Welcome to BYC. Where, in general, are you? Climate matters, especially when it comes to housing.
The Usual Guidelines
For each adult, standard-sized hen you need:

Oh no. I was hoping it would be comfortable for more hens.
The Usual Guidelines
For each adult, standard-sized hen you need:
- 4 square feet in the coop (.37 square meters)
- 10 square feet in the run (.93 square meters),
- 1 linear foot of roost (.3 meters),
- 1/4 of a nest box,
- And 1 square foot (.09 square meters) of permanent, 24/7/365 ventilation, preferably located over the birds' heads when they're sitting on the roost.
