Welcome to Highline Building Supplies, your trusted partner for top-quality building materials at unbeatable prices in Garland, TX We pride ourselves on offering a wide selection of premium products like Doors, Windows, Vinyl & ENG Wood Flooring, Carpets, Baseboard, Trims and more.. All sourced from the best in the industry. At Highline, it’s more than just providing materials – it’s about building something great together, Let’s create spaces that inspire.