# Microsoft Hoffman Estates Data Center

PJM data center · https://askthegrid.com/assets/facilities/microsoft-hoffman-estates-data-center--grid-load-e07e237aae5ea1da

The Microsoft Hoffman Estates Data Center is an operating campus at 2045 Lakewood Boulevard in Hoffman Estates, Cook County, Illinois. An October 2026 Illinois EPA notice describes three data centers, CHI05, CHI06 and CHI07, with 55 emergency generators among the permitted equipment. Normal power is purchased from the grid, and ComEd is building a substation for the campus. No campus MW figure has been published, and the village describes a 93-acre campus.

## Identity and location

- Operating status: operating
- Asset scope: campus
- Location: 2045 Lakewood Boulevard, Hoffman Estates, Cook County, IL
- Operator: Microsoft (exact asset)
- Owner: Microsoft (exact asset)

## Power and grid context

- ISO/RTO: PJM
- Electric utility: Commonwealth Edison Co
- Substation: ComEd substation under construction for the Microsoft campus

## Sources

- [https://webapps.illinois.gov/EPA/WebSiteApi/api/PublicNotices/GetAirPermitDocument/10677](https://webapps.illinois.gov/EPA/WebSiteApi/api/PublicNotices/GetAirPermitDocument/10677)
- [www.dailyherald.com](https://www.dailyherald.com/20241110/news/suburban-skyview-comed-substation-under-construction-in-hoffman-estates/)
- [www.dailyherald.com](https://www.dailyherald.com/20260219/news/hoffman-estates-mayor-talks-of-data-centers-new-search-for-hardware-store-in-annual-address/)
- [https://epa.illinois.gov/content/dam/soi/en/web/epa/topics/environmental-justice/documents/ira/ira-analyses/23110003.pdf](https://epa.illinois.gov/content/dam/soi/en/web/epa/topics/environmental-justice/documents/ira/ira-analyses/23110003.pdf)
- [https://geocoding.geo.census.gov/geocoder/geographies/onelineaddress?address=2045+Lakewood+Boulevard%2C+Hoffman+Estates%2C+IL&benchmark=Public_AR_Current&vintage=Current_Current&format=json](https://geocoding.geo.census.gov/geocoder/geographies/onelineaddress?address=2045+Lakewood+Boulevard%2C+Hoffman+Estates%2C+IL&benchmark=Public_AR_Current&vintage=Current_Current&format=json)
- [www.dailyherald.com](https://www.dailyherald.com/20210518/business/microsoft-data-center-approved-in-hoffman-estates-but-power-supply-questions-remain/)
- [www.growhoffman.com](https://www.growhoffman.com/2025%20Annual%20Report.pdf?t=202602041113530)
- [ComEd TDC214 Hoffman Estates Site Expansion – Reyes Group](https://reyesgroup.com/projects/comed-tdc214-hoffman-estates-site-expansion/)
- [https://epa.illinois.gov/content/dam/soi/en/web/epa/topics/environmental-justice/documents/ira/ira-analyses/23110003-modelling-memo.pdf](https://epa.illinois.gov/content/dam/soi/en/web/epa/topics/environmental-justice/documents/ira/ira-analyses/23110003-modelling-memo.pdf)
- [https://epa.illinois.gov/content/dam/soi/en/web/epa/topics/environmental-justice/documents/ira/ira-analyses/23110003-ejttitlevi-review.pdf](https://epa.illinois.gov/content/dam/soi/en/web/epa/topics/environmental-justice/documents/ira/ira-analyses/23110003-ejttitlevi-review.pdf)
- [Object Properties List](https://plus-pubweb.aspgov.com/eGovPLUS/eGovPlusHFM/license/buslic_dtl.aspx?bus_id=18077)
- [https://services3.arcgis.com/OYP7N6mAJJCyH6hd/arcgis/rest/services/Electric_Retail_Service_Territories_HIFLD/FeatureServer/0/query?f=json&where=1%3D1&geometry=-88.138337908583%2C42.074254357205&geometryType=esriGeometryPoint&inSR=4326&spatialRel=esriSpatialRelIntersects&outFields=ID%2CNAME&returnGeometry=false](https://services3.arcgis.com/OYP7N6mAJJCyH6hd/arcgis/rest/services/Electric_Retail_Service_Territories_HIFLD/FeatureServer/0/query?f=json&where=1%3D1&geometry=-88.138337908583%2C42.074254357205&geometryType=esriGeometryPoint&inSR=4326&spatialRel=esriSpatialRelIntersects&outFields=ID%2CNAME&returnGeometry=false)

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Profile generated: 2026-11-02T19:59:44.270484Z
Source: Ask the Grid — https://askthegrid.com/