STACK Infrastructure SVY03A Data Center Campus

STACK Infrastructure's SVY03A campus at 26203 Production Avenue, in the Eden Landing industrial area of west Hayward, is the largest data center the city has approved. The roughly 300,000-square-foot project pairs a three-story data center building with a one-story building, an on-site substation, and a dedicated PG&E switching station on a site bounded by Eden Landing Road and Production Avenue. Its backup power plant cleared California's Small Power Plant Exemption process (California Energy Commission docket 23-SPPE-01), while the buildings themselves were approved without a Hayward City Council vote: the city classifies data centers as an 'office use,' so staff and the Planning Commission handled the entitlement, and the Commission only weighed in because STACK asked to raise the building height to 108 feet. The Commission approved that variance unanimously in May 2025, together with a public benefits package. The campus draws scrutiny on two fronts. Its backup fleet is unusually large for a single site: 28 emergency diesel generators rated up to 76.6 MW in total (26 units at 2.75 MW each, plus one 1 MW and one 1.6 MW unit), arranged in two generator yards. And its grid demand is heavy: a Hayward council member estimated the campus would draw electricity equal to about one-fifth of all the homes in the city, with STACK's clean-energy commitment leaning on purchased renewable credits rather than directly procured renewable power. In January 2026 the City Council publicly questioned how a project of this size moved through entitlement without coming before it.