This is our Recycled Coop! The siding and most of the wood was salvaged from dumpsters where a new subdivision was being built. We did have to buy two of the 2x4's. The door was an old interior door whose bottom had been destroyed by dogs, our neighbors were tossing it and I loved the design on the top. The window was free off craigslist. Paint was from the household hazardous waste place. They give it away free.
The flooring was an excess roll from the old floor at my parents house. We caulked the edges with leftover caulk from a house project.
The roosting bar was a branch we cut off a tree in our yard. The pop door was scrap wood, worked with an old telephone cord for rope and a pulley. A bent wire hooked to the fence to keep it up. The deep litter bedding was leaf litter (free from yards), shredded paper (from a local business), and straw (purchased). We also used cypress needles and pine needles as available from public parks for the coop (cypress) and run (pine needles). Cypress was by far my favorite and smelled like HEAVEN.
Nesting boxes used plastic bins for easy cleaning, but eventually we took them out, and it was just one large box, which the hens actually loved. Lid was made with scrap plywood we had laying around.
Feeder was made with a frosting bucket from the local bakery and a PVC section left in our garage by the previous owners (lucky!)
Waterer was made out of a kitty litter bottle and nipples I bought online. I later switched it to food grade pastics.
Free tire we painted and filled with dirt & wood ash for a dust bathing area. Our hens liked to stand on it, but didn't care to bathe in it.
Anyway, that's our coop and I loved it!