Shop Slabs & Concrete Foundations in Mead & Colbert, WA

The slab is the part of your shop you can't redo. Raven Buildings pours shop slabs, footings, stem walls and foundations in Mead, Colbert and the rest of north Spokane County. Each one is built to the County's design numbers and to the exact building that will sit on it.

Call 509-350-2016 or request a free quote.

What we pour in Mead and Colbert

• Shop and garage slabs for steel buildings, pole buildings and stick-framed shops, with thickened edges, vapor barrier, reinforcement and saw-cut control joints
• PEMB foundations with column footings and anchor bolts set by template to the manufacturer's plan
• House and addition foundations. Footings and stem walls.
• RV pads, equipment pads and aprons
• Driveways, walks and patios

See all concrete flatwork services.

The design numbers for Mead and Colbert

Mead and Colbert aren't incorporated cities, so building permits go through Spokane County Building & Planning, 1026 W Broadway, Spokane (509-477-3675) (1). The County's criteria shape your footings and slab:

• Ground snow load: 39 psf base, 30 psf roof minimum. Parcel-specific. Some county areas reach 150 psf (check the SCOUT snow-load layer) (1, 2).
• Frost depth: 24 inches below finished grade. Detached residential accessory buildings may use 18 inches, and frost-protected shallow foundations are allowed (3).
• Wind: 110 mph (4)
• Permit exemption: One-story detached accessory structures up to 200 sq ft (BP-25) (5)

Why the snow load matters for concrete: snow on the roof turns into column loads and outward thrust at the base of a steel frame. Those forces go straight into your footings and slab. Before we price a north-county slab, we look up your parcel's snow load, because a building priced at 39 psf on a lot that needs more means bigger footings later.

Pole building or steel building on top?

• Pole buildings: Spokane County's prescriptive BP-32 path covers buildings up to a 36-ft truss span, 3,000 sq ft and 43 psf ground snow. The County inspects the post holes before backfill (6). We can pour the slab after the posts are set. See pole buildings.
• Pre-engineered steel (PEMB): the manufacturer provides the anchor-bolt plan and column reactions, and the foundation is engineered to them. Because we're manufacturer-neutral and source from whichever supplier can deliver fastest, we coordinate the foundation with that supplier's package. See steel buildings.

What a shop slab costs (published 2026 ranges)

• 4" slab, installed: Published range: $6–$8 per sq ft; Source: HomeGuide (7)

• 6" slab, installed: Published range: $8–$10 per sq ft; Source: HomeGuide (7)

• Ready-mix concrete: Published range: $119–$147 per cubic yard (within 20 miles); Source: HomeGuide (8)

• Concrete volume: Published range: about 1.23 yd³ per 100 sq ft at 4", 1.85 at 6"; Source: MyConcreteCalc (9)

• 30x40 (1,200 sq ft): 4" slab ($6–$8/sq ft): $7,200–$9,600; 6" slab ($8–$10/sq ft): $9,600–$12,000

• 40x60 (2,400 sq ft): 4" slab ($6–$8/sq ft): $14,400–$19,200; 6" slab ($8–$10/sq ft): $19,200–$24,000

Sizes multiplied by HomeGuide's ranges. Rural Mead and Colbert lots often add clearing, gravel access, grading and longer concrete-truck hauls. We price those up front. For the whole building budget, see our metal shop with slab cost breakdown.

Getting it right before the pour

1. Look up the parcel's snow load and confirm the building design matches.
2. Get the anchor-bolt plan (for steel) or post layout (for pole) before we form.
3. Set under-slab plumbing, floor drains, trench drains and conduit sleeves.
4. Compact the base and place the vapor barrier.
5. Place reinforcement and thickened edges, and set the bolts by template.
6. Pass the footing inspection before the concrete goes in.
7. Saw-cut control joints the same day or the next, then cure.

FAQ

Who issues permits in Mead and Colbert? Spokane County Building & Planning, since both are unincorporated (1). Planning a pole building? See pole buildings.

How deep do footings go in north Spokane County? 24 inches below finished grade, or 18 inches for some detached residential accessory buildings (3).

How thick should a shop slab be? 4 inches is common for light use. Many shops go to 6 inches or thicker for trucks, lifts and equipment. Your building's column loads and thickened-edge design come from the engineered foundation.

How much is a 30x40 shop slab? At HomeGuide's 2026 ranges, about $7,200–$9,600 at 4 inches or $9,600–$12,000 at 6 inches, before site work (7).

Get a slab quote

Call 509-350-2016 or request a quote. Send us your address, building size and what's going on top.

Sources

1. Spokane County Building FAQ
2. Spokane County SCOUT map, Snow Loads layer
3. City of Spokane / Spokane County Joint Policy BUILD-07 Frost Depth
4. Spokane County BP-06 Residential Building Permits
5. Spokane County BP-25 Permit Exemptions
6. Spokane County BP-32 Pole Buildings
7. HomeGuide, "How Much Does a Concrete Slab Cost? (2026)"
8. HomeGuide, "How Much Does Concrete Cost Per Yard? (2026)"
9. MyConcreteCalc, "Concrete Slab Cost 2026"