Coop cost calculator: buy vs build
Size the coop your flock actually needs, then compare what it costs to build against what an equivalent prefab costs — including the part most comparisons leave out, which is your time.
The capacity gap nobody mentions
Prefab coop listings advertise how many chickens fit, not how many can live there. A coop sold as suitable for 6 hens typically offers around 10 sq ft of floor — real space for 2–3 standard hens at the space-per-bird you selected.
This is why buy-vs-build comparisons flatter the prefab: they compare a $400 coop against a $700 build without noticing the $400 coop is a third of the size. Compare per usable square foot and the picture changes.
What the estimate includes
| Coop shell | Framing, siding, roofing, floor, fasteners — priced per sq ft by the quality tier you chose |
|---|---|
| Run | Posts, framing, ½-in hardware cloth walls, apron and cover — the expensive part |
| Fit-out | Roost bars, nest boxes, hinges, two-step latches, vents (about $95) |
| Not included | Tools you don't own, delivery, concrete piers, feeder and waterer, bedding |
Material prices vary a lot by region and by year — treat the output as an order of magnitude for planning, then price your actual cut list at your own lumber yard. The plans come with the cut list to do exactly that.
Common questions
- Is it cheaper to buy or build a chicken coop?
- Building is almost always cheaper per square foot of usable space — typically $15–30 per sq ft in materials against $60–120 per sq ft for a comparable prefab — but only if you already own tools and value your time at zero. The honest comparison is not price against price; it is price against size, because most prefab coops hold far fewer birds than the listing claims.
- Why are prefab coops rated for so many chickens?
- Because the ratings describe birds physically fitting inside, not birds living well. A coop advertised for 6 hens commonly offers 8–12 sq ft of floor — genuine space for 2 to 3 standard hens at 3–4 sq ft each. Halving the advertised capacity is a reliable rule of thumb.
- How much does it cost to build a chicken coop?
- For a 4×6 ft walk-in-height coop with a 6×10 ft covered run, expect roughly $500–900 in materials at current US lumber and hardware-cloth prices, plus 20–40 hours of work. Reclaimed materials can cut that by half; premium siding and metal roofing push it higher.
- What is the most expensive part of a chicken coop?
- Usually the run, not the coop — hardware cloth is expensive per foot, and a properly covered, apron-protected run uses a lot of it. Skimping there is also the single most common cause of predator losses, which is why it is the last place to save money.