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Data center campus · 12901 W Olive Ave, El Mirage (Northern Pkwy / Dysart Rd area), Maricopa County, Arizona

Microsoft El Mirage campus (West US 3)

Operating as of June 15, 2021

Microsoft's El Mirage campus is half of its West US 3 Azure region. It started on about 150 acres, and Microsoft added about 283 acres in 2024. Also known as: PHX-80, PHX-81, PHX-82, PHX-83, LogistiCenter at Copperwing.

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Apache CountyCochise CountyCoconino CountyGila CountyGraham CountyGreenlee CountyLa Paz CountyMaricopa CountyMohave CountyNavajo CountyPima CountyPinal CountySanta Cruz CountyYavapai CountyYuma CountyMicrosoft El Mirage campus (West US 3) · Operating
PowerNot statedNot reported in the records found
Site433acres

Who is behind it

ProjectMicrosoft El Mirage campus (West US 3)Also: PHX-80, PHX-81, PHX-82, PHX-83, LogistiCenter at Copperwing
Developer and teamMicrosoft
End userMicrosoft

The record, newest first

  1. The El Mirage P&Z Commission voted 4-0 to approve a site plan amendment for a data center at 12901 W. Olive Ave. The applicant said Microsoft was handling the site's service needs and EPCOR had been told of added water demand. (City of El Mirage Planning and Zoning Commission, Nov. 12, 2024)

  2. Microsoft sought a site plan amendment to add PHX-83, a 245,500 sq ft building, on the original 150-acre parcel at 12901 W Olive Ave, with a council hearing set for Dec. 3. PHX-80 was operating and PHX-81/82 were under construction; power comes from an existing APS on-site substation. (DatacenterDynamics, undated)

  3. Microsoft paid $258 million in cash for about 283 acres near Northern Pkwy and Dysart Rd, south of its existing 150-acre site. In May 2024 El Mirage had approved a development agreement with seller Dermody Properties for three data center buildings totaling 750,000 sq ft on that land. (ABC15 / Phoenix Business Journal, June 5, 2024; Arizona Technology Council (republished from Phoenix Business Journal), June 6, 2024)

  4. Microsoft announced that its El Mirage and Goodyear data centers, together the West US 3 region, were in service. (KTAR News, June 15, 2021)

Conflicts and open questions

  • Acres = the original ~150 plus ~283 bought in 2024; our sum of the reported parcels.
  • The DCD PHX-83 piece shows no date; its Dec. 3 council date follows the Nov. 12, 2024 P&Z vote, so we date it Nov. 2024.
  • The draft P&Z minutes' motion wording refers to a 'retail commercial building' although the item was presented as a data center.

The full record

Status note
Microsoft switched on its West US 3 region (El Mirage and Goodyear) in June 2021 and has kept expanding the El Mirage site since then.
Evidence
Primary public records
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.