The one I built at my last house was 8x12 and I figure I spent about $1200 in materials. But it was a 1x4 floor, 16"-centered walls, rough-cut cedar siding, and cedar shake roof. The only plywood/pressboard on the whole thing were the little triangle braces for the door frames. I built it by myself in a week of evenings after work (probably 8 hours just in nailing on the roofing). Due to permitting issues, I had to make it 'mobile' and I also had to keep it under 120ft2, which was tight with the roof overhangs. For mobility, I built it so that a forklift could pick it up and it just sat in 9 of those concrete pier blocks with a 3" piece of PT 4x4 sticking up to support the floor frame.
At this house, I'm going to pour a little slab on the side of the house and build a cheap half shed to store the mower and stuff. Since it's out of sight, I'm not going to get too excited about it.
At this house, I'm going to pour a little slab on the side of the house and build a cheap half shed to store the mower and stuff. Since it's out of sight, I'm not going to get too excited about it.