Pole barn cost = building package + erection labor + slab, doors and electrical; a 30 x 40 ft pole barn ready to use costs about $34,500 at US-average prices, roughly $29 per sq ft, with a range of $23,000 to $45,500. A bare shell is $27,000, and a finished insulated shop with a concrete floor is $52,500.
How the pole barn cost is calculated
A pole barn (post-frame building) stands on treated posts set in the ground, with trusses, purlins and steel or wood siding on top. The estimate has four parts:
- Building package. Hansen Buildings' 2026 starting prices for a basic package: 24 x 24 ft $6,900, 30 x 36 ft $11,000, 40 x 60 ft $21,100, 60 x 120 ft $59,600. The price per square foot falls with size, from $11.98 to $8.28, and the calculator interpolates between those four kits.
- Erection labor. $5 to $10 per sq ft (HomeAdvisor), $7 to $12 (Metal Building Outlet): typical $8.50.
- Permits. $425 to $2,300 (HomeAdvisor).
- Site prep and grading. $1,300 to $5,300 (HomeAdvisor's steel building page).
Cost = area × package price per sq ft + area × erection labor + permits + grading + the extras of the scope you pick
| Scope | What is added to the shell |
|---|---|
| Shell only | nothing |
| Ready to use | concrete pad $1,500 to $4,000, overhead and walk-in doors, electrical $1,000 to $3,000 |
| Finished shop | full concrete floor ($5 to $20 per sq ft) instead of the pad, insulation $900 to $1,900, windows $2,500 to $7,500 |
Overhead doors are $800 to $3,500 each and walk-in doors $200 to $1,000 (HomeAdvisor).
Worked example: 30 x 40 ft, ready to use
| Line | Typical |
|---|---|
| Site prep and grading | $3,300 |
| Package, 1,200 sq ft × $10 | $12,000 |
| Erection, 1,200 sq ft × $8.50 | $10,200 |
| Permits | $1,350 |
| Concrete pad | $2,750 |
| One overhead door | $2,150 |
| One walk-in door | $600 |
| Electrical | $2,000 |
| Total | $34,500 (range $23,000 to $45,500) |
Without the extras (shell only) the same barn is $27,000, right at HomeAdvisor's $27,000 average pole barn. As a finished shop with a slab, insulation and windows it is $52,500.
Cost by size
| Size | Area | Ready to use |
|---|---|---|
| 24 x 24 ft | 576 sq ft | $24,000 |
| 30 x 40 ft | 1,200 sq ft | $34,500 |
| 40 x 60 ft | 2,400 sq ft | $53,500 |
| 60 x 100 ft | 6,000 sq ft | $113,500 |
Small barns cost more per square foot because the doors, grading, permits and electrical are the same whatever the floor area.
Pole barn or metal building?
A pole barn sets its posts in the ground, while a steel building has a rigid frame that sits on a concrete slab, and the slab is a large part of the price difference. Price the same footprint in the metal building cost calculator to compare. If you plan to live in it, a finished steel or post-frame shell is priced in the barndominium cost calculator.
What raises the price
- Height and doors. Taller walls and large sliding or overhead doors raise the package price; Hansen's "starting at" prices are for basic buildings, so a plain shell leans low.
- Floor. A gravel or dirt floor is free; a 4 in slab is $5 to $20 per sq ft.
- Siding. Metal siding is $5 to $12 per sq ft and wood $3 to $10 (HomeAdvisor).
- Labor. Hiring the crew is $5 to $12 per sq ft; putting up the posts and trusses yourself removes most of that line.
Permits
Many counties exempt farm buildings from a building permit but still ask for a zoning and setback check. A barn with a plumbed shop, living space or a public use is a regular permit.
What to work out next
Size the concrete slab, the roofing and the insulation. If the barn will hold a garage, compare it with a garage addition. All estimates are in the project costs hub.
These are dated estimates from published national data adjusted for your state, not a quote.