Builders FirstSource is the nation's largest building materials supplier. Our Oklahoma City OK Lumber Yard - South proudly serves builders, contractors & remodelers in Oklahoma City and surrounding Oklahoma Area with their building supply & construction needs. This facility offers the following building supplies & services: Lumber and Building Materials, Trusses, Wall Panels and Components, Doors & Millwork, Windows, Design Center & Showroom, Business Center, Customer Pick Up | Will Call, READY-FRAME®, Mill Shop. Get ahead of the cooler weather - get fast, reliable service to stay on schedule. Visit us today to discover why we are known as builders' first choice!