Red Iron (PEMB) vs. Pole Barn Cost in Spokane County (2026): Price by Size, Snow Load and Foundations

Short answer: in Raven's market, an installed red-iron pre-engineered metal building (PEMB) and an installed pole building land in about the same place, roughly $60 to $75 per sq ft, not including electrical, plumbing or utility hookups, which are extra. So the real choice comes down to clear span, eave height, use and timeline, not a big price gap. In Spokane County, snow load and the foundation drive both systems.

Here's how the two compare, plus the local rules that shape either building.

What each building actually is

• Pole barn (post-frame): wood columns set in the ground or on concrete piers, wood trusses, and metal roofing and siding
• Red iron / PEMB: factory-engineered steel columns and rafters bolted to anchor bolts cast into a concrete foundation, with steel purlins, girts and panels

Cost per square foot in 2026

Raven's going rate for both systems, installed, is about $60 to $75 per sq ft. Electrical, plumbing and utility hookups are always extra.

• 30x40 (1,200 sq ft): about $72,000 to $90,000 installed
• 40x60 (2,400 sq ft): about $144,000 to $180,000 installed
• 40x80 (3,200 sq ft): about $192,000 to $240,000 installed
• Always extra: electrical, plumbing and utility hookups
• Varies by site: grading, gravel, driveway approach and how far the utilities have to run

Why online prices look so much lower

Most numbers you see online are kits or shells. HomeGuide's 2026 guides list pole barn kits at $10 to $30 per sq ft and metal building kits at $10 to $25 per sq ft, materials only. Those leave out freight, erection, the engineered foundation and the slab, and they're often priced for a lighter snow load than your parcel needs. Compare full installed quotes at the same size, door layout, snow load and slab spec.

Clear span and build time

Pole Barn Directory's 2026 comparison:

• Clear span: up to about 80 feet for standard post-frame engineering, versus 300+ feet for steel
• Build time: 2 to 6 weeks for a pole barn, 4 to 10 weeks for a steel building
• Foundation: embedded posts or piers for post-frame, a full concrete foundation for steel

If you need a 60-foot-wide shop with no posts in the middle, or a 100-foot equipment building, steel is usually the simpler engineering problem.

The Spokane County numbers that change the comparison

These come straight from Spokane County and the joint City/County frost-depth policy:

• Ground snow load: 39 psf base, with a 30 psf minimum roof snow load. Some parts of the county reach 150 psf, and your parcel's value is on the SCOUT map
• Frost depth: footings at least 24 inches below finished grade (18 inches for some detached residential accessory buildings)
• Permit exemption: only one-story detached accessory buildings up to 200 sq ft

Heavier snow means more truss or rafter capacity, so a kit priced for a light national load isn't the building you'll actually permit here. That hits both systems, and it's easier to compare like for like when every quote is engineered to the same parcel load. For the steel side, the snow load also drives the column reactions your concrete has to carry; our PEMB foundation guide explains anchor bolts and hairpins.

The foundation is where the budgets split

A pole barn can go up on posts and get a slab later, or never. A PEMB needs its engineered foundation before the steel shows up. That's why frame-only prices can make a pole barn look much cheaper. Once you add a floor and build both to the same loads, installed totals end up in the same range.

If you want a floor in either building, budget the concrete with our Spokane concrete cost per yard guide.

Other trade-offs

• Condensation: Pole Barn Directory rates condensation risk lower for wood frames and higher for all-steel frames, so a steel building needs a real insulation and vapor plan. See condensation control for steel buildings in Eastern Washington
• Maintenance: HomeGuide notes wood frames can be damaged by moisture, pests and fire, while metal frames are close to maintenance-free
• Permits: Pole Barn Directory rates steel buildings harder to permit because they need an engineered package. Either way, check our Spokane-area permit rules for shops and pole barns

Which one should you build?

• Choose a pole barn for an ag building, hay or equipment storage, or a shop where interior posts don't bother you and you may add the slab later
• Choose red iron for wide clear spans, tall eaves, big doors, commercial use, or anything over about 5,000 sq ft
• In between, get both priced at the same size, door layout, snow load and slab spec

Raven builds both. On steel, we aren't tied to one manufacturer, so we price your building with whichever supplier can deliver fastest at your parcel's loads. For a full line-item budget, see what a 30x40 or 40x60 metal shop with a slab really costs in Spokane County.

Get both options priced

Call 509-350-2016 or request a free quote and we'll price a pole building and a steel building for the same footprint. See our steel building and pole building services.

Sources

• Installed pricing: Raven Buildings' current going rate for the Spokane area
• HomeGuide, "How Much Does It Cost to Build a Pole Barn?" (2026)
• HomeGuide, "How Much Does a Metal Barn Cost?" (2026)
• Pole Barn Directory, Pole Barn vs Steel Building (2026)
• Spokane County Building FAQ (snow load)
• Spokane County BP-06 Residential Building Permits
• City of Spokane / Spokane County Joint Policy BUILD-07, Official Frost Depth
• Spokane County BP-25 Permit Exemptions