Horse Stall Planner
Full Barn Layout
Hay Storage Calculator
Tack & Feed Room Sizer
Wash Rack Planner
Equipment Bay Sizer
Check the equipment you will park in the bay (each adds 2 ft of clearance length; the bay is 4 ft wider than your widest machine).
Barn Cost Estimator
Planning estimates only, not a quote - labor, permits, site work, and utilities vary widely by region.
Worked examples
- 4 average horses: 12 × 12 ft stalls, 12-ft aisle, two rows → a 24 × 36 ft barn shell of 864 sq ft (576 sq ft stalls + 288 sq ft aisle).
- 6-horse full barn: six 12 × 12 ft stalls, 12-ft aisle, tack + feed + wash rooms → 36 × 72 ft = 2,160 sq ft.
- Hay for 4 horses: about 19.5 tons per year → 976 forty-lb bales, roughly 4,878 cu ft, about 610 sq ft stacked 8 ft high.
- Cost check: that 2,160 sq ft barn as a mid-range pole barn with slab → $75,600 structure + $17,280 slab + $9,288 contingency = $102,168.
Methodology & planning standards
| Item | Planning standard | Notes |
|---|---|---|
| Horse stall | 12 × 12 ft (144 sq ft) for an average ~1,000 lb horse | Extension-standard; 10 × 10 ft for ponies, 12 × 14 ft for large horses, 14 × 14 ft for drafts |
| Barn aisle | 12 ft minimum | 10 ft small private barns; 14-16 ft if driving machinery through |
| Tack / feed / wash rooms | 12 × 12 ft each | 144 sq ft; one wash bay per 10 horses (min 1) |
| Hay consumption | 2-2.5% of body weight per day | Plus 8% waste allowance; 250 cu ft per ton stacked |
| Small square bale | ~40 lb | Round bale ~1,000 lb |
| Tack room rule | ~15 sq ft per rider, 144 sq ft min | Feed room: ~6 sq ft per horse, 96 sq ft min |
| Equipment bay | Widest machine + 4 ft; lengths + 2 ft each | Clearance for doors and maneuvering |
| Construction cost | Pole $25-45 / steel $35-70 / wood $45-90 per sq ft | Plus slab ~$8/sq ft and 10% contingency |
Standards above are widely used planning figures from equestrian facility guidance (stall and aisle dimensions per university extension-style barn design references; hay figures per equine nutrition sources). They are starting points for planning - verify with your local builder and equine professionals before building.
Frequently asked questions
How big should a horse stall be?
A 12 x 12 ft stall (144 sq ft) is the standard recommendation for an average horse of about 1,000 lb. Ponies do fine in 10 x 10 ft stalls, large horses (16-17 hands and up) do better in 12 x 14 ft stalls, and draft breeds typically need 14 x 14 ft. Stall walls under 10 ft are not recommended, because the horse must be able to turn around, lie down, and get up safely.
How wide should a horse barn aisle be?
Keep the barn aisle at least 12 ft wide. That gives two horses (or a horse and handler) room to pass safely and leaves space to maneuver equipment. Small private barns sometimes use 10 ft aisles, while barns that need to drive a truck or tractor through should plan 14 to 16 ft aisles.
How much hay should I store per horse for a year?
Plan on about 2 to 2.5% of body weight per day in hay. For a 1,000 lb horse at 2.5% per day over 365 days with an 8% storage and feeding waste allowance, that is 25 lb/day x 365 days x 1.08 = 9,855 lb of hay, or about 4.9 tons. In 40-lb small square bales, that is 247 bales per horse per year - round up rather than down.
How much floor space do I need for hay storage?
Budget roughly 250 cubic feet of stacked space per ton of small square bales. Four 1,100 lb horses need about 19.5 tons of hay per year, which is roughly 4,878 cu ft of hay. Stacked 8 ft high, that needs about 610 sq ft of floor space - roughly a 24 x 26 ft hay room.
What size should a tack room and feed room be?
A 12 x 12 ft tack room (144 sq ft) suits most small barns, and a separate 12 x 12 ft feed room works well too. As a planning rule, allow about 15 sq ft of tack room per rider and about 6 sq ft of feed storage per horse, with 144 sq ft and 96 sq ft minimums respectively. Nobody ever complained about a tack room being too big.
How many wash racks does a barn need?
Plan one 12 x 12 ft wash bay for every 10 horses, with a minimum of one bay even for a small barn. Four horses need one bay (144 sq ft); a 25-horse boarding barn needs three bays (432 sq ft).
How big should an equipment bay be?
Size the bay width to your widest machine plus 4 ft of clearance, and the length to the sum of each machine's length plus 2 ft of clearance per unit. A full-size tractor (8 x 14 ft), a 16-ft stock trailer (7 x 20 ft), and a compact tractor (6 x 11 ft) need a 12 x 51 ft bay - 612 sq ft.
What does it cost to build a barn per square foot?
Ballpark construction ranges run $25-45/sq ft for a pole barn, $35-70/sq ft for a steel frame, and $45-90/sq ft for conventional wood framing, plus a concrete slab at roughly $6-10/sq ft and a 10% contingency. A 2,160 sq ft pole barn at mid-range pricing works out to $75,600 structure + $17,280 slab + $9,288 contingency = $102,168 - treat this as a planning estimate, not a quote.
How big a barn do I need for 6 horses?
Six average horses in 12 x 12 ft stalls, two rows, a 12-ft aisle, plus a tack room, feed room, and wash rack (each 12 x 12 ft) works out to a 36 x 72 ft barn shell (2,592 sq ft). The stalls, rooms, and aisle come to 2,160 sq ft of functional area: the stalls take 864 sq ft, the three rooms take 432 sq ft, and the aisle takes 864 sq ft.
How big should a run-in shelter be?
For a three-sided open run-in shelter, plan about 80 to 100 sq ft per horse - for example, a 12 x 24 ft shelter comfortably holds three horses. Horses need enough room to all get out of the weather without being cornered, and adding a loafing shed or paddock rotation reduces the pressure on the shelter.
Related tools
- Acreage Calculator - measure and convert land area for your pasture or building site.
- Horse Blanket Lab - blanket sizing and fit guidance for your horses.