How big does the coop need to be?

One chicken is permitted for every four square feet of indoor enclosure and 10 square feet of outdoor enclosure, up to a maximum of eight chickens. The coop needs to be predator-proof and thoroughly ventilated, designed to be easily accessed and cleaned, and of sufficient size as determined by the Health Commissioner to permit free movement of the animals, not to exceed 50 square feet inside the coop.