Coop size - how does verticals space factor in?

[aart]

I like having the roost/poop board high enough off the floor that the birds can easily walk under it. (Like what aart has shown in her coop in her article.)

I set the nests so they can walk under it and the roost/board so it's easy for me to reach.

 

[Silexian]

I think vertical space is more important for ventilation and ease of cleaning. I built a couple of 4ft. X 8ft. coops. They have 4ft. walls. I added a steep pitched roof so that I can stand up in them. I am 6ft. tall. The roof is 6ft. 6in. tall at the bottom of the peak. I added eave and gable vents which are above where the chickens roost. These coops are much easier to clean. Than the coop that I have to clean while leaning over in the doorway.