Housing

Chicken Roosts: Roost Bar Size, Height, Spacing and Space per Hen

Field guide · Updated November 3, 2026 · about 8 min read

Hens sleep perched off the floor, and the University of Kentucky says perches meet a behavioral need: birds "have a natural desire to perch and will use them if provided." Perching also keeps feet dry, which matters for frostbite, and gives hens low in the pecking order somewhere to get away (Kentucky ASC-246). This page collects the numbers extension services give for roost length per hen, bar size, height and spacing, and how to handle the manure that piles up underneath.

Short version: about 6 to 10 inches of roost per hen (more for large breeds), wooden bars about 2 inches wide with rounded edges or a flat 2 × 4, set roughly 1 to 2 feet off the floor, 10 to 18 inches apart and about a foot from the wall, never over feeders or waterers, with a removable board or tray underneath that you clean weekly (Oregon State, Penn State, Utah State, Kentucky, Minnesota, Maryland).

How much roost per hen: what each source says

Kentucky's 2021 guide says there should be enough perch for all birds to roost at the same time. The sources differ on how much bar that takes, from 5 inches per bird at the low end of Oregon State's range to about a foot per chicken in Kentucky's 2021 guide, which adds that larger breeds need more. The sources also disagree on height, from at least 12 inches (Minnesota) to as much as 40 inches (Kentucky ASC-246), and on the gap between bars.

For comparison, EU law for commercial laying hens (Council Directive 1999/74/EC) requires at least 15 cm of perch per hen (about 6 inches), perches without sharp edges and not mounted above the litter, at least 30 cm (about 12 inches) horizontally between perches and at least 20 cm (about 8 inches) from the wall. The inch conversions are ours.

Applied to common flock sizes, three points in that range give the totals below (our arithmetic). Several short bars add up the same as one long one. The coop space calculator uses Oregon State's 5 to 10 inches.

Bar size and shape

Oregon State recommends 1- to 2-inch square lumber with the top edges rounded off and warns that "poles that are too small or too round may cause foot problems." Utah State calls 2 × 2 material with rounded tops "ideal," and Penn State uses 2 × 2 boards. Ohio State gives a width of 1½ to 3 inches.

The sources do not agree on round bars. Missouri Extension's coop-space workshop lists 1½-inch dowels alongside 2 × 2 lumber, while Oregon State cautions against poles that are too round. A 2011 Poultry Science study (Pickel and colleagues) measured pressure on hens' keel bones and foot pads: square test perches gave lower peak force on the keel than round or oval ones, perch diameter made no significant difference, and soft polyurethane prototypes did better than the commercial steel and plastic perches tested. Peak pressure on the keel was about five times that on a single foot pad.

Winter: wide, wooden and flat

Maryland Extension says to build perches from wood, not metal or plastic pipe, which conduct cold to the feet and can cause frostbite, and to give them a flat surface like a 2 × 4 so birds can cover their feet with their feathers. Minnesota also says to avoid metal and plastic and recommends wooden 2 × 4 or 2 × 2 boards; roosting lets hens sit on their feet to warm them. More cold-weather steps are in winter care.

How high

Height is where the sources spread most. Oregon State and Penn State put bars about 2 feet up. Minnesota says at least 12 inches. Kentucky's 2018 urban-poultry guide gives 13 to 18 inches; its 2021 facility guide gives 16 to 40 inches and says the right type, size and height depend on species, breed and age. Utah State sets an upper limit of about 3 feet, because higher roosts may bruise feet or rupture eggs as hens mount them, and asks for at least 12 inches of clearance underneath so manure can be cleaned out.

• Silkies and other birds that can't fly well. Oregon State says roosting poles for Silkies "should be only 1 foot off the ground," and that specific breeds may have different requirements. See the Silkie and Cochin breed pages.
• Large breeds. Kentucky says larger breeds need more roosting area and more distance from walls and equipment.
• Ladder or level. Oregon State says poles can be set in a bed (all at one height) or a ladder formation; Kentucky ASC-241 describes bars 18 inches apart "like rungs of a ladder."

Where to put the roost

• Not over food or water. Kentucky (both guides) and Maryland say never to place roosts above feeders or drinkers, to keep droppings out of them.
• Out from the wall. Kentucky ASC-246 says at least a foot from walls, other perches and equipment, because birds like to perch with their backs to the wall; ASC-241 says birds may not use perches closer than 13 inches and can injure themselves.
• Out of the way of chores. Utah State places perches where they won't interfere with feeding, watering and egg gathering.
• Relative to the nests. Penn State puts nests away from the roosts. Oregon State says to avoid placing nest boxes on the ground or lower than the roosting poles, and to slope nest roofs at 45 degrees so birds don't roost on top. Details are in nest boxes.
• Room for everyone. Minnesota notes that heavier or more dominant birds may keep others away from feed, water or the roost; Kentucky says perches give low-ranking birds a refuge.

Manure under the roosts

Manure collects mostly under the roost, where the birds spend the night (Kentucky ASC-241); Utah State notes this helps keep the rest of the bedding cleaner. Kentucky ASC-241 says to clean under the roosts every week and compost the manure.

• Droppings board. A board under the roosting area is common practice and collects manure free of bedding, which preserves the litter (Kentucky AEN-167). Boards are usually wood; galvanized steel, aluminum, stainless steel or plastic can build or cover them.
• Trays. Minnesota suggests trays below the roosts to make cleaning easy.
• Removable perches. Utah State recommends perches that lift out or are hinged out of the way for cleanout.

Litter depth and composting are covered in coop bedding and litter.

Roosts for chicks and pullets

Missouri Extension's brooding guide says to install low roosts for future layers at four to six weeks of age, with 4 inches of roost per chick. Its coop-space workshop notes that you may have to teach birds to use roosts. Week-by-week brooder steps are in chick care for the first 8 weeks.

Roost checklist

1. Multiply hens by 6 to 12 inches; give large breeds the upper end.
2. Use wooden bars about 2 inches wide with rounded edges, or a 2 × 4 laid flat for cold climates; skip metal and plastic.
3. Set bars roughly 1 to 2 feet up, lower for Silkies and heavy birds, and no higher than about 3 feet.
4. Space bars 10 to 18 inches apart and about a foot from walls.
5. Keep feeders, waterers and nest boxes out from under the roost.
6. Fit a droppings board or tray with at least a foot of clearance, and clean it weekly.
7. Add low roosts for pullets at four to six weeks.