I have just started building chicken coops for a month now and loving it. This 3ftx4ft Winchester coop is amazing. it holds up to 4-7 chickens, but many of my customers say it can hold 8.
It comes with a clean out drawer, A man door on the side, 4 cute hand made windows, 4 egg boxes, 4 perches inside, 12x8 sliding chicken door, and a 3x5 chicken run.
My customers have been ordering this design the most due to how it looks more like a house instead of a coop. The roof was the most complex part using 2x4 trusses and 5/8 inch sheathing, but the rest of the framing was not all that hard using 2x2 studs.
The floor rafters is treated with 2x2's with 5/8inch osb sheathing on top.
This coop is extremely easy to build on site. I pre build it in my shop and it comes in sections so it is already painted. All what is required s screws to put the whole thing together.