Small-scale poultry coops seem to be built in almost every possible shape and size. Those building a new coop may find a range of plans on the internet. Rather than building a new . Improving Conditions · There With The Animals · See The Reports · You Can Make a Difference. These free PDF chicken coop plans offer sizes from small chicken coops to a large chicken houses—much like the mini-barn I built in that was a lot of work to make without any .