Design

• Decide on a shed design and check local building codes before you begin the project. Plans for basic shed designs, such a saltbox or lean-to, are readily available from most major home improvement stores. You can also find custom plans in a variety of books dedicated to the subject, some of which may be available in your library. Determine the amount of space you have available so you can make necessary adjustments to your plans and obtain the right amount of material.
  
  

Foundation

• You have two options for foundation construction. The first is to pour a concrete slab for a shed you intend to be permanently placed. Use frame anchor bolts around the perimeter. The more common foundation style employs concrete piers. Pour a concrete pier, topped with a pre-cast pier block and post anchor, for each corner and then enough along the sides to support the structure. The total number will vary depending on the size and shape of the shed.
  
  

Floor

• For a concrete slab, you can leave the floor as is, or you can use a floor covering or finish when the structure is complete. The floor for a shed on piers is a little more complicated. Start with a frame of 2x8 joists mounted onto 4x6 pressure-treated skids. The skids will mount onto the piers. Once in place, cover the floor with plywood sheathing.
  
  

Walls

• Start with 2x4 framing for most shed walls, although some require post and mid-rail construction. This depends mainly on the type of siding you are using. If you plan to move the shed frequently, use a lightweight siding. Frame in windows and doors as you build the walls. Many people leave the interior walls of their sheds unfinished, but you can add drywall or other materials when the major construction is complete.
  
  

Roof

• You need only use a ridge board with rafters and collar ties for small sheds, but roof trusses work better for larger construction. You can buy trusses pre-manufactured for your specific project. Use plywood sheathing for roof coverings like asphalt shingles, but for a more rustic look, use strip sheathing and wood shakes. For sheds with a low clearance, a gambrel roof will give you considerably more headroom.