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40×60 Barndominium Shell Cost in Washington (2026)
A 40×60 barndominium shell in Washington has a dried-in shell estimate of about $126,128 in 2026 ($52.55 per sq. ft.). Here's the itemized breakdown of materials, site prep and labor, using local crew rates.
Estimate only. Actual prices vary. No guarantee or warranty. Use as a guide only. Read the full disclaimer
Itemized cost breakdown
| # | Item | Quantity | Installed |
|---|---|---|---|
| 1 | Site grading & building padLaser-leveled pad 2 ft past the walls, compacted fill | 2,816 sq ft | $4,102 |
| 2 | 4" standard concrete slab + plumbing sleeves3,500 PSI ready-mix, #4 rebar 18" grid, vapor barrier, forms | 31.7 cu yd | $19,086 |
| 3 | 6×6 treated posts, girts & framing lumber26 posts × 18 ft (.60 CCA ground-contact), 2×6 girts, 2×8 treated skirt board | 26 posts + 1,600 lf | $23,395 |
| 4 | 40' engineered roof trusses & purlins31 trusses at 2 ft on center, 115 mph rated, 2×4 purlins | 31 trusses + 1,240 lf | $24,733 |
| 5 | 29-ga metal roof & wall panels + trimPainted steel panels, ridge cap, corner/door/base trim, closures | 56.3 squares | $14,460 |
| 6 | Doors & windowsDetails in the spec sheet | 🔒 Included in $19 spec sheet | $15,721 |
| 7 | Closed-cell spray foam (roof & walls)Details in the spec sheet | 🔒 Included in $19 spec sheet | $15,310 |
| 8 | Screws, hardware & condensation barrierDetails in the spec sheet | 🔒 Included in $19 spec sheet | $4,780 |
| 9 | Permit, stamped drawings & deliveryDetails in the spec sheet | 🔒 Included in $19 spec sheet | $4,541 |
| Dried-in shell estimate | $126,128 |
Prices use 2026 material costs and typical local crew rates. Site work, custom options and material price swings can move your final price.
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How much does a 40×60 Barndominium Shell cost in Washington?
About $126,128 for a dried-in shell (structure, roof, walls and doors), built by a local crew. Interior finish, utilities and site work are not included. Roughly $52,141 for the materials kit alone. Most fair bids land between $116,038 and $138,741.
What drives the price up or down?
Site prep (slope, soil, driveway access), floor choice, doors and insulation, and local labor rates. Lumber and steel prices also move a few percent a year.
Do I need a permit?
Most counties require a building permit for structures over 200 sq ft. Call your county building department with your size and location before you order materials.
How do I make sure I'm getting a fair quote?
Get at least 3 itemized bids for the same spec. Compare them line by line against this breakdown and ask about anything far above or below it.
Estimate only. Actual prices vary. No guarantee or warranty. Use as a guide only. Read the full disclaimer
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