28×40 Pole Barn Cost (2026): Workshop & Barndominium Pricing

The 28x40 is one of the most popular pole barn sizes for workshops, hobby shops, and small barndominiums. At 1,120 square feet, it splits the difference between the entry-level 24x40 and the workhorse 30x40 — giving you a roomier interior than a 24-foot-wide building without paying the premium for a full 30 feet of width. The extra 4 feet of width over a 24x40 makes a real difference for trucks, equipment, and workshop layouts where 24 feet feels cramped.

In 2026, a 28x40 pole barn costs between $8,000 and $45,000 depending on configuration and finish level.

28×40 Pole Barn Price Overview

Configuration	Price Range
Kit only (materials)	$8,000–$15,000
Kit + hired erection crew	$14,000–$22,000
Contractor-built (shell only)	$16,000–$25,000
With concrete slab	$22,000–$34,000
With slab + electrical + insulation	$28,000–$40,000
Fully finished interior / barndominium	$40,000–$95,000

Per-Square-Foot Costs

Build Level	28×40 Cost/Sq Ft	30×40 for Comparison
Kit only	$7–$13	$8–$14
Shell (contractor)	$14–$22	$15–$25
Shell + slab	$20–$30	$22–$32
Finished	$28–$40	$28–$40

The per-square-foot cost for a 28x40 sits right between the 24x40 and 30x40, with a slight efficiency advantage over the 24x40 because the trusses span more economically at 28 feet than at 24 feet.

Kit Pricing for a 28×40

A 28x40 kit runs $8,000 to $15,000 from most national manufacturers. Included:

• 8–10 treated laminated columns (8’ on center)
• Pre-engineered trusses (28’ clear span) at 4’ on center
• Purlins, girts, and framing hardware
• 29-gauge steel roof and wall panels
• Trim, flashing, and fasteners
• One overhead door frame opening (typically 10×10 or 12×10)
• One walk-in door frame opening

A 28-foot truss span is at the edge of what a two-person crew can handle by hand. Most builders use a small crane or boom truck to set 28-foot trusses, which adds a half-day of equipment rental ($500–$800) but speeds the install dramatically.

28×40 vs 30×40 — The Key Comparison

This is the comparison most pole barn buyers face. The 30x40 has dominated as the “default” size for years, but the 28x40 deserves consideration:

Factor	28×40	30×40
Square footage	1,120 sf	1,200 sf
Kit cost	$8K–$15K	$9K–$16K
Contractor shell	$16K–$25K	$17K–$27K
Truss span economy	Excellent (28’ is sweet spot)	Good (30’ adds ~5–8% truss cost)
Interior layout flexibility	Comfortable	Slightly more flexible
Resale appeal	Solid (popular workshop size)	Slightly higher (rounder number)

Bottom line: The 28x40 saves $1,000–$2,000 over the 30x40 with only a 7% reduction in floor space. For workshops and storage where the extra 80 sf isn’t critical, the 28x40 is the better economic choice. For barndominiums where every square foot of living space matters, lean toward the 30x40.

Common Uses for a 28×40

• Workshop / hobby shop: 1,120 sf is a comfortable size for woodworking, auto restoration, or a dedicated hobby space. Plenty of room for a workbench wall, dust collection, and project area without feeling cramped.
• 3-bay garage: Three 10x8 overhead doors fit comfortably along the 40-foot wall. Room for three vehicles plus storage.
• Small barndominium: Open-concept living with bedroom, bath, kitchen, and great room in 1,120 sf. Tight but viable for couples or singles.
• Equipment storage: Tractor, mower, ATV, trailer, and seasonal storage. Single 12x10 overhead door provides easy drive-through access.
• Horse barn: 4 stalls along the 40-foot side with a 12-foot center aisle leaves room for tack and feed storage at one end.

Concrete Slab Options for 28×40

A 28x40 slab (1,120 sf) costs $5,500–$10,000 depending on spec:

Slab Type	Cost	Best For
4” slab, wire mesh	$5,500–$7,500	Light vehicles, storage, hobby use
6” slab, rebar reinforced	$7,500–$10,000	Trucks, equipment, workshops
6” slab + radiant tubing	$9,000–$13,500	Heated barndominium / shop

If you plan to heat the building, run radiant tubing in the slab during the pour — it’s $1,500–$3,500 extra at install time vs $8,000+ to retrofit later.

How to Maximize a 28×40

• 12-foot eaves. Standard 10’ eaves are fine for vehicles but tight for storage attics or RV/boat parking. Bumping to 12’ adds $700–$1,500 and dramatically expands what you can store overhead. For a 14-foot eave (full RV clearance), budget $1,200–$2,200 extra.
• End-wall door, not side-wall. For workshops, putting the overhead door on the 28-foot end wall (instead of the 40-foot side) keeps the long walls free for tool storage, workbenches, and shelving. You give up nothing on access since 28 feet is plenty wide for most equipment.
• 40-foot trusses with no center post. A 28-foot clear span is short enough that you don’t need any interior support posts — leaving a true open-floor-plan space. Don’t let a builder talk you into adding a center post unless they show you the engineering reason.
• Insulate the ceiling first. If budget forces choices, ceiling insulation gives the biggest comfort improvement. R-30 blown-in fiberglass for a 1,120 sf ceiling: $1,200–$1,800 DIY or $2,500–$3,500 installed.

Find Builders for a 28×40 Pole Barn

The 28x40 is a sweet-spot size — large enough that most pole barn contractors will quote it without surcharges, small enough to fit a typical 2–3 day shell-build window. Browse pole barn contractors near you or request free quotes.

Frequently Asked Questions

How much does a 28x40 pole barn cost?

A contractor-built 28x40 shell costs $16,000–$25,000 in 2026. With concrete slab: $22,000–$34,000. Fully finished: $40,000+ (and up to $95K for a barndominium with full residential interior). A kit alone runs $8,000–$15,000.

Is a 28x40 big enough for a barndominium?

Yes, but it’s tight — 1,120 sf is small-house territory. Best suited for couples, singles, or vacation/secondary homes. For a primary residence with multiple bedrooms, step up to a 30x40 (1,200 sf), 30x60 (1,800 sf), or 40x60 (2,400 sf).

Can I DIY a 28x40 pole barn?

The 28x40 is at the upper end of practical DIY. The 28-foot trusses are heavier than a 24-foot span — usually requires a crane or 4+ person crew to set safely. Total material cost: $8,000–$15,000 for the kit. Plan 4–6 weekends with two experienced people, or 2–3 weekends with a crane and a 4-person crew.

What’s the difference between a 28x40 and a 30x40?

The 30x40 is 80 sf larger (1,200 vs 1,120), costs $1,000–$2,000 more for the shell, and has a slightly more popular resale-value reputation. The 28x40 is more economical because 28 feet is a more common truss span in lumber-yard inventory. For most uses, the 80 sf difference is invisible.

Do I need a permit for a 28x40 pole barn?

Yes, almost always. At 1,120 sf, a 28x40 exceeds the “no permit needed” threshold in nearly every jurisdiction (typically 100–200 sf). Permit cost: $200–$2,000 depending on location and engineered drawing requirements. See our pole barn permit guide for state-by-state details.

Related Guides

• 30×40 Pole Barn Cost — the next size up
• 24×40 Pole Barn Cost — the next size down
• Barndominium Cost — adding a residential interior
• Pole Barn Cost Per Square Foot — compare any size
• Pole Barn Kit vs Custom Built — DIY savings breakdown