A free SpecWindow project list. Records checked Oct 26, 2026; they can change after that date.
California data center projects in government records, 2026
9 data center projects found in California government records dated April 26 to October 26, 2026: five pending Energy Commission backup generator exemption cases, two Energy Commission notices on CEQAnet recording Bay Area Air District generator permits, and city records in San Jose and El Segundo. 7 of the 9 records state a generator count, and two of those are issued air permits. Every project links to its government record.
CEQAnet's keyword search could not be used automatically, so air permit and CEQA notices were found only through the Energy Commission's project list and web searches. Santa Clara city records were checked only by title search, and Imperial County, Kern County planning, Sacramento and most Los Angeles area cities had no in window project record we could open. This is a sample, not a complete list.
Charcot Avenue Backup Generating Facility and data center (326 Charcot Avenue)
San Jose, Santa Clara County, California
- Record
- Small Power Plant Exemption application filed with the California Energy Commission, docket 26-SPPE-03, Oct 26, 2026. efiling.energy.ca.gov
- Applicant as named
- Prologis, L.P. (application filed by its representative DayZenLLC)
- Stage
- Permit pending. The application was docketed Oct 26, 2026, after the Energy Commission opened the docket on Oct 15, 2026. It asks for a decision by September 2027. The application says a City of San Jose Special Use Permit, an Administrative Use Permit for the generators, and Bay Area Air District generator permits are still needed.
- Equipment stated
- Proposed in the application: 44 diesel generators (42 Caterpillar 3516E units rated 3 MW and 2 Caterpillar 3512C units rated 1.5 MW) with Tier 4 controls, up to 99 MW of backup; a new project substation with two 100 MVA 115 kV to 34.5 kV transformers; and an expansion of PG&E's Trimble Substation.
Silver Creek Backup Generating Facility and data center (5977 Silver Creek Valley Road)
San Jose, Santa Clara County, California
- Record
- Small Power Plant Exemption application filed with the California Energy Commission, docket 26-SPPE-02, Sep 18, 2026. efiling.energy.ca.gov
- Applicant as named
- Prologis, L.P. (application filed by its representative DayZenLLC)
- Stage
- Permit pending. Energy Commission docket opened Sep 17, 2026 and the application was docketed Sep 18, 2026. The City of San Jose lists a related data center application, SP26-016, submitted Jul 13, 2026 and under environmental review (city data center page).
- Equipment stated
- Proposed in the application: 44 diesel generators (42 Caterpillar 3516E units rated 3 MW and 2 Caterpillar 3512C units rated 1.5 MW) with Tier 4 controls, up to 99 MW of backup; a new 100 MVA project substation with two 115 kV to 34.5 kV transformers; and a new PG&E Hellyer Switching Station at 455 Piercy Road.
Microsoft San Jose Data Center (1657 Alviso-Milpitas Road)
San Jose, Santa Clara County, California
- Record
- Notice of Determination filed on CEQAnet by the California Energy Commission, recording a Bay Area Air District Authority to Construct (Application 704043), received Aug 19, 2026. ceqanet.lci.ca.gov
- Applicant as named
- Microsoft Corporation
- Stage
- Permit issued. The notice says the Bay Area Air District issued an Authority to Construct for 84 natural gas backup generators, approved Aug 18, 2026. Earlier in the window the Air District approved one diesel generator and two diesel fire pumps on May 11, 2026 (CEQAnet notice), and Valley Water, a responsible agency, filed its own approval on Jul 14, 2026 (CEQAnet notice).
- Equipment stated
- Permitted: 84 natural gas backup engine generators (sources S-7 through S-90), each with a 3 way catalyst. The notice says 224 natural gas generators are planned and permits for 140 were issued earlier. Also permitted May 11, 2026: one diesel backup generator and two diesel fire pumps. The notice says maximum data center demand would not exceed 99 MW.
Vernon Backup Generating Facility for the Goodman Energy Park data center (3163 and 3049 East Vernon Avenue)
Vernon, Los Angeles County, California
- Record
- Notice of Preparation of a Draft Environmental Impact Report, California Energy Commission docket 25-SPPE-01, Aug 5, 2026. efiling.energy.ca.gov
- Applicant as named
- GIC Vernon LLC
- Stage
- Permit pending. The Energy Commission is preparing a Draft EIR; the scoping comment period ran Aug 5 to Sep 4, 2026. South Coast AQMD and Communities for a Better Environment with the Center for Biological Diversity filed comments on Sep 4, 2026, and staff issued Data Requests Set 2 on Sep 25, 2026 (docket log).
- Equipment stated
- Proposed, as described in the Energy Commission notice: 40 diesel generators (38 rated 3 MW for data center loads and 2 rated 1 MW for house loads), up to 99 MW of backup; an onsite project substation and a new Vernon Public Utilities Soto switching station.
NorthTown Backup Generating Facility and data center (southwest corner of West Trimble Road and Orchard Parkway)
San Jose, Santa Clara County, California
- Record
- Notice of Preparation of a Draft Environmental Impact Report, California Energy Commission docket 25-SPPE-02, Jul 21, 2026. efiling.energy.ca.gov
- Applicant as named
- GIC San Jose LLC
- Stage
- Permit pending. The Energy Commission is preparing a Draft EIR; the comment period on the notice ran Jul 21 to Aug 20, 2026. The applicant filed responses to Data Request Set 3 on Aug 31, 2026 (docket log).
- Equipment stated
- Proposed, as described in the Energy Commission notice: 42 Tier 4 diesel generators (40 rated 3 MW and 2 rated 1.75 MW), up to 97.3 MW of backup; a project substation and a PG&E switching station.
Eight Form data center and substation (750 North Nash Street)
El Segundo, Los Angeles County, California
- Record
- Planning Commission public hearing notice, Site Plan Review SPR 25-04 and Environmental Assessment EA-1400, for a hearing on Jul 9, 2026 (the notice does not show its issue date). elsegundo.gov
- Applicant as named
- Eight Form, c/o Andrew Messori
- Stage
- Withdrawal intended (reported, not from a city record). The developer said at the Jul 9, 2026 hearing that it would withdraw the application, reported by DatacenterDynamics. We did not find a city record of the withdrawal.
- Equipment stated
- Proposed in the application: a 66/12 kV electrical substation to serve the data center. The notice does not mention generators.
300 Holger Way data center (existing building conversion)
San Jose, Santa Clara County, California
- Record
- Special Use Permit SP25-029 approved and issued by the Director of Planning, Building and Code Enforcement, Jul 8, 2026. sanjoseca.gov Read through the City of San Jose's official Legistar meeting data feed (webapi.legistar.com/v1/sanjose, matter 16374).
- Applicant as named
- Holger Technology Partners LLC (Allison Koo)
- Stage
- Zoning approved. The permit allows a data center use inside an existing 97,800 sq ft building; the exemption describes it as a 20 MW data center use (statement of exemption). An appeal of the CEQA infill exemption was heard by the City Council on Oct 20, 2026, with staff recommending a resolution denying the appeal (council item 26-1082); no outcome was posted as of Oct 26, 2026.
- Equipment stated
- None proposed. The permit says it does not include approval of any standby or backup power generation, and the exemption says no emergency generators are proposed.
RB Inyokern Data Center (near US Highway 395 and State Route 178)
Inyokern, Kern County, California
- Record
- Energy Commission Data Requests Set 1 on the Small Power Plant Exemption application, docket 26-SPPE-01, Jun 11, 2026. efiling.energy.ca.gov
- Applicant as named
- R&L Capital, Inc.
- Stage
- Permit pending. The application is dated May 8, 2026. The applicant filed Data Response Set 1 on Jul 1, 2026 and staff issued Data Requests Set 2 on Sep 25, 2026. The docket holds many public comments for and against, including requests to deny the exemption (docket log).
- Equipment stated
- Proposed in the application, as described by Energy Commission staff: 40 diesel generator sets (Caterpillar 3516E) rated 3 MW each, up to 99 MW of backup; a customer owned 115/34.5 kV substation with two 60/80/100 MVA transformers (CEC project page).
Equinix Great Oaks South, Building SV18 (123, 127 and 131 Great Oaks Boulevard)
San Jose, Santa Clara County, California
- Record
- Notice of Determination filed on CEQAnet by the California Energy Commission, recording a Bay Area Air District Authority to Construct (Application 738296), received May 7, 2026. ceqanet.lci.ca.gov
- Applicant as named
- Equinix LLC (Energy Commission exemption held by SV1, LLC, an Equinix subsidiary, per the CEC project page)
- Stage
- Permit issued. The notice says the Air District issued an Authority to Construct for added generators at Building SV18, and lists Apr 28, 2026 as the approval date. The campus received its Energy Commission exemption in 2021.
- Equipment stated
- Permitted: six emergency backup diesel generators (sources S-23 through S-28) for Building SV18; one passage of the notice says seven. The notice says the full facility has 36 diesel generators rated 3.35 MW across Buildings SV12, SV18 and SV19, plus life safety generators (the CEC project page says 3.25 MW).
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