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How Much Roost Space Per Chicken?
The whole house for six hens, roost included, is the 6-hen coop page. This page is only the bar.
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Per-bird roost figures
| Figure | Amount | Source |
|---|---|---|
| Standard perch, Utah | 6-10 in | Utah State Extension. Also no more than about 3 ft high, at least 12 in clearance underneath, bars 14 in apart, 2x2 with rounded tops. |
| Standard perch, Penn State | 6 in | Penn State Extension. Roosts 1 ft apart, 18-24 in above the floor, never more than 4 ft off the floor. |
| Standard perch, Maryland | 6-7 in | Maryland Extension. Roosts at least 2 in diameter, higher than the nest boxes, nests and roosts 24 in above the floor. |
| Bantam perch | 4 in | Penn State Extension, 12-18 in above the floor. |
| Large meaty breeds | no perches | Penn State Extension. |
Length, height, and spacing are three different measurements, and the sources do not collapse them into one number. A 6 in Penn State roost can still be wrong if it is 5 ft off the floor, because Penn State Extension says never more than 4 ft, and Utah State Extension says no more than about 3 ft with 12 in of clearance under the perch. Maryland Extension wants the roost higher than the nest boxes and gives both nests and roosts at 24 in off the floor, plus a bar at least 2 in in diameter.
Bantams do not inherit the 6 in. Penn State Extension cuts them to 4 in and drops the height to 12-18 in. Ten bantams are worked on the 10-bantam page. Large meaty breeds get no perches at all on the Penn State page, so do not saw a bar for that row.
Worked lengths
| Flock | Utah 6-10 in | Penn State | Maryland 6-7 in |
|---|---|---|---|
| 6 standard hens | 36 in (3 ft) to 60 in (5 ft) | 36 in (3 ft) | 36 in (3 ft) to 42 in (3 ft 6 in) |
| 10 standard hens | 60 in (5 ft) to 100 in (8 ft 4 in) | 60 in (5 ft) | 60 in (5 ft) to 70 in (5 ft 10 in) |
| 12 standard hens | 72 in (6 ft) to 120 in (10 ft) | 72 in (6 ft) | 72 in (6 ft) to 84 in (7 ft) |
| 10 bantams | not the 6-10 in line | 40 in (3 ft 4 in) at 4 in | use the bantam line |
Each cell is the bird count times the per-bird inches, then divided by 12. Sources for the rates are in the table above.
How to size it
Pick the bird type first. Standard hens have three published lengths. Bantams have one. Large meaty breeds have a published refusal.
- Standard length. Multiply the head count by 6 in (Penn State Extension), by 6 and by 7 in (Maryland Extension), and by 6 and by 10 in (Utah State Extension). Divide each product by 12.
- Six hens, as a check. 6 × 6 = 36 in, which is 3 ft. 6 × 10 = 60 in, which is 5 ft. 6 × 7 = 42 in, which is 3 ft 6 in.
- Height. Standard bars go 18-24 in up and stop at 4 ft (Penn State Extension). Utah stops near 3 ft and wants 12 in clear underneath. Bantam bars go 12-18 in up.
- Spacing and shape. Leave 1 ft between roosts (Penn State Extension) or 14 in between bars (Utah State Extension). Use a 2x2 with rounded tops (Utah State Extension) or a bar at least 2 in in diameter (Maryland Extension).
- When one wall is too short. The 15-chicken page shows a case where 12 ft 6 in of Utah roost is longer than the 10 ft wall of that example coop. Add a second bar at the spacing above instead of shortening the inches.
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Related
- Chicken coop size calculator — any other bird count.
- Coop size for 10 chickens
- Coop size for 15 chickens, where one bar runs out of wall
- Bantam roost: 4 in and 12-18 in high
FAQ
How much roost space per chicken?
Utah says 6 to 10 inches of linear perch per chicken. Penn State says 6 inches for standard chickens and 4 inches for bantams. Maryland says at least 6 to 7 inches. Divide by 12 to convert inches to feet.
How high should a chicken roost be?
Penn State places standard roosts 18-24 inches above the floor and never more than 4 ft off the floor. Bantam roosts on that page are 12-18 inches above the floor. Utah says perches no more than about 3 ft high, with at least 12 inches of clearance under them.
How far apart should roost bars be?
Penn State spaces roosts 1 ft apart. Utah spaces perch bars 14 inches apart. Maryland says roosts should be higher than the nest boxes, and it places nests and roosts 24 inches above the floor.
What lumber works as a roost?
Utah says a 2x2 with rounded tops is ideal. Maryland says roosts at least 2 inches in diameter. Penn State says not to give perches to large meaty breeds.
Sources
- Utah State University Extension, "Housing Backyard Chickens" (peer-reviewed fact sheet, 2008). https://extension.usu.edu/poultry/research/housing-backyard-chickens. Accessed Oct 2, 2026.
- Penn State Extension, "Small Scale Poultry Housing" (updated June 25, 2026). https://extension.psu.edu/small-scale-poultry-housing/. Accessed Oct 2, 2026.
- University of Maryland Extension, "Housing Requirements" (updated May 11, 2022; space table from Clauer, 2009). https://www.extension.umd.edu/resource/housing-requirements. Accessed Oct 2, 2026.