Lumber supply in St. Joseph, Michigan

Welcome to Southwestern Supply Corp., your trusted partner for high-quality building materials and construction supplies in St. Joseph, Michigan. Conveniently located at 4728 South Niles Road, we are proud to serve the local community and surrounding areas with exceptional products and unparalleled customer service. At Southwestern Supply Corp., we specialize in offering a comprehensive range of materials for both residential and commercial projects. Whether you're a contractor, builder, or DIY enthusiast, you'll find everything you need to complete your project with ease and confidence. Our extensive inventory includes lumber, roofing, siding, drywall, insulation, and much more, sourced from leading manufacturers to ensure durability and performance.