I built this 12x16 shed that will hopefully hold a riding mower someday.
Here is a material list that includes most of the lumber used for the shed. It doesn't include any fasteners or hardware.
3 - 4x4x16' - base
2 - 2x6x8' - blocking
12 - 2x6x12' - floor joists
2 - 2x6x16' - floor joists
92 - 2x4x8' - walls, rafters, shelves, door, extra
12 - 2x4x12' - walls
6 - 2x4x16' - walls
6 - 4x8x3/4" tongue and groove OSB - floor
13 - 4x8x7/16" OSB - roof sheathing, door
16 - 4x8 T1-11 - siding
3 - 3/8"x10' plywood edge metal flashing - siding
24 - 1x4x10' primed whitewood - trim
4 - 1x6x12" primed whitewood - trim
2 - 1x6x16' primed whitewood - trim
1 roll 15# felt - roof
8 - 1 3/8"x10" white galvanized drip cap - roof
1 roll starter shingle - roof
10 - architectural shingle - roof