This coop has a covered and fully screened footprint of ~ 6ft x 13 ft; the actual coop/house is 6ft x 8ft. This size coop can comfortably host 8-12 chicken, assuming the hens also have regular access to a larger run (4 sq ft per chicken is a common rule].
I've used Sketchup to draw and document my coop design. I've used Sketchup Pro 8 do create the files, but the free Sketchup Make should allow you to view and modify the files as well.
To load the design files into Sketchup, it is best to clone this repo; files can be found here: sketchup.
The drawings are also viewable as PDF file doc/Chicken coop layout.pdf.
TODO: add making of this coop and some cost estimation
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