Don't laugh i sort of did that with the uber ugly turkey coop, all ugly, all the time. had salvaged greenhouse table tops that were five by nine. The spot was a good spot except for the slope. Fine ... Turkeys do not know anything about level and plumb. i'm all set. they were just rows of 2 x 4 and weld wire but hey, it was free. Tacked em up with 4x4s where they almost met. Wasn't kidding about ugly.
At the highest side, i tacked that one higher up than the others, at about 2.5 ft. now the highest point and side are up and everything runs off fairly evenly downhill. Rig ugly set of old barn true 2x4s for the slant roof and there. it's nine by nine by 7.5 at one end, five at the other, heavy slant. We get no snow. The violent slant won't hold water. The slope of the whole thing runs water away from both coops. Finished wiring in the base, add hardwire cloth to keep out coon hands and weasels. make a door. if there's a level or plumb line in the whole thing i'd die of laughter.
But i spent about 20 dollars on the whole thing. used salvaged wood for some roosts and branches for others, and cobbled together two shelf nest boxes in one corner.
i plan on getting some factory rubber belting, four feet, exceedingly ugly, to tack up high for wind protection. Stuffs heavy and ugly but... free. i'll work on pretty later when i place the permanent structure.
in the meantime i will have a place for birds who would sit on unlevel tree branches and call themselves happy. They can grow and begin to lay while i decide where i want a real coop.
And i could win the ugliest coop contest hands down once i get that danged siding on. Slanted isn't all that bad a thing.
oh and it's all anchored, well, to a wood lightpost like telephone posts, that's about four feet in the ground. it isn't going anywhere despite it's slightly odd demeanor.
in snow country it wouldn't work but for the two inches we get a year, it'll do.