Microsoft is developing a two-building data center campus on a 64.5-acre site in northern San Jose. The company bought the land in 2017 for about $73.2 million; site work began in fall 2025, and a June 2026 report said the project had broken ground.
What Microsoft is building in San Jose
The project is near Alviso-Milpitas Road in northern San Jose. City project records describe two data-center buildings totaling approximately 396,914 square feet, with a maximum electrical load of 99 megawatts (MW).
The 99 MW figure is the campus’s stated maximum electrical load in the city record, not a published estimate of the facility’s actual continuous consumption. The record does not establish how much power the buildings will use at a given time.
Project figures at a glance
| Item | Reported figure | Source and qualification |
|---|---|---|
| Land purchase | About $73.2 million | Microsoft’s 2017 purchase, as reported by the project coverage. |
| Project site | 64.5 acres | City of San Jose project record; coverage also rounds the site to about 65 acres. |
| Building area | Approximately 396,914 square feet | City of San Jose project record for the two-building project. |
| Maximum electrical load | 99 MW | City of San Jose project record. |
When construction started
Microsoft says work began in fall 2025 with earthmoving and soil remediation. A June 2026 report described the project as having broken ground. Those accounts indicate site preparation and a later construction milestone; neither establishes a completed facility or an opening date.
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What the data center may be used for
The campus will expand Microsoft’s self-owned cloud infrastructure in Silicon Valley and may support AI workloads. Microsoft describes AI data centers generally as facilities for training and inference, but it has not published a final workload mix for this San Jose campus. It would be premature to say that the site is dedicated to AI or to a particular customer or service.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Local effects and what remains unknown
Project coverage has reported that people near the site were told to vacate nearby land. City project records also include planned road and utility improvements. The available information does not specify the full scope, schedule, or final effects of those changes.
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- Keep critical network equipment secure: glass door and side panels are lockable to prevent unauthorized access; Front door can be installed on either side of the front of the cabinet to satisfy your door swing orientation preference
- Easy equipment configuration: Fully adjustable mounting rails and numbered U positions, with square holes for easy equipment mounting with top and bottom punchout panels for easy cable access
- Durability: Made of high quality cold rolled steel holds up to 110lb (50kg) (Easy Assembly Required)
- PCI & HIPPA and EIA/ECA-310-E compliant
No authoritative final construction cost or confirmed opening date has been published in the available project information. The land purchase price is not the cost of constructing or operating the campus.
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