I have an 8x10' metal shed for my coop and plan to get another on to keep the turkeys in. Mine is off the ground with a cinderblock stemwall and wood platform (with about 10 coats of paint and a tarp over that which can be taken out and sprayed down, making cleaning easier. I personally recommend using metal and plastic materials because they are not affected by the poop the way wood is and can be easier to sanitize. I built a fully enclosed run on the northside (with a door built in for human access and to open for the chickens to go out to the yard). There is a tarp over the top so the birds can be outside even in the rain. My partner cut a hole so they can access the run which has a metal door I can close at night (this is good for extra security and to block out the breeze in the weather. The doors on the front is facing the house and I have put hot wire around the top of the fence around the chicken yard. There are also jingle bells wired to the top of the fence around the yard which are to alert our two Pyres in case something tries to go under or over. Nothing but a human can access the coop or run since I buried the fence about a foot and have bricks around the perimeter. We have alot of trees and the coop, the run and half the yard is shaded all day.
I know this sounds extreme but I lost 25 chickens and 5 turkeys in one night to raccoons and really do not want to experience that kind of heartbreak again.
In the summer we take off a panel on the south side of the coop and put up a panel of chicken wire with a fan to keep the coop from getting two hot. Last week we added an awning over the southside to keep the sun from shining directly into the coop and plan to put a mister up later this week or next. The birds seem to enjoy this alot and misters are cheep, I mean cheap.
The inside of the coop, I have 5 gallon buckets screwed together for nesting boxes, 55 gallon barrels cut in half with a front on it for my turkey mamas and some plastic stacking shelves. Everything can be taken out cleaned and sterilzied quickly and easily. Lets face it chickens and turkeys are not the cleanest animals in the world.
Once I get a chance I will post some pics of our set up.Well sorry this turned into a novelette, just I am pretty proud of it. Most of it I have done on my own. I even painted it to look like a red barn with a green roof and floor. Yes I am a bit obsessive compulsive.