Here is our insulated coop. Size:10 x 10 on the outside and 9 x 9 on the inside. My son and son-in-law are the creators of this coop, and used double sheets of foam board insulation (fiberglas loses it's insulation value if gotten damp.) We are still in the process of working on it, so please ignore the mess outside that is no longer there, and imagine it with siding and paint!
We also keep doves and quail in the coop.
We have an outside storage area for tools.
Quail cage above the nesting boxes
Feeder and waterers for the quail
Indoor storage area
We use an electric oil filled radiator style heater in the coop, which is now out from under the nesting boxes, elevated off the floor, and caged in. Notice next to the heater is a thermostat switch for the heater, so we can better manage the temperatures in the coop. Also, we put down some linoleum on the floor that we had bought for something else, and decided to use it here instead-linoleum-an absolute must-if you don't like cleaning out the coop!!!!! We also painted the inside an off white using a paint that resists mold, and is durable for cleaning.
Since I've got your attention
I thought I'd post my favorite picture, at about 2:30 p.m. (Yah, that's
afternoon with the sun setting up here,)
and one of our doves on the window sill-so peaceful-happy chickens, doves, and quail!