Before you spend time and money building your coop, do some research on the Woods open air style coop. This coop works well in all climates, including snow country. Also, do some research on deep litter management in both coop and run. This style of management will make your coop/run care super easy, eliminate odors, and provide a great amount of rich black compost for your gardens (or if you don't garden, you could even sell the stuff!) To do DLM successfully, I recommend a walk in style coop AND RUN! THe woods coop would give you coop/run in a single unit and the birds would benefit greatly from year round fresh air. Though, even if I was blessed with a Woods coop, I would still provide an extra run. Birds crave lots of space. Crowded birds are stressed birds. General recommendation is for AT LEAST 4 s.f. in coop and 10 s.f. in run per bird. Ventilation: 1 s.f./bird or 10% of floor space, which ever number is greater.
As for location: A diagram of your lot, including compass orientation would be helpful. Generally: Some or a lot of shade is good. Windows and doors on South and East (especially if prevailing winds and storm patterns come from the west)
Far enough away from neighbors that chicken cackle and any transient poo odors will not be noticed. A privacy fence can help greatly. Close enough to house so that you don't have to do a lot of shoveling to go out to tend birds in a storm, and close enough so that you can easily run power to coop.
Check your building codes regarding size and "permanence of structure" so that you don't get zapped with a huge property tax bill increase.