How much space do chickens need?
The numbers most extension offices and experienced keepers agree on: 4 square feet of coop and 10 square feet of run per standard hen, 8 to 10 inches of roost each, and one nest box per three or four hens. More is always better.
Space per hen by size
| Per hen | Bantam | Standard | Large or heavy |
|---|---|---|---|
| Coop floor | 2 sq ft · 0.2 m² | 4 sq ft · 0.37 m² | 5 sq ft · 0.46 m² |
| Run | 6 sq ft · 0.55 m² | 10 sq ft · 0.93 m² | 12 sq ft · 1.1 m² |
| Roost bar | 6 in · 15 cm | 10 in · 25 cm | 12 in · 30 cm |
| Nest boxes | 1 per 3 to 4 hens, minimum 1 | ||
| Feeders and waterers | 1 of each per 10 hens, so no hen gets bullied off the food | ||
Bantams: Silkies, Sebrights, Seramas and the bantam versions of big breeds. Standard: Leghorns, Rhode Island Reds, Australorps, Easter Eggers and most hybrids. Large: Orpingtons, Brahmas, Jersey Giants, Cochins. The coop and run calculator does the arithmetic for your count and breed, in feet or meters.
Worked example: six standard hens
- Coop floor: 24 sq ft, so about 4 × 6 ft inside.
- Run: 60 sq ft, so about 6 × 10 ft.
- Roost: 60 inches of bar, one 5 ft 2×4 with the wide side up.
- Nest boxes: 2.
- One feeder, one waterer, with a second waterer in summer.
Rules that matter more than square feet
- Ventilation high, drafts low. Vents near the roofline let moisture and ammonia out. Nothing should blow across the roost at night.
- Hardware cloth on every opening. Half-inch mesh. Chicken wire keeps chickens in and nothing out.
- Roosts above nest boxes. Hens sleep at the highest point they can reach. Make that the roost.
- Room to clean. A walk-in coop saves your back every week for years. If it is a small coop, make a whole wall open.
- Shade and dust. Part of the run in shade, with a dry patch of loose dirt for dust baths. That is their bathing and their air conditioning.
- Build for the flock you will have. Chicken math is real. Size for two more hens than you are starting with.
Half-inch hardware cloth keeps out what chicken wire can’t. It’s sold by the roll, so measure every opening first.
Paid link Half-inch hardware cloth on Amazon →
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What crowding looks like
Feather picking, a hen with a bare back, eggs eaten in the nest, a bird that hides in a corner, droppings building up faster than you can manage. Every one of these shows up first when space is short, and the fix is more room before it is anything else.
Check the rules before you buy lumber
Most cities and HOAs cap the flock (often 4 to 6 hens, no roosters) and set a distance from property lines for the coop. A quick search of your town plus "chicken ordinance" saves an expensive move later.
Common questions
How much space do 6 chickens need?
At least 24 square feet of coop floor and 60 square feet of run for six standard hens, so a 4 by 6 foot coop and a run around 6 by 10. Give them more if you can; crowding is the root of most pecking problems.
Can chickens stay in the coop all day?
Only if the coop is sized as a coop-and-run combined, roughly 10 square feet per hen, with light and ventilation. A standard 4 square foot per hen coop is a bedroom, not a home; hens kept in it all day get bored and turn on each other.
How many nest boxes do I need?
One for every three to four hens, and never fewer than one. Hens share and usually all pick the same box anyway. A 12 by 12 inch box suits standard breeds; 14 inches for large ones.
How high should the roost be?
About 18 to 24 inches off the floor for standard breeds, lower for heavy breeds that land hard, and always higher than the nest boxes or the hens will sleep in the boxes and dirty the eggs. Allow 8 to 10 inches of bar per hen.
Run your own numbers. The free coop & run size calculator does this math for your flock in a few seconds. Nothing is saved.