The front is 6x9 run area... I’m going to run 1x2 rafters from the center ridge pole to the top of the walls giving me a peaked roof which will be a tarp stapled down over it. The rear 6x3 area will be roosts over a raised hardware cloth floor on the large side, and nesting boxes and a door with a plywood floor landing area. It will be walled in with ventilation in the peaked area.
We get a lot of rain, but rarely get much below freezing here so the “coop” part is mostly for a secure sleeping/laying area. I plan on using it primarily to isolate a breeding group of about 13 birds at a time. It will be on wheels so I can move it over fresh grass regularly.
The biggest expense so far is the hardware cloth for the run, but I bet you could use cheaper chicken wire or reused fencing materials to cut costs, as the chickens will be locked safely in the sleeping box at night. New lumber cost me about $100 CAD. I got a full roll of 19 gauge, 4 foot high, 3/4” hardware cloth for $189 (but that was for 100 feet of it, I’ve used less than 40). I had a bunch of screws and staples on hand as well from previous projects. My siding material is likewise leftovers.
I plan on making the next one out of pallets, (my feed store keeps giving them to me) and more scavenged materials, but wanted to build the first one out of more regular materials to see how it works.