Mine was close to $1200 but that is for an 8' x 12' with an attached 20'x17' covered 7' tall run, automatic door opener, automatic watering system and built to withstand a direct hit from a falling space station. And it's pretty.
So far, about $100 and I've gotten a lot of stuff for free, barter or very cheap.
I invested in a 6ft tall chainlink walk gate - for a pricy $55, because I couldn't find anything used and I was afraid that anything I built would cause me more frustration than a few meeeeesly dollars were worth.
Well, judging by some of you, I think mine wouldn't be so bad after all. Most of the lumber (2x4, 2x6 etc.) we already have, I'd just have to fork out about $200 for the sheet wood. I'm sure it will be more than that, once it's finished, but I guess that's not so bad. I'm planning a 12x16 building, with 16-24 'pens' inside. So we'll see if I can stay 'under budget'
I couldn't imagine paying over $1000 for a chicken house!