@Alaskan explained it well.
But here's some tips about heights of stuff:
https://www.backyardchickens.com/articles/coop-stack-up-how-high-stuff-works-well.73427/
Coop is 60"(5') x 49.5"(~4')?
So....20sqft?
Coop space is very important in your climate, the height of the coop is not conducive to good winter ventilation. Coop shown needs a lot of work before being ready for birds.
Welcome to BYC! @eira_barbara
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