We lost everything in the Bastrop TX wildfires of Sept 2011... so we know all about fires.
We've rebuilt our home and are now in the process, within the next couple of weeks, of building our first chicken coop! (Though I should say that both of us did grow up in rural areas/on farms and both of us had chickens as kids.)
I've read in the comments to this post that many coop/barn fires are caused by heater lamps and dust on the bulbs and... since we've already gone through the fire thing once, we'd REALLY like to avoid the fire issue. What, besides the heat lamp, will work for adult girls? And, can you install a smoke detector in a chicken coop? Our coop, since we are in the hot and humid Texas, will be open on one side with a secure dog kennel for the outer part of the pen. We'll only need a heat source occasionally in the winter.
And, just a thought for everyone... make sure your out buildings are listed on your home owners insurance. You want to make sure you have coverage in case the worst does happen. For that matter - check your home owners insurance and make sure you have enough coverage for your house too and ask them what you need to have to file a claim. Usually, a list of ALL items in your house (down to how many and what kind of undies you have and how many bottle of shampoo - not kidding) including model numbers and serial numbers. Disasters are traumatizing enough but sadly, as we've learned, the insult to injury comes from trying to get compensation from the insurance company.