Concrete blocks are a great way to create a level base for your shed. they can be doubled up to give a wide base, or stacked to build piers for higher clearance or uneven slopes. concrete blocks are ideal for flat or on-grade foundation support.. How i built my concrete block shed in my back garden.. Build shed with concrete block home depot storage sheds wood free 10 by 10 shed plans build shed with concrete block plans for sheds and outdoor buildings 12 by 20 shed simple shades wallpaper how to shed inches off belly