Pole Barn Cost in Spokane (2026): Installed Price by Size, From 30x40 to 50x80

A pole barn in the Spokane area costs about $60 to $75 per sq ft installed with Raven Buildings, not counting electrical, plumbing or utility hookups, which are extra. That puts a 30x40 at roughly $72,000 to $90,000 and a 40x60 at roughly $144,000 to $180,000. Below are the common sizes, what moves the price inside that range, and the snow-load and permit rules that shape every pole building in Spokane County.

Pole barn cost by size

At Raven's installed rate of about $60 to $75 per sq ft:

• 24x30 (720 sq ft): about $43,200 to $54,000
• 30x40 (1,200 sq ft): about $72,000 to $90,000
• 30x50 (1,500 sq ft): about $90,000 to $112,500
• 40x60 (2,400 sq ft): about $144,000 to $180,000
• 50x80 (4,000 sq ft): about $240,000 to $300,000

These are installed numbers, not kit prices. Electrical, plumbing and utility hookups are not included in any of them.

What's extra, and what moves the price

• Always extra: electrical, plumbing and utility hookups, plus how far the power, water or septic has to run
• Site work: grading, gravel and a driveway approach vary from lot to lot
• Snow load: a parcel with a higher design snow load needs heavier trusses, posts and footings
• Doors and openings: large roll-up or sliding doors, walk doors and windows
• Size and span: buildings past the County's prescriptive limits need full engineering (see below)

If you're weighing post-frame against steel, installed red-iron buildings run about the same per square foot in our market. Our red iron vs. pole barn cost guide compares clear span, build time and foundations side by side.

Snow load sets the structure

Spokane County's base ground snow load is 39 psf with a 30 psf minimum roof snow load, but the County assigns snow loads parcel by parcel on its SCOUT map, and some areas run far higher. Nearby jurisdictions publish their own numbers:

• Unincorporated Spokane County: 39 psf base, parcel-specific from the SCOUT map, 24-inch frost depth
• City of Spokane Valley: 39 psf ground snow, 24-inch frost depth
• City of Airway Heights: 39 psf ground snow, 30 psf minimum roof, 24-inch frost depth
• City of Deer Park: 56 to 65 psf ground snow, 45 psf minimum roof for nonresidential buildings, 36-inch frost depth
• City of Liberty Lake: 58 psf ground snow, 40 psf minimum roof, 24-inch frost depth

Heavier snow means bigger trusses and deeper, wider post footings, so the same 30x40 can land at different points in the range depending on where it's built. Look up your parcel before you price a building, and be wary of any kit priced for a national average load.

Spokane County's prescriptive pole building limits

Spokane County's BP-32 handout gives a standard cross-section for residential and agricultural pole buildings, but only when:

• The truss span is 36 feet or less
• The building is 3,000 sq ft or less
• The ground snow load is 43 psf or less

A 40-foot clear span, a building over 3,000 sq ft, or a parcel above 43 psf needs engineered plans. That includes every lot in Deer Park and Liberty Lake at their published snow loads. We engineer to your parcel either way, so the permit set matches the building.

BP-32 also calls for a footing inspection before the post holes are backfilled and a final inspection before you use the building.

Permits

Nearly every pole barn needs a building permit. Spokane County's exemption list only covers one-story detached accessory structures of 200 sq ft or less, and setbacks and other land-use rules still apply to exempt buildings. Electrical permits come from Washington L&I. Our shop, pole barn and garage permit guide covers each Spokane-area building department.

Do you need a concrete floor?

Not always. Hay and equipment storage often stays on gravel. A shop, garage or anything with a car lift usually gets a slab, and Raven pours it with the same crew that builds the building. Read our shop slab thickness guide for 4 vs. 6 inches and lift loads.

FAQ

How much does a 30x40 pole barn cost in Spokane? About $72,000 to $90,000 installed at Raven's rate of $60 to $75 per sq ft. Electrical, plumbing and utility hookups are extra.

How much is a 40x60 pole building? About $144,000 to $180,000 installed, with electrical, plumbing and utility hookups extra.

Is a pole barn cheaper than a metal building? In our market, installed pole buildings and installed pre-engineered metal buildings cost about the same per square foot. The better choice comes down to span, use and site.

Can I use the County handout instead of engineering? Only for spans of 36 feet or less, buildings of 3,000 sq ft or less and snow loads of 43 psf or less.

Get a pole building quote

Call 509-350-2016 or request a free quote with your size, door layout and address, and we'll price it to your parcel's snow load. See our pole building services, Deer Park pole buildings and steel building services.

Sources

• Installed pricing: Raven Buildings' current going rate for the Spokane area
• Spokane County BP-32, Pole Buildings
• Spokane County BP-25, Permit Exemptions
• Spokane County Building FAQ (snow load)
• Spokane County SCOUT map
• City of Spokane Valley SVMC 24.40
• City of Airway Heights, Geographic Design Criteria
• City of Deer Park Municipal Code 15.04, Building Codes
• City of Liberty Lake, Construction Design Criteria
• City of Spokane / Spokane County Joint Policy BUILD-07, Official Frost Depth