You could of course, just buy a coop, but by building your own you will save money and get a great deal of satisfaction from making a home for a well-loved hen! 

This Short-e won't give you detailed plans on how to make a coop, but I will offer a taster of what sort of coops are suitable, depending on how many hens you want to keep, and where you will be able to keep them. If you are then inspired to build your own, information including plans are available on the internet.