Hills Flat Lumber Co. offers a full line of hardware supplies, building materials, Trex, Evergrain TimberTech, and other composite decking, Redwood & Ironwoods decking, full service custom door shop, windows, millwork, siding, plumbing, electrical, paint, rentals, nursery, cabinets and hard surface flooring. Hills Flat Lumber Co. is open 7 days a week and offers delivery service 7 days a week, 360 days a year. Hills Flat Lumber Co. now offers online shopping with access to 70,000 items at your finger tips.