Our hens right now have a 6'x6' box that has a lot of straw in it. We keep it open for them right now and they poke around the yard. We built the "coop" for free, and it's certainly worked well.
It's not a good wintertime home. It needs to be more waterproof (we put tarps over it in the spring), and we'd prefer to have it closer to the house in the winter (so we can more easily check on them).
So, on the books is to build a new coop. Since they are free-range on non-rainy days, we have decided to make the coop a bit smaller. We'll have a roost area and a nesting box area, but we'll also have an open area inside for poking around.
This is all brought on by this weekend's weather. Horrible! Rainy, mucky, gross. The hens don't get it, and instead of staying under covers, they've gallivanted out in the rain.... and become soggy, cold things.
Since the girls clearly don't know better to stay inside on a bad day, we've decided to have an indoor only area for them in the wintertime. Big enough to stretch their legs and play about, but not so big as they'll lose body heat and get cold. By having it off the ground, they'll not get mucky.
Here's the concept plan:
We'll probably have ours a bit taller and a bit longer, but you get the idea. I'd like to be able to use the underneath as storage for food and straw.
We're also building it for four hens, since I would greatly love to get a Jersey Giant next spring.
It's a bit smaller than I would normally approve of, but since they're out and about in good weather, I don't feel so bad.