We just finished building our coop (we think!). We did from scratch for 6 chickens, but allowing for more, should we decide later. It was a challenge, as we ("I") continually changed design ideas during the process, incorporating more great ideas learned from fellow forum folks (!), much to DH's dismay with one step forward, two steps back! It would have been SO much easier and WAY less expensive to get pre-made, or convert a pre-fab shed, than deal with the mini arguments in the how's and why's and stopping to run to big box stores because we didn't account for certain hardware/additional wood/items not figured on (cha-ching!)..more or less flying by the seat of our pants, even with a drawn out, usable, albeit unprofessional floor plan.
Ours cost way more than $399 to build (shed style 7'x8'), but is also customized to what we desired, which always costs. It was our creation..from inception to "birthing" it; a labor of love, I guess, so, hard to put a real price on the pride we feel in the making of it. BUT..It all comes down to what you can afford, carpentry skills, the man hours you can invest and what you'll ultimately be happiest with in the long run. Thankfully no one dictates what our coops should look like, so go with what feels best for you, and in the interest of your chicks!! Good luck
