A flock of 12 hens needs 3 nesting boxes. That’s the short answer, and I’d bet it’s fewer than you were about to build. The working rule is one box for every 4 hens, never fewer than 2, set in the darkest quiet corner of the coop, about 18 inches off the floor.
Honestly, the count is the easy part. A box in the wrong spot sits empty while your hens lay behind the feeder. So once we’ve got the number down, I’ll get to where the boxes go, because that’s what decides whether anybody uses them.
I keep 12 hens myself, so 3 is my number. For the rest I went to the people who’ve tested this on a lot more birds than I’ll ever own. I read Ask Extension, the University of Georgia, Manitoba’s farm department, Oregon State and Tractor Supply, and they don’t agree on everything. Where they split, I’ll tell you.
If you’d rather skip the arithmetic, our free [chicken coop size calculator](https://chickenrise.com/tools/chicken-coop-size-calculator/) counts your boxes along with your floor space.
How Many Nesting Boxes Do You Need?
Figure one box for every 4 hens. That sits right in the middle of what the sources say:
- Tractor Supply: one for every 4 hens, and at least 2 if you keep 4 or fewer
- Oregon State: one for about every 4 birds
- Ask Extension: one for every 4 to 5, and at least 2 even in a small flock
- University of Georgia: at least one for every 5
- Manitoba: one for every 3 to 4
Nobody’s far apart, are they? So round up, and don’t stop at 1 box even if you’ve only got 3 hens. Two boxes means one hen can go broody and sit tight for weeks (and she will) while the others still have somewhere to go.
Why does 1 box stretch across 4 birds? They don’t all want it at once. Georgia’s guide says a hen starts her pre-laying behavior an hour or two before the egg arrives, so they kinda rotate through the morning. A flock of 20 gets by on 5 boxes for the same reason.
Could you build extra just in case? Sure. It costs you a few boards and nothing else. Too few is the mistake that costs you. Georgia says competition for nests sends hens to the floor, and floor eggs are dirtier and more likely to get eaten.
How Big Should a Nesting Box Be?
A 12-inch cube fits most hens. Ask Extension and Oregon State both give 12 inches wide, 12 tall and 12 deep, and that’s what you’ll see drawn on most coop plans.
Tractor Supply gets pickier and sizes by bird. Bantams get 10 inches wide, 12 high and 10 deep. Leghorns and other light breeds get 12 wide, 14 high and 12 deep. Heavier hens get 14 wide, 14 high and 12 deep. Ask Extension also says Jersey Giants and Brahmas need more room than the standard cube.
Got a mixed flock? Build for your biggest bird. A bantam will happily use a 14-inch box, and a Brahma won’t fold herself into a 10-inch one.
Just don’t go wild. Georgia’s guide says the box only has to be big enough for her to stand up and turn around. Hens like it snug, and my birds are no different.
Where to Put Them in the Coop
Back of the coop, in the dimmest spot you’ve got. Ask Extension says a darker, quieter area. Tractor Supply says away from the pophole (that’s the little hen door). Think about what she’s after for an hour or two: a dim, closed-in place where nobody walks past her.
The doorway is the worst place in the whole coop for that. Everybody’s coming and going all day, and it’s the brightest spot you own. So keep the boxes on the far wall, away from the door.
Give each box a top and sides. Georgia says hens like enclosed places, and Tractor Supply wants nests closed on the top and sides both. If your only wall gets sun, hang a fabric flap over the front. A scrap of old feed sack does the job for free.
Keep them off the floor, too. Oregon State says not to set nest boxes on the ground or lower than the roosting poles, since it keeps them cleaner. It also puts a roof sloped at 45 degrees on top, so nobody sleeps up there and fouls the box below.
Fair warning, the sources fight about box height against the roost. Some want roosts higher, and some want them lower. I laid that whole argument out in my [bucket nesting box guide](https://chickenrise.com/bucket-nesting-box-will-save/). What they all want is the same result: nobody sleeping in the boxes. If you’re still planning your roost, my [chicken roost ideas](https://chickenrise.com/chicken-roost-ideas/) will help.
How High, and Do They Need a Perch?
Aim for about 18 inches off the floor. Here’s why I like that number. Georgia says heavy breeds shouldn’t have to go higher than 18 inches unless you add a ramp. Tractor Supply says to raise nests to at least 18 inches once your pullets have learned where they are. Those two rules meet at the same height, which almost never happens.
Yes, a hen can get a lot higher than that when she feels like it. That doesn’t mean a heavy bird should land from there with an egg on the way. If you’ve got big hens and a tall box, Oregon State’s fix is a chicken-size ladder on a slant.
Give her a place to land. Georgia puts a perch at the entry to each nest, and Tractor Supply says to keep it no closer than 8 inches from the opening. Add a low sill across the front, too. It holds the bedding in, so it isn’t all on your coop floor by Tuesday.
What Goes in the Box
Bedding does two jobs. It cushions the egg, and it makes the box worth using. Georgia’s guide says hens without litter in the nest would just as soon lay on the floor.
Most of us use whatever’s cheapest at the feed store. These all work:
- Pine shavings, my pick for the money
- Straw, which Georgia names along with shavings
- Dried grass clippings, if they’re really dry
- Shredded paper
- Plastic turf pads or excelsior, which Tractor Supply also lists
Two or 3 inches is plenty for most boxes. The sources run from 1 inch to 6, and I went through those numbers in the bucket guide. Ask Extension’s one hard rule is that the material has to stay clean. Soiled bedding means soiled eggs, and that’s a job you’ll be doing at the sink. My guide to [collecting, cleaning and storing fresh eggs](https://chickenrise.com/collect-clean-store-fresh-eggs/) covers the rest of that.
Cheap Nesting Box Ideas That Actually Work
You don’t need a saw for most of these. Hens don’t care what it used to be, so long as it’s the right size and dark inside.
A 5-gallon bucket on its side is my favorite cheap box. Oregon State calls it “a creative alternative to the traditional wooden nesting box.” The mouth comes in around 12 inches, so it matches the standard cube. Use a food-grade one, and read the [bucket guide](https://chickenrise.com/bucket-nesting-box-will-save/) first, since there’s a catch on head room.
A milk crate on its side works too, though the holes let bedding fall out. Line it with cardboard, and measure it against the sizes above before you hang one.
A plain wooden box is still the one to beat for a permanent coop. It’s dark and solid, and you can build a roof onto it.
One idea I’d skip is the long open trough. Tractor Supply warns that a community nest big enough for more than one hen leads to broken eggs. Two birds in one box, and somebody steps on something.
When Hens Won’t Use the Boxes
If you’re finding eggs on the floor, or under a bush, work through it in this order. The cheapest fix comes first.
Start early if you can. Georgia says pullets should be poking around the nests a couple of weeks before they lay, so have the boxes open by then. Here’s [when pullets start laying](https://chickenrise.com/when-do-pullets-start-laying/), so you can count back.
Then try a fake egg. Ask Extension says hens like to lay where other eggs already are, so a plastic, ceramic, rubber or wooden egg in the box gives them the hint. Some folks have had luck with golf balls or rocks. Turns out she’s not fussy about the egg, only about the crowd.
Found her favorite spot under the shed? Block it off, or make it less attractive somehow. That’s Ask Extension’s advice, and it’s about as fancy as this gets. Leave it open and she’ll go right back.
Collect Often, and Close the Boxes at Night
Manitoba says to collect eggs at least twice a day, and I’d take that seriously. An egg left in the nest can get stepped on, and a broken one teaches hens that eggs are food. For how long one can safely sit, see [how long eggs can stay in the coop](https://chickenrise.com/how-long-can-chicken-eggs-stay-in-the-coop/).
Manitoba also says to close the boxes at night so hens don’t roost in them. A bird that sleeps in a box fills it with droppings by morning. A scrap board across the openings does it, as long as you take it down before laying time. This matters most with young birds still working out where they belong.
One last thing. A nest box isn’t protection. I’ve lost birds to a raccoon, and I can tell you they’re after the eggs as well. So fix the coop first with these [predator proof coop ideas](https://chickenrise.com/predator-proof-chicken-coop-ideas/), then worry about where the eggs land.
Start with 3 boxes for 12 hens, or whatever your flock’s number comes to. Put them on the far wall, keep them dim and watch which one they fight over. It’s always the same box, and no, I can’t tell you why.
Sources: Ask Extension, expert replies on nest boxes for hens; University of Georgia Extension, “Egg Laying Behavior”; Manitoba Agriculture, “Nesting Area Maintenance for Small Holder Poultry Flocks”; Oregon State University Extension, “Backyard chicken coop design” (EC 1644); Tractor Supply, “Chicken Nesting Boxes Know-How”.
Related read: How to Raise Chickens for Eggs — Instant PDF download. Secure checkout by Stripe
