How much roost space do I need? Meghan July 30, 2018 14:55 Updated Follow Roosts are recommended for laying flocks and need an allowance of about 6-8 inches of space per chicken. Rounded roosts help prevent frost bite and the recommended diameter would be 1.5-2 inches (about the size of a ladder rung) Related articles How big should my coop be? How many nest boxes do I need? Poultry Feed Guidelines How big should my run be? How do you give a chicken a bath? Comments 0 comments Please sign in to leave a comment.