We live on a narrow plot of land a bit larger than our house (besides our side yard, but that is down into the swampy area kinda). Out back we have a lot of space, but there is an old shed that is probably a few years from falling down and behind that is a open area that is surrounded by trees and also woods on one side. Our lot is adjacent to a wetlands/swamp area and the other side is my neighbors. I was trying to figure out if it is best to put it close to the house or out back. Our back the smell would not be an issue, but up front it would, but there are foxes/coyotes and other things that do come around. I am gonna try to secure my coop and run as well as I can and that probably will be good for what we have going out there, but looking for best advice. Our house has a L shape out back, but not sure it would be such a great spot for a coop.
Lots of good points above. One thing I will mention is avoid any swampy, boggy areas if there's any that overlap into your yard. Quite a lot of my lot is wetland (stupidly we're designated as wetlands with 0% wetland *facepalm*) so even with 4 acres I was very limited in where I could put my coop and run. Good drainage is KEY in keeping odors down.
We ended up putting it about 20' in front of the living room (we technically have no backyard, so it's 4 acre front yard, and 10' of backyard LOL). The spot we chose is shady, good for being able to keep an eye on predators, easy access throughout the day and night. Smell isn't an issue, we use deep litter plus aforementioned excellent drainage at the location, and double paned windows means noise isn't too bad.