mmoffat

You could see light through he walls, but everything inside stayed dry.

just gravel and dirt. It was North facing, so nothing grew inside.

The doors were custom to allow me to walk in without ducking, so about 6'6" tall. The mower deck was 42" wide, had a couple inches extra space on each side, so about 48" wide, together, so right about 24" wide for each door.

About $200 on roofing materials. Corrugated tin isnt as cheap as i would've liked

You could put boards or staple screen material up in those gaps to keep critters out. I left them open for ventilation, especially once I moved the propane meat smoker in there! :)

The roof overlaps & overhangs enough that nothing gets rained on. The siding pieces are tight enough that nothing blows in. I would say that it's not water-proof, but it is water-tight. I built in some venting at the top so the whole thing can 'breathe'. That came in real handy when I put the smoker in there last Summer!https://youtu.be/AHgSgYMSkDw

In my area (Cole County, Missouri), no, as this is not viewed by the county as a permanent structure.

Awesome !