|---|
| Level | City / local |
| Citation | Preservation of Community Well-Being Collective et al. v. Village of Grayslake et al. (Ill. Cir. Ct., filed July 31, 2026) |
| Private right of action | No, agency enforcement only |
| Penalties | Requested relief: voiding of approvals and development agreement; injunction |
| Topics | data-center siting and energy · AI disclosure and transparency |
| News report | Illinois residents sue to stop $18B data center — The Cool Down via Yahoo News (citing Daily Herald) |
Related data-center siting and energy rules elsewhere
- Superior WI Data Center Moratorium (1-year) · In effect
- Dane County WI Hyperscale Data Center Moratorium · In effect
- Madison WI Data Center Moratorium (1-year) · In effect
- Manitowoc County WI Data Center Moratorium · In effect
- WA SB 5982 (Data Center / Clean Energy) · In effect
- Dayton OH data center moratorium (180-day, Apr 2026) · In effect
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