If you can drive a nail into wood without bending it (usually) and if you can saw a straight line (that's often relative), you can probably pull off a hen-housing project using chicken coop building plans.
And, if you punch "chicken coop building plans" into your web browser, you'll see that there are a lot of folks out there who want to help you out.
Before you lumber into a coop-building project, you need to give some serious thought to a few matters:

• Your time - If you're going to have some pullets arriving the day after tomorrow by second-day air, you're probably not going to be finished in time.
  Or, if you can make fifty dollars an hour as a consultant, remember that a carpenter is usually paid around twenty-five dollars an hour; so you should probably just purchase.
  Yet, many do-it-yourselfers praise the therapeutic aspect of working with the hands, so that could probably be considered as time well spent.
  
• Your abilities - If you can handle a hammer, a saw, a drill, and a paint brush, you can probably build a chicken coop.
  Though only the simplest of carpentry skills is required for the more fundamental chicken coop building plans, it probably wouldn't be wise to use your coop building efforts as a Carpentry 101 class.
  
• Your tools - Tools are expensive; so you should consider what tools you may need to purchase to supplement those that you have stowed under the kitchen sink.
  The fundamental tools are mentioned above.
  Consider getting an electric saber or circular saw.
  You should probably have a tape measure, carpenter's square, and a level, too.
  Will you be able to put the tools you purchase to other uses?
• Your blueprints - You'll find blueprints so rudimentary that they don't even give specific lengths and widths, and some so incredibly complex they require an advanced degree in architecture.
  The best blueprints will offer a materials list along with cost estimates, a list of tools needed, as well as precise drawings and clearly explained steps.
  If you see "hints" scattered among the instructions, that's a good sign, too.
  

A multitude of free chicken coop building plans can be found on the Web.
These plans can range in complexity from a quick and easy, weekend project on to those that resemble an addition to a house.
Given the quantity and quality of free plans, you are probably not going to get any benefits from purchasing a plan, unless you find one that's just absolutely the coop of your dreams.
Yet, there are printed manuals as well as e-books that not only offer plans for building coops, but also cover many other aspects of caring for chickens.
These may very well be worth the price.
Some of the e-books are even packaged with instructional videos.
As you look through the available plans, make sure they include details regarding feeding and watering, space requirements, nesting boxes, roosts, cleaning, and ventilation, as these are all very important considerations for any chicken coop.
Keep in mind that you don't have to buy all your materials brand new.
You should ask to look at any scrap lumber that builders, carpentry shops, hardware stores (even big box stores) may have stacked around gathering dust.
The price will be very cheap or the manager might just like the fact that you're hauling the stuff away.
One coop builder recounts how he got a pack of roofing shingles for free at a house builder's site.
If you see a pile of old lumber stacked somewhere, look it over and find its owner if it has stuff you can use.
You may have to pull a few old nails or freshen up some rough edges, but the price is always right.
So, if you're a weekend warrior, or just have some time on your hands, you might want to give serious consideration to saving yourself some money by building a coop yourself.
Just be careful and match your skills to the complexity of the project or you could end up costing yourself twice what you would have paid for ready-made.
Many of the building plans are very clever when it comes to improvisation (old hat boxes as nesting boxes), or the materials used (one plan calls for nothing but PVC pipe).
Just be sure your chicken coop building plans are right for you, your skills, and your situation.