About CMU Blocks

CMU Blocks is a family-owned concrete masonry unit manufacturer and construction supply company serving the Rio Grande Valley and broader South Texas region since 1985. We produce high-quality CMU blocks — including standard, solid, thermal, and our patented Ferroblock reinforcement system — at factory-direct prices, delivering directly to residential, commercial, and contractor jobsites across both the United States and Mexico.

Our platform is built for contractors, builders, masons, and do-it-yourself homeowners who need reliable access to commercial-grade concrete blocks and construction supplies without the markup of big-box retailers. Through our online estimator tool, customers can calculate exact block quantities, pallet counts, and freight costs in seconds, then request a professional quote or place an order directly from their phone. Our Supply Hub gives returning customers a dedicated portal to manage projects, track orders, view quotes, and coordinate deliveries — all from a single mobile-first dashboard.

We operate distribution yards in Alton, Donna, Rio Grande City, and Brownsville, enabling fast, efficient delivery throughout Hidalgo, Starr, and Cameron counties and beyond. Every block is manufactured to ASTM specifications, and our team brings decades of masonry experience to help customers choose the right materials for walls, fences, foundations, and specialty projects. Bilingual support in English and Spanish is available across every step of the ordering process.

CMU Blocks is built and operated by a dedicated team of masonry professionals, logistics specialists, and software engineers committed to modernizing the way construction materials are ordered and delivered in South Texas. Our mission is simple: factory-direct quality, transparent pricing, and dependable delivery — backed by three generations of family ownership and a genuine commitment to the communities we serve.