Buying an outdoor storage building with a loft greatly increases storage capability, allowing you to store rarely used supplies overhead. For the exterior, build your own lean-to and attach it to the outdoor storage building to form a sheltered area for firewood.
Will Your Outdoor Storage Building Be Big Enough? - Make sure the entry to the unit is wide enough to accommodate your largest piece of equipment, such as a gas snowblower, with room to spare. Many outdoor storage buildings that are at least 8 feet x 10 feet come with double doors, which usually eliminates this concern.