CyrusOne Mesa campus (Elliot & Ellsworth)
Mesa, Maricopa County, AZ
Plans have been filed for CyrusOne Mesa campus (Elliot & Ellsworth), a data center in Mesa, AZ. The project is sized at 198 MW. CyrusOne's first Mesa campus: up to five two-story buildings of ~286,530 sq ft each (~1.4M sq ft, ~198 MW reported) on 62 acres at Elliot and Ellsworth roads. Mesa P&Z recommended approval in June 2026 and the city council approved the campus plan in July 2026. Separate from CyrusOne's Chandler and Phoenix sites. (Source dated 2026-06-01.).
- 198 MWPlanned capacity
Project status
- Announced
- Permitting
- Under constructionNot yet
- OperationalNot yet
Recorded changes
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Community sentiment
Should this project be built?
What’s next
Election Day is in 10 days.
12:30 AM · Phoenix, AZ
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Latest news
Nothing written about this data center yet.
Stories about it, and about Maricopa County, AZ, land here.
Records and documentation
Arizona state legislation
- Council Vote — Denial of AI Data Center Special Use ApplicationChandler City Council denied a special-use application for an AI data center project in December 2025.Download
- ACC Docket E-01345A-25-0105 - APS 2025 General Rate Case (Data Center Rate Class)Filed June 2025, seeking ~14-16% base rate increase including a 45%+ rate increase specifically for "extra-large energy users" (data centers) and a proposed annual true-up mechanism largely tied to data-center-driven load growth.Download
- Pima County Memorandum of Agreement (Project Blue / Humphreys Peak Properties)Binding MOA between Pima County and Humphreys Peak Properties for the 'Project Blue' data center development.Download
- Ordinance No. 5033 (Zoning Code Ch. 35, Sec. 2214)One of the earliest data center zoning ordinances in the US, enacted by Chandler, AZ in December 2022.Download
- ACC Docket E-00000A-25-0069 - Inquiry into Data Center Rate ClassificationsOpened April 2025 -- commission-wide inquiry into rate classification and cost-allocation policy for data centers/large loads ("Growth Pays for Growth"). Workshop held April 2026.Download
- HB2949 - Energy costs; large data centersDescription comingDownload
- HB2452 - Comprehensive plans; data centers; nuclearDescription comingDownload
Site details
- Operator
- CyrusOne
- County
- Maricopa County, AZ
- Capacity
- 198 MW
- Address
- Mesa, AZ
- Stage
- Planned
Size: not on file
Map
Photos
RenderingRendering: CyrusOne via AZBEX
Aerial imageryImage: DCD / Google Maps
Google Street View · nearby land, not the exact site
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