I looooove Wyo! I’m in Southern Ohio, so totally different weather, but I’d recommend checking out some of the coop designs on this forum. My coop is 10’ by 12,’ with windows all around, has a metal roof, and lots of ventilation holes around the roofline. Probably not what you need... If you’re not planning to get more chickens right away, you won’t need too much, but do plan on buying a flat panel heater. I would never recommend a heat lamp because of the potential for a fire. Here’s a link to the one I amplanningto buy for our coop:
https://smile.amazon.com/Cozy-Produ...ref_=ox_sc_act_image_1_1_1&smid=ATVPDKIKX0DER
Also, if you decide to insulate the walls or roof, you’ll want to make sure to install some type of wall to keep your girls from eating the insulation. Trust me, mine discovered that foam insulation around old windows is just delicious!
I use natural river sand in the coop and run. It’s cheap, easy to keep clean with a kitty litter scoop, and makes for year-round dust bathing. I’ve got three to four inches on the floor of the coop, about two inches on each of two poop boards under the four roosts andinthe nest boxes, and about ten to twelve inches in the run.
Because your weather is so extreme, I think you might want flat roosts for your girls so they can keep their feet covered at night. Our roosts are 1” by 2” boards, but you could just use a 2”x4” board with the 4” side up.
Other than that, everyone else here told me about “chicken math” when I was designing the coop and run. It’s a real thing. You may think you’re only going to have a few chickens, but you will end up with a lot more than you thought...


