CloudHQ Mount Prospect Under construction
Village hired outside engineering firm to handle CloudHQ's permit reviews; also set up a dedicated public fact-check portal, signaling active community scrutiny.
Key facts
- Operator
- CloudHQ
- Location
- Mount Prospect, Illinois
- Stage today
- Under construction
What to do next
Next step: Under construction — pull the approved conditions and permits and hold the builder to them; an expansion or a new building reopens the record.
What has happened so far (12 events)
- 2021-06-01financing
CloudHQ acquired the 49.7-acre former United Airlines world headquarters campus in Mount Prospect, Illinois. · source - 2021-12-01filing
Mount Prospect Village Board held a first reading of an ordinance granting a preliminary plat of subdivision and conditional use for CloudHQ proposed data center campus. · source - 2021-12-10announcement
Daily Herald reported details of CloudHQ proposed $2.5 billion redevelopment of the former United Airlines headquarters site into a data center campus. · source - 2022-06-01rezoning
Mount Prospect Village Board held a first reading of an ordinance granting a conditional use for a final planned unit development and final plat for the three-building CloudHQ data center campus. · source - 2022-08-23construction
CloudHQ and ComEd broke ground on the $2.5 billion, 1.5 million-square-foot hyperscale data center campus on the former United Airlines site, with three buildings (each over 80MW) and a new ComEd substation. · source - 2022-08-23coverage
ComEd and CloudHQ jointly announced the groundbreaking, citing a first-of-its-kind onsite substation, projected 1,000+ construction jobs per building, and first building completion targeted for 2024. · source - 2022-11-15incentive
Mount Prospect Village Board approved an inducement resolution supporting CloudHQ application for a Cook County Class 6b property tax incentive, assessing the property at 10% of market value for the first 10 years. · source - 2024-12-16utility
Village Manager said the ComEd substation needed to power the CloudHQ site was expected complete by June; the village board also considered a $60,000 lobbying contract amid lingering state legislative hurdles. · source - 2025-10-28rezoning
Mount Prospect Village Board adopted an ordinance amending the conditional use, allowing CloudHQ to revise from three two-story buildings to two three-story buildings, a second substation, and mechanical yard; first building retargeted to 2027. · source - 2025-11-17incentive
Mount Prospect trustees prepared to approve $3 million in CloudHQ developer contributions toward public improvements: multiuse path, street lighting, and Park District splash pad. · source - 2025-11-18coverage
The Real Deal reported on CloudHQ $3 million community-benefits package tied to the Mount Prospect megaproject. · source - 2026-07-16permit
Mount Prospect hired outside firm HR Green at up to $22,500 to handle three CloudHQ permit reviews, citing roughly 3,700 sheets of construction drawings and 1,500+ pages of structural calculations. · source
Find the paper trail
Find the paper trail (1 filed · 12 places to look)
Permits already on file (1)
Filings we have a source for — the record, not a place to look for one.
- 2026-07-16
Mount Prospect hired outside firm HR Green at up to $22,500 to handle three CloudHQ permit reviews, citing roughly 3,700 sheets of construction drawings and 1,500+ pages of structural calculations. · source
State environmental permits
Backup generators, water withdrawal and stormwater are permitted by the state, usually earlier and in more detail than anything filed locally.
- Illinois EPA — Bureau of AirThe program page: which permits this state requires, and the office that issues them.
- Search Illinois EPA — Bureau of Air for this projectsearchThis state publishes no searchable permit database, so a written records request to the agency is the reliable route. Use this search only to find the right office.
County & town filings
The rezoning application, site plan, traffic and noise studies, staff report and every revision.
- Search Mount Prospect planning filingssearchPlanning departments post application files under many different names. Find the department, then ask the clerk for the application number — that number unlocks everything else.
- Search Mount Prospect property records / GISsearchThe parcel record names the buying LLC and the sale date, which is what ties an anonymous filing to an operator.
Utility & grid records
The electricity request is filed with the grid operator and the utility long before the town hears about it — and states the real load.
- PJM Interconnection (Mid-Atlantic, Ohio Valley) — interconnection queueRequested megawatts, queue position and target in-service date. The MW here is the real number; the one at the town meeting is often phase one.
- MISO (Midwest & Gulf) — interconnection queueRequested megawatts, queue position and target in-service date. The MW here is the real number; the one at the town meeting is often phase one.
- Illinois Commerce Commission — docket searchSpecial contracts, large-load tariffs and rate cases are docketed here. Testimony and exhibits are public, and are usually more candid than the press release.
- FERC eLibraryFederal filings: transmission agreements, interconnection service agreements, and co-location disputes.
- Search the serving utility for a will-serve lettersearchThe will-serve or load-service letter is the utility's own written commitment. Ask the utility and the PUC for it by name — it is frequently the first document to exist.
Federal databases
Works anywhere, and covers the operator's record at its other sites.
- EPA ECHO facility searchEvery federally-reported air, water and waste permit at a facility, plus its inspection and violation history. Search by address or draw a radius around the site.
- EPA EnvirofactsThe same underlying records, queryable by county — useful for 'what else is permitted near this site' rather than one facility.
- EPA Facility Registry ServiceResolves the shell LLC on a permit to the facility it belongs to. Worth a look when the filing name means nothing locally.
These are places to look, not evidence that anything has been filed. Links were checked on 2026-08-21; search links are queries, not records. What to ask for.
Around here
- Illinois briefing — rates, grid carbon, PUC contacts.
Other tracked projects in Illinois
- CyrusOne Aurora — Aurora
- Karis Critical Plum Farms Data Center — Hoffman Estates (Cook County) Withdrawn
Cite this page: GridWatch AI, “CloudHQ Mount Prospect”, aigridwatch.com/projects/cloudhq-mount-prospect-il, retrieved 2026-10-11.
As of August 2026 (2m ago) · changes weekly — re-check before citing
A working set of identified proposals a community can track, not a census — most of the country's activity is not in here yet. Pennsylvania is the exception: its rows are synced from PA DEP's own data-center permit tracker, so the state's coverage is close to complete and carries the permit trail with it. **Each row carries its own provenance.** Rows showing a verification date link to reporting or the governing body's own record and were read on that date; rows marked *unverified* have no source on record — a lead to check, not a fact to cite. **Stage is derived, not asserted.** *Hearing scheduled*, *Awaiting decision*, *Approved* and *Withdrawn* are computed from each row's milestone dates on every rebuild, so a hearing date that has passed stops reading 'scheduled'. Hearings get moved and projects re-file under new names — treat a scheduled date as the earliest to act by, and confirm with the clerk before relying on it. Leads are mined into data/project_candidates.json and promoted here only after a human reads a primary source.
Part of the data center project tracker — open data, CC BY 4.0 (JSON · CSV).