The original Wood KD (knock down) coop is a proven design that is modular, intended to be built in 13 pieces (6 wall sections, 4 roof, 3 floor) and assembled/dis-assembled on-site.
It does not use conventional stick framing (although a number of folks on this site have constructed the design in that manner). The original design is very simple to build and very cost effective. It can be scaled from 6' by 10' to 10' by 16' thereby accommodating 15 to 40 birds.
Moreover it is a "fresh air" coop that is proven to be a healthy environment even in very cold locations. I am going into my 4th winter and can attest to it's effectiveness.
Prince Woods authored a book that explains the fresh air philosophy and contains the necessary details and instructions required to complete the build. Links to a free copy of the book are on this site (or I can send it). I have an exhaustive build thread herein (see My Coop for a quick pictorial).
Good luck, happy to answer any questions.
Ted