SDC Austin Building B — Round Rock, Texas

TYPE3’s map data lists SDC Austin - Building B in Round Rock under Sabey Data Center Properties LLC, with `Announced` status and 0 MW. Sabey’s July 2025 announcement says construction began on a three-story Building B designed to deliver 54 MW of power capacity, with the first 18 MW expected to be ready for service in Q3 2027. TDLR’s TABS2025004394 record identifies the project at 1300 Louis Henna Boulevard and describes a privately funded, approximately 400,000-square-foot data-center core and shell with an estimated completion date of September 2026.

Sabey’s current Austin page describes the broader Round Rock campus as 603,300 square feet with up to 84 MW of critical IT load. That is a parent-campus figure, not a measured Building B load, and it should not be added to the building-specific 54 MW design number. Likewise, a construction completion date is not proof that customer IT equipment is energized or that inventory is available for lease.

SDC Austin Building B’s published description distinguishes its core-and-shell work, planned total capacity, initial ready-for-service tranche, critical IT load, and commercial availability. Its commissioning milestone, energized IT load, tenant allocation, and orderable capacity still require confirmation before TYPE3’s map data baseline changes. Building B links to the SDC Austin parent as a child without duplicating parent totals.