WE ARE OPEN BY APPOINTMENT ONLY ON SATURDAY Builders FirstSource is the nation's largest building materials supplier. Our Clearwater FL Lumber Yard proudly serves builders, contractors & remodelers in Clearwater and surrounding West FL Area with their building supply & construction needs. This facility offers the following building supplies & services: Lumber and Building Materials, Doors & Millwork, Design Center & Showroom, Business Center, Pro Retail Store, Customer Pick Up | Will Call, Call for an Appointment, Mill Shop, Install Services. Visit us today to discover why we are known as builders' first choice!