This is a source-attributed discovery row. It can help you find a place and its citations; it is not a DataCenterData finding that the facility is distinct or currently operating.
Reported geography
Source-reported location for Microsoft Alviso Data Center Campus.
Approximate source coordinates; this is not a parcel claim. Nearby source points are combined into one accessible target that opens this exact map scope. View these exact rows on the interactive map →
Source row snapshot
- Operator as published
- Microsoft
- Address and locality
- 1657 Alviso-Milpitas Road · San Jose (Alviso) · Santa Clara County · California
- Official metro area
- San Jose-Sunnyvale-Santa Clara, CA
- Source-reported status
- under construction
- Provider facility type
- data center
- Reported capacity
- Planned: 48 MW (source-reported; boundary not independently verified; MW measure not stated by provider)
- Source freshness
- 29 September 2026
- Location precision
- approximate
- Compute Atlas confidence label
- confirmed (provider's classification; not a DataCenterData check)
- Stable directory ID
dcd-dir-000961
Reported details
Source-reported by Compute Atlas; not independently verified by DataCenterData. Provider wording is kept; long provider notes are shortened and marked …; unknown is not zero; none of these values is totaled, ranked or compared.
- Electric utility
- Pacific Gas and Electric Company
- Power source
- Grid
- Cooling
- Not established
- Land area
- 65 acres (source-reported; parcel boundary not established)
- Announced
- 10 June 2026
Provider notes
Energy. CEC Small Power Plant Exemption 19-SPPE-04 (exempted 2022-07-14) covers backup generation for this site: 224 renewable-natural-gas generators rated 0.45 MW each plus two diesel administrative generators of 1.25 MW and 0.5 MW, against a stated maximum electrical load of 99 MW and an estimated operational load of 77 MW.
These reviews flag conflicting scope, inconsistent source text or support that has not been established. A withheld value may appear in the explanation, but is not displayed as an established field. The upstream row remains attributed under Sources.
- Provider water note: Previously held pending provider-field review. The concern has not been resolved by an independent source review for this captured edition; the field remains withheld.
What the source record says
Microsoft's first self-owned/operated data center in San Jose. Groundbreaking June 10, 2026, target completion 2028. 64-acre site (1657 Alviso-Milpitas Rd), two-building campus. Distinct from the already-tracked Prologis San Jose records.
Any MW value is reproduced as source-reported context. Its measurement boundary is not established consistently enough for comparison. Unknown is not zero.
Status history supplied by the source
- 2026-06-10 · source-reported under construction
Sources and attribution
These sources are listed for the whole row. Unless a figure links to its own source, the provider does not mark which one gave it, so a figure may not appear in every source.
- Microsoft breaks ground on Alviso data center campus in San Jose, California · Data Center Dynamics
- Microsoft breaks ground on new data center in San Jose · NBC Bay Area
- Microsoft breaks ground on data center in Alviso · SV Daily
- Connect CRE — Microsoft Breaks Ground on Long-Planned North San Jose Data Center Site
- HITT Contracting breaks ground on Microsoft Alviso datacenter · HITT Contracting
- San Jose Data Center (19-SPPE-04), applicant Microsoft Corporation, 1657 Alviso-Milpitas Road · California Energy Commission
- CPUC Resolution E-5439: PG&E agreements to energize Microsoft's new 90 MW data center (SJC02) at 1657 Alviso-Milpitas Road, San Jose · California Public Utilities Commission
- City of San José — Data Center and other Large Energy-Use Projects (application list updated 2026-07-13; Wayback capture 2026-08-13) · City of San José Planning Division
- 'Full-on Backlash' Against Data Centers Occurring as San José Courts Them · KQED
Adapted from Compute Atlas by Edward Kubiak, edition 1.34.1, under CC BY 4.0. Upstream ID microsoft-alviso-san-jose-ca. Filtered to data-center records in the 50 U.S. states; selected fields normalized for search and display; DataCenterData directory IDs added. Some locations in this layer are reported by the provider as derived from OpenStreetMap (© OpenStreetMap contributors, ODbL, https://www.openstreetmap.org/copyright) and Epoch AI (CC BY 4.0).
Compute Atlas 1.34.1 with retained prior rows and publication holds. This is a DataCenterData composite, not an unmodified publisher edition. This row uses the captured source from 1.34.1, source as of 2026-10-14T20:40:52.293Z.
State or local registry record
What a state or local government record says at this same street address. The record is cited, not republished. It does not establish that a data center is operating, its capacity, or its owner or operator unless the record says that role. It is not added to the counts on this page.
Same street address. The government record cites the same street as this record.
San Jose Data Center
- Publishing agency
- California Energy Commission
- Record type
- energy siting case
- Record identifiers
- 19-SPPE-04
- Named in the record
- Microsoft Corporation
What this record does not establish
- That a permit, certification, tax status, or application means an operating data center.
- Current IT capacity, utility load, or generation capacity.
- Who operates the site. A company named in the record is not the operator unless the record says so.
- Cooling redundancy. Mentioned equipment is not a design rating.
- Whether the record covers one building, a campus, or a suite, beyond the unit label the record itself uses.
That does not mean the row is wrong, and it does not mean no reviewed record exists for the same place. A link is added only when an identifier or source establishes the match.
Recorded information
What this page records, grouped by topic, with the source's units and qualifications. Company-reported values stay labeled as company-reported. Related listings are shown separately.
Licensed directory listing dcd-dir-000961
Licensed directory row.
Provider notes and the source narrative are printed on this page and are not repeated here.
Identity and relationships
- Provider facility type: data center
Provider facility type.
Location and precision
- 1657 Alviso-Milpitas Road, San Jose (Alviso), CA · Santa Clara (Approximate location)
Roles
- Operator: Microsoft
Operator label as published by the provider; no parent company is inferred.
Lifecycle
- Source-stated status: source-reported under construction
Provider status label; not a DataCenterData finding that the facility is operating.
- Announced: 10 June 2026
Provider-reported announcement date.
- Status history: 2026-06-10 · source-reported under construction
Status history supplied by the source.
Area, acreage and buildings
- Land area: 65 acres (source-reported; parcel boundary not established)
Power capacity
- Reported capacity: Planned: 48 MW (source-reported; boundary not independently verified; MW measure not stated by provider)
Reproduced as the page prints it; not ranked or totaled; unknown is not zero.
- Electric utility: Pacific Gas and Electric Company
Utility as named by the provider.
- Power source: Grid
Provider label.
Cooling, water, PUE and WUE
- Cooling: Not established
Provider label: unknown.
Sources, dates, limitations and corrections
- Provider update date: 2026-09-29
Provider update date is not a DataCenterData verification date.
Not yet recorded here: Connectivity · Services · Certifications and design ratings · Rack density · Availability · Specification links and contact · Permits, incentives, jobs and proceedings.
Licensed values: adapted from Compute Atlas by Edward Kubiak under CC BY 4.0. Source-reported and not independently verified.
Update this profile with a public source. The request includes topics needing more information; this does not mean the facility lacks them. Corrections and additions are reviewed before publication.