Dallas-based CyrusOne has filed plans with the Texas Department of Licensing and Regulation to construct a USD 500 million data center in Castroville, a small town roughly 30 minutes west of downtown San Antonio along U.S. Highway 90.

The project adds to a growing concentration of technology infrastructure in Medina County and marks the company's first facility in the Hill Country community.

Project Details and Timeline

The development, identified in the TDLR filing as SAT14A, encompasses 460,000 square feet and is described as a one-story building situated along Highway 90 in Castroville.

Plans were registered with the state on July 16, 2026, though according to the filing, construction appears to have begun as early as January 12, 2026.

The filing lists a construction end date of June 1, 2027, though all details contained in TDLR filings are subject to change at any time.

CyrusOne is a global data center developer headquartered in Dallas that designs, builds, and operates data centers worldwide.

The company currently operates five data centers in San Antonio, and the Castroville project would represent its first presence in the broader Hill Country corridor to the west of that city. A CyrusOne representative was not immediately available for comment.

Part of a Broader Medina County Development Wave

The CyrusOne filing arrives amid what observers have described as a surge of technology investment in Medina County.

Among the other projects taking shape in the area is a 265-acre technology park and Microsoft's SAT 89 campus, both of which represent significant additions to the region's digital infrastructure.

The accumulation of projects has positioned Castroville and surrounding Texas communities at what industry observers have called the forefront of a rapidly expanding data center market.

One industry report cited in connection with the regional buildout claims the Texas data center market is on track to become the largest in the world by 2030.

That projection has helped draw investment not only to established hubs like San Antonio but also to smaller, adjacent communities that offer available land and proximity to existing utility and transportation infrastructure.

CyrusOne's existing five San Antonio facilities make it one of the more established data center operators in the metropolitan region, and the Castroville project extends that footprint into a county that has seen increasing demand for large-scale technology campuses.

The Highway 90 corridor, which connects San Antonio to the smaller communities to its west, has emerged as a focal point for that expansion.

Community Concerns Accompany the Investment

The rapid pace of data center development in Medina County has not gone uncontested by local residents.

Community members have organized online to voice concerns about the proliferation of technology facilities in the area.

A Facebook group originally called Medina Co. vs. Data Centers has attracted residents opposed to or seeking information about the wave of projects, and as of the time of reporting, the group was operating under the updated name Medina County Talks Data Centers - Info & Discussion.

The concerns reflect a tension that has emerged in communities across Texas and beyond as data center developers seek out land in smaller towns that may offer cost or logistical advantages compared to larger urban markets.

Residents in such communities have raised questions about the impacts of large industrial facilities on local character, resources, and infrastructure, even as local governments and economic development officials often point to the investment and tax revenue such projects can generate.

Castroville itself is a small town, and the arrival of a project at the scale of CyrusOne's proposed SAT14A facility represents a substantial development for a community of its size.

The 460,000-square-foot building, with a total project value of USD 500 million, would be a significant physical and economic presence along the U.S. 90 corridor.

CyrusOne's Regional and Global Presence

CyrusOne's San Antonio operations already make it a significant player in the South Texas technology infrastructure market.

The company's five existing facilities in the city represent years of accumulated investment in a region that has attracted data center developers due to factors including available land, relatively affordable power, and geographic positioning.

The Castroville project, situated just outside the city's western edge, follows the pattern of data center expansion pushing into surrounding counties as urban land becomes more constrained or expensive.

The company's global footprint spans multiple countries, with CyrusOne describing itself as a designer, builder, and operator of what it characterizes as industry-leading facilities.

The SAT14A designation for the Castroville project suggests it fits within a broader naming convention tied to the company's San Antonio market presence, even as it represents a geographic expansion of that presence into Medina County.

The TDLR filing that disclosed the project was submitted on July 16, 2026, making the Castroville development one of the more recent additions to the public record of large-scale construction activity in the region.

With a listed completion date in mid-2027, the facility would join a Medina County data center landscape that is continuing to take shape at a significant pace.