The 8x12 gable storage shed plan is a medium size lean to shed that's easy to build. save yourself thousands of dollars by building it yourself. the 8x12 gable storage shed plan is a medium size lean to shed that's easy to build. save yourself thousands of dollars by building it yourself. 1-801-471-6525. facebook; twitter; google;. Gable storage shed plans 12x20u inverter 10 x 10 shed plans and material list building.shed.with.pallets how to build storage in a basement how to build a shed cost if you are not constructing your shed on a concrete slab you will need to give some thought to some type of foundation to produce sure that the shed floor is raised up going.. This shed is built on a skid foundation, this makes it portable, in case it needs to be moved. 8x8 gable storage shed - these instructions will take you through the steps involved to build a basic 8'x8' gable style shed..