Coop Size Guide
Chicken Coop Size for 10 Hens
Ten hens is where a backyard flock becomes a small enterprise — here is the setup that size of flock actually needs.
The short answer: 35–40 sq ft of coop
Standard hens need 3.5–4 sq ft of coop floor each, so 10 hens need 35–40 sq ft. The buildable footprint that lands right on the comfortable end is 5 × 8 ft — exactly 40 sq ft. A 6 × 6 ft coop (36 sq ft) covers the lower end if floor space is tight, but the 5 × 8 gives the flock, and you, a little more room to work in.
The full plan for 10 hens:
| Item | For 10 hens |
|---|---|
| Coop floor | 35–40 sq ft (suggested build: 5 × 8 ft) |
| Run | 100 sq ft (e.g. 10 × 10 ft) |
| Roost bar | ~10 ft in total (e.g. two 5 ft bars) |
| Nesting boxes | 3 |
Run space is calculated at 10 sq ft per hen, roost at about 1 ft per bird, and nesting boxes at one per 3–4 hens — the planning figures used by every FlockCalc calculator.
Choosing the footprint: why 5 × 8 beats 4 × 8
The tempting shortcut is the standard 4 × 8 coop stretched to 10 hens. The maths says no: 32 sq ft ÷ 10 hens is 3.2 sq ft per bird, under the comfortable range, and a flock of 10 generates enough droppings and enough flock politics that the missing floor shows up quickly. Our 4 × 8 coop guide counts that footprint at 8 hens for exactly this reason.
The 5 × 8 keeps the same easy-to-build proportions — it is still a one-sheet-wide building job in most materials — while landing on 40 sq ft. If you would rather check a footprint of your own, the Chicken Coop Size Calculator works in both directions: flock size to floor area, or the floor you have to the flock it honestly holds.
100 sq ft of run is not optional garnish
Ten hens outdoors means 100 sq ft of run at 10 sq ft per bird. In practice the shape matters as much as the area: a long run lets hens put distance between each other and gives you a strip you can rest and rotate, while a compact square wears out evenly and quickly. If your birds free-range for much of the day the run can be plainer, but the area figure should still be the starting point.
The Chicken Run Size Calculator converts the 100 sq ft into dimensions that fit your plot, fencing length included.
Roost and boxes at flock-of-10 scale
Ten hens need about 10 ft of roost. In a 5 × 8 coop that is usually two 5 ft bars at the same height — same-height bars matter, because a higher bar becomes the prize every hen fights for at dusk. Keep the roosts above the nesting boxes so nobody sleeps in the boxes.
Three nesting boxes cover 10 hens at one box per 3–4 hens. A row of three along the short wall keeps them out of the roost’s droppings line and leaves the floor clear. The Nesting Box & Roost Calculator confirms both figures for any flock size you are weighing up.
Before you commit to 10
Ten hens is a genuine step up in feed, bedding and mucking-out from the starter flock of 6 — and in eggs. Size the rest of the system with the same honesty as the coop: our space guide explains the rates behind every number on this page, and why they are worth holding to when a seller suggests smaller.
Frequently asked questions
How big should a coop be for 10 chickens?
Plan on 35–40 sq ft of coop floor: 10 hens × 3.5–4 sq ft each. A 5 × 8 ft coop gives exactly 40 sq ft and is the natural buildable footprint; a 6 × 6 ft coop at 36 sq ft just covers the lower end.
How much run space do 10 hens need?
About 100 sq ft — 10 sq ft per hen. A 10 × 10 ft run is the simple version; a 5 × 20 ft run gives the same area with more room for birds to spread out.
How many nesting boxes and how much roost for 10 hens?
Three nesting boxes (one per 3–4 hens) and about 10 ft of roost bar (about 1 ft per bird), usually built as two 5 ft bars.
Is a 4×8 coop big enough for 10 hens?
It is a squeeze. A 4 × 8 coop has 32 sq ft, which works out to 3.2 sq ft per bird for 10 hens — below the 3.5 sq ft lower end of the comfortable range. Eight hens is the honest count for that footprint; 10 hens want the 5 × 8.
The bottom line
For 10 hens, build 35–40 sq ft of coop — a 5 × 8 ft footprint is the natural fit — and put 100 sq ft of run, about 10 ft of roost and 3 nesting boxes around it. Counted that way, a flock of 10 stays calm, clean and easy to run.