20x40 Metal Building Cost: What You’ll Really Pay

A 20x40 metal building gives you 800 square feet of enclosed space. It gives you the main enclosed garage space plus an attached lean-to for extra covered outdoor use. That’s a strong size for customers who need more than a basic garage but don’t want to jump into a large commercial building. It can work well for vehicle storage, tools, lawn equipment, ATVs, motorcycles, a workshop setup, or general property storage. Our 20'x40' Metal Garage With Lean-to starts at $15,195 . This is the Boss Buildings price for the metal building package, with delivery and installation included for the building itself. Concrete is not included in this shell price. 20x40 metal building cost - complete installation with concrete slab: Using the Boss Buildings starting price of $15,195 plus an estimated concrete slab cost of $4,800 to $9,600 , a 20x40 metal building with a concrete slab may cost around $19,995 to $24,795 . The average planning estimate is $22,395 . The concrete number is only a planning estimate based on $6 to $12 per square foot. Concrete work should be priced separately by a local concrete contractor based on your site, slab thickness, reinforcement, access, and local requirements. Quick Cost Breakdown for a 20x40 Metal Building Item Estimated Cost 20x40 metal building shell from Boss Buildings Starting at $15,195 Delivery and installation for the metal building Included Estimated concrete slab, 800 sq. ft. at $6-$12 per sq. ft. $4,800 - $9,600 Average estimated concrete slab cost $7,200 Estimated building + concrete slab total $19,995 - $24,795 Average estimated building + concrete slab total $22,395 These numbers are meant to help you plan your budget. Your final quote can change based on location, roof style, height, doors, windows, certification needs, site conditions, concrete requirements, and any custom options you choose. How the Concrete Slab Cost Is Calculated A 20x40 metal building needs an 800-square-foot concrete slab for the main building footprint. Using a slab estimate of $6 to $12 per square foot, the concrete cost works out like this: Low estimate: 800 sq. ft. x $6 = $4,800 High estimate: 800 sq. ft. x $12 = $9,600 Average estimate: 800 sq. ft. x $9 = $7,200 As such, the slab alone may average around $7,200 before any special site work or upgraded concrete requirements. Your concrete cost may increase if your property needs grading, gravel base, drainage correction, tree removal, thickened edges, wire mesh, rebar, or a thicker slab for heavier vehicles and equipment. What Does the 20x40 Metal Building Price Include? Our starting price for this building is $15,195 . The base price of $15,195 gives you more than enclosed storage. It offers a lean-to which adds open-air covered space beside the garage that’s great for parking, equipment staging, outdoor work, quick-access storage, loading, unloading, or keeping frequently used items covered but easy to reach. Delivery and installation are included for the metal building, which makes