[mongocanfly]

when I built mine I started to do a 40x60..i downgraded to 35x50...wish I had done the 40x60 or bigger now..already added a 24x40 side shed on the back and built a 25x50 pole barn...never enough it seems..
I would have to rethink the dirt over the top of the building...the soil is gonna be extremely heavy...and your gonna have to support it twice..once at ground level and again on the roof...add a heavy rain and that weight will multiply quickly... and as for a garden on top youd have to have fairly deep dirt to keep it from burning up your plants...my septic tank has 18" of dirt over it and the grass on top will die during the summer months..doing it into the side of the hill should work good though...I just wouldn't make the roof support that much load....I know npled has his in the side of a hill
if I ever have a do-over I'm gonna do at least a 40x80