Microsoft data center campus SAT80-SAT82 (FM 471 and Potranco Road, near Castroville)
Also called: SAT80, SAT81, SAT82
Microsoft is building a large data center campus on former farmland at FM 471 and Potranco Road in eastern Medina County. Two buildings (SAT80 and SAT81) came first; SAT82 (about $482 million) and another $400 million building at 3580 FM 471 North are next. Medina County gave SAT82 a 15-year, 80% property tax break.
Where things stand: SAT80/81 built since 2022-2024; SAT82 and a $400 million add-on are being built, due 2028.
🕒 Latest update (Dec 2025): Microsoft filed plans for a $400 million, 195,670-square-foot building at 3580 FM 471 North, due July 2028.
What we know
- 📍 WhereFM 471 at Potranco Road (FM 1957), east of Castroville, Unincorporated Medina County, Medina County
- 🏢 CompanyMicrosoft
- 👤 Built forMicrosoft
- 🌳 Size206 acres
- 💵 Cost$1.1 billion
- 💸 Tax breaksMedina County approved a 15-year, 80% property tax break for SAT82 (county judge).
❓ Still unanswered
Nobody has answered these in public yet. Can you help find out?
- How much water will the campus use, and from which supplier? 🙋 I'll find out
- How many diesel backup generators are on site? 🙋 I'll find out
- How much power will the campus draw, and will new power lines be built? 🙋 I'll find out
What happened so far
- July 2023Microsoft announced SAT80 and SAT81, costing about $230 million.
- July 2024Microsoft filed state plans for SAT82, a $482.6 million, 244,675-square-foot building.
- Dec 2025Microsoft filed plans for a $400 million, 195,670-square-foot building at 3580 FM 471 North, due July 2028.
Drag the slider to compare the land before and now.
Where this comes from
- Microsoft plans $482m data center in San Antonio, Texas · DatacenterDynamics · July 30, 2024
- Data centers replacing farmland, straining resources and nerves · San Antonio Report · Aug 25, 2024
- Microsoft Drops $400 Million Data Fortress on Castroville's Edge · Hoodline · Dec 25, 2025
- Texas data centers map and list · Cleanview (tracker) · Oct 2026
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