Might not be exactly what you're looking for, but here's my advice and what I've done. First off I agree with Cryss, most of those pre-fab coops are way too small and will be poorly insulated for the winter. What I did was actually order a custom coop from the Amish. There's a various coop companies online and they'll deliver them to you, totally set up. I'll warn you they are fairly expensive, but the quality is no joke. They're well insulated, spacious, and you can even get them on wheels. In addition to the coop, my dad built a run for the birds. Building a run is fairly easy and you can guarantee a lot of space for your birds, and even put a roof on the run (to prevent predators like hawks from flying in and keep rain out). You can also make sure you bury the wire under the dirt so predators can't dig underneath. You definitely don't have to do what I did, but I highly recommend you avoid most of the pre fab coops from the pet store and see if you can find a company or person that will build you one that's slightly larger and higher quality. I'm not from North Jersey, but maybe someone here can help you out.
