Same money as the 8x8, and a different building entirely
This is the decision that defines the page. The 6x10 walk-in and the 8x8 walk-in both run $3,200-$4,100 in materials. Identical range. You aren’t choosing a budget here. You’re choosing a shape.
Here’s what the same money buys each way:
- The 6x10 gives you 47 square feet of coop, a 72 square foot run, 9 to 12 hens, 72-inch walls and a 32 by 70 inch access panel. It’s rated Intermediate at 36 to 44 hours.
- The 8x8 gives you 51 square feet of coop, an 80 square foot run, 10 to 13 hens, 76-inch walls and a 34 by 74 inch walk-in door. It’s rated Advanced at 40 to 52 hours.
On paper the 8x8 wins every capacity number by a little. So why build this one?
Two reasons. First, the site. A 6-foot-wide building goes places an 8-foot one can’t, and the next section is about exactly that. Second, the difficulty rating. If you’re a confident first-time framer rather than an experienced one, the Intermediate rating and up to eight fewer hours of labor are worth more than four square feet of floor.
If neither of those applies to you, the 8x8 is the better use of the same money. We’d rather tell you that here than have you find out after the posts are in.
A 22-foot strip is a fence-line coop
Overall length is 264 inches, 22 feet of coop and run in a line, on a footprint only 72 inches wide. That’s about 132 square feet of ground.
That shape suits side yards and back fence lines, the long leftover strips that most suburban lots have and that nothing else fits well. It suits them badly if your only open ground is a square patch, because a 22-foot building doesn’t turn a corner.
It also asks more of your ground than a compact coop does. The plan sits on 12 pier blocks, two more than the 8x8, spread along that 22-foot line. Every block has to come out level with the others. On a lot that falls toward one end, the low end needs deeper gravel pads or taller posts, and that’s a site problem to solve before you buy lumber, not during the build.
Drainage follows the same logic. Water running down a slope will run the full length of the run. Put the coop end at the high side so the building stays dry and the run takes whatever gets through. The run design guide covers keeping a long run from turning into a trough.
What it costs against its neighbors
| Plan | Coop floor | Run | Hens | Nest boxes | Walls | Materials |
|---|---|---|---|---|---|---|
| 6x8 walk-in | 37 sq ft | 60 sq ft | 7–10 | 3 | 72” | $2,900–$3,750 |
| 6x10 walk-in (this one) | 47 sq ft | 72 sq ft | 9–12 | 3 | 72” | $3,200–$4,100 |
| 8x8 walk-in | 51 sq ft | 80 sq ft | 10–13 | 4 | 76” | $3,200–$4,100 |
| 8x10 walk-in | 66 sq ft | 96 sq ft | 12–14 | 4 | 76” | $3,700–$4,750 |
Coming up from the 6x8 walk-in, the step to this plan costs $300-$350 and about six more hours. It buys 10 square feet of coop, 12 of run, 20 more inches of roost, a fourth window and two more hens at the top of the range. That’s $150 to $175 per extra bird of capacity, which is a fair price for not having to build a second coop in two years.
Going past this plan means going wider. There is no 6x12 in the line. The next step up in capacity is 8 feet wide, and the table shows the 8x8 offers only one more hen for the same money.
The nest bank doesn’t grow with the coop
This is the one thing that didn’t scale when the coop got longer. The 6x10 carries the same three nest boxes on a 45-inch bank as the 6x8 walk-in, even though it holds two more hens.
At 9 hens that’s one box per three birds, which is roomy. At 12 hens it’s one per four. The welfare standards and extension guidance land on one box per four to five hens as the ceiling, so twelve sits right on the line. You won’t have a crisis. You’ll have a queue on busy mornings, and a queue at the nest box is where hens start laying on the floor.
The roosts don’t have the same problem. 120 inches of roost bar across 12 birds is 10 inches each, the generous end of the published 6-to-10-inch range. At nine birds it’s more than 13 inches a hen.
If you’re planning to run this coop full at twelve, the nesting box guide covers the box-count math and what floor-laying looks like when you’ve cut it too fine.
Nine to twelve, and where each end sits
At 9 hens each bird gets 5.2 square feet of coop and 8 square feet of run. The run figure sits inside the 8-10 square feet per bird extension services recommend for outdoor space, so nine birds can live here full time without free-range days.
At 12 hens it’s 3.9 square feet of coop and 6 of run. The coop still clears the 3-4 square feet Oregon State and Virginia Tech publish for a coop with an attached run. The run doesn’t clear the outdoor guideline, which puts the birds out in the yard for part of most days.
Between those, ten or eleven is where this building is happiest. The nest boxes stop queuing and the run gives each bird six and a half to seven square feet.
Four windows on a narrow body
This design adds a fourth 18 by 23 inch window over the 6x8 walk-in, and the vent area steps from 3.3 to 4.2 square feet. On a building this narrow, both matter more than they would on a square one.
A long, thin coop has a lot of wall per square foot of floor. That’s good for light and airflow, and it’s bad for heat gain if the long wall faces the afternoon sun. Where summers are the hard season, which way the long side faces is worth deciding on paper, before the pier blocks go down. The ventilation guide covers where the permanent vent openings need to sit relative to the roost.
Who this plan is for
It’s for a flock of about ten in a yard where the open ground is long and narrow, built by someone who wants an Intermediate project rather than an Advanced one. The material list is 32 line items across 18 steps, including 148 feet of quarter-inch hardware cloth. Plan on five to six days.
The Intermediate rating is the other half of the case. The 6x10 skips the things that push the 8x8 into Advanced: it stands on eight posts instead of fourteen, its rafters run 83-3/16 inches instead of 110-15/16, and it roofs with six 8-foot metal panels rather than 10-foot ones. Shorter boards and lighter sheets are the difference between a job one careful person can mostly do alone and one that needs a helper on every lift.
If your ground is square and you’ve framed before, build the 8x8 instead for the same money. If you only need seven or eight hens, the 6x8 walk-in saves you $300 and a day.