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Western Building Supply
Post-frame commercial building with stone wainscot and a covered entry

40x80 Pole Barn Kit

A 40x80 pole barn kit is a working building: bays for trucks and trailers, a parts room, an office, and still room to pull equipment inside for winter repairs. It is a common size for contractor yards, fleet shops and farm headquarters.

Typical materials range$46K–$110K
Footprint
40′ × 80′
Floor area
3,200 sq ft
Typical eave
14–16 ft
Clear span
40 ft

What a 40x80 pole barn kit costs

Plan on $46K–$110K in materials for a 40x80 (3,200 sq ft). Industry shell-kit materials range for this footprint, from our pole barn cost guide. Labor, concrete and site work are separate.

Your exact number depends on the choices on the right. Send us the size, use and build-site zip code and we will send back an engineered price for your site — usually the same business day.

Full cost guide →

What moves the price

  • Eave heightTaller walls mean longer columns, more steel and bigger doors.
  • Doors and windowsCount and size of overhead doors is often the biggest single swing.
  • Snow and wind loadsHigh-snow and high-wind counties need heavier trusses and tighter spacing.
  • Steel and finishesWoodgrain or textured steel, stone wainscot and pre-finished siding.
  • Porches and lean-tosCovered space on a sidewall adds cost, but far less than more building.
  • Insulation and linerInterior liner panels and insulation packages for heated space.

What people build with a 40x80

  • Commercial or contractor shop
  • Fleet and trailer parking
  • Large equipment and machinery storage
  • Farm shop with office

Typical doors: Four or more overhead doors, drive-through optional, plus walk doors

Sizing notes from the field

  1. Place overhead doors on both sidewalls for drive-through bays.
  2. A 16 ft eave clears 14 ft doors for trucks, trailers and taller equipment.
  3. Frame a 40x16 office and parts room at one end with a mezzanine above for storage.
  4. Longer buildings need careful door and window placement for wind bracing — we engineer it for your site.
Western Building Supply flatbed loaded with a post-frame building package on a mountain highway

What ships in a 40x80 kit.

  • Engineered trussesCustom spans up to 86′ in one piece, designed for your site’s snow and wind loads and built in Wheatland.
  • Laminated columnsStraighter than solid posts, with better treatment penetration where the column meets the ground.
  • Steel roofing & siding35+ colors, including textured finishes and a woodgrain, backed by a 40-year paint warranty.
  • Trim & flashingRidge cap, corner trim, J-channel and drip edge, color-matched to your steel.
  • Fasteners & hardwareEvery screw, bolt, bracket and closure strip the build calls for — counted, not guessed.
  • Stamped engineeringSite-specific drawings for your county’s loads, ready to hand to the building department.
  • Delivered on our trucksOur flatbeds, our drivers, with an onboard forklift to set materials where your crew wants them.

Not included: concrete, site work, labor, insulation and interior finish. We’ll tell you exactly where the package stops before you order.

See every component →

40x80 kit questions.

How much does a 40x80 pole barn kit cost?

Industry-wide, shell-kit materials for a 40x80x14 typically run $46,000 to $110,000, depending on eave height, doors, insulation, finish and engineering for your site.

Is post-frame a good choice for a commercial shop?

Yes. Post-frame dries in quickly, spans wide open floors without interior posts, and costs less than most conventional commercial construction. Check local code requirements for your intended use.

Can I add an office inside a 40x80?

Yes. Many owners frame an office, restroom and parts room at one end and use the space above as a storage mezzanine.

What is included in a 40x80 kit from Western?

Engineered trusses, laminated columns, steel roofing and siding, trim and flashing, fasteners and hardware, framing for doors and windows, and stamped engineering drawings for your site. Concrete, labor, insulation and interior finish are not included.

Do you deliver to my area?

We deliver on our own trucks to Wyoming, Colorado, Montana, South Dakota, Nebraska, Kansas, Idaho, Utah, New Mexico, Texas and Nevada.

Western Building Supply truck hauling a post-frame building package down the highway

Price your 40x80.

Tell us the use, eave height you have in mind and your build-site zip code. We will engineer it for your site and send back a price.

Mon–Thu 7am–5pm, Fri 8am–3:30pm MT

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