Current metal building kit prices for popular sizes are $24,000 for a 30x40, $43,200 for a 40x60, and $75,000 for a 50x100, or $15 to $20 per square foot. On average, installed (turnkey) steel buildings cost $24 to $43 per sq., covering the kit, concrete slab . D Outdoor Metal Shed Storage with Updated Frame Structure and Lockable Doors, White (140 Sq. Ft) Get free shipping on qualified Metal Sheds products or Buy Online Pick Up in Store today in the Storage & Organization Department. Metal Outdoor Storage Sheds: Steel buildings give you lots of storage at a low price! Choose from our full line of metal storage shed kits and steel utility buildings from top brands Absco, Arrow, Biohort, DuraMax, Globel and Versatube. Our metal line of outdoor buildings come in galvanized steel. Design the perfect metal shed at factory-direct prices using our 3D shed design tool. You can protect your car or equipment from environmental elements like sun, water, and dirt that can degrade your valuables. The initial prices of the shed are $1095 and may vary. Why settle for a generic shed when you can own a solar-powered powerhouse? At SteelPRO PEB, we've helped thousands of DIYers transform their backyards with steel sheds that are built fast, built to last, and ready to harness the sun. No engineering degree required. From simple, open-sided structures with regular roofs to fully enclosed steel.