Stamped Concrete Contractor in Spokane, WA

Stamped concrete contractor in Spokane, WA, pouring colored and textured patios, walkways and backyard spaces built for Spokane's severe freeze-thaw rating. Raven Buildings forms, pours, colors and stamps decorative concrete across Spokane and Spokane County with our own crew, using an air-entrained mix, a compacted base and planned control joints so the pattern lasts through winter, not just the first summer.

Stamped concrete work we do

• Patios: colored and stamped patios in stone, slate, brick and wood-plank style textures
• Walkways and steps: front walks, side-yard paths and landings that match the patio
• Fire pit and seating areas: a durable, continuous surface around outdoor living space
• Borders and accents: stamped bands around broom-finish slabs and driveways
• Replacement: tear-out and re-pour of cracked or scaling patios

Built for Spokane's climate

Spokane is a hard place for exterior concrete. The City's design criteria (SMC 17F.040.105) rate the area for severe weathering, with an air freezing index of 1,232, and NOAA's 1991–2020 normals for Spokane International Airport show about 33.7 days a year when the high never gets above freezing and 45.4 inches of normal annual snowfall. Here's how that shapes a stamped slab:

• Air-entrained mix: Washington's residential code (IRC Table R402.2) requires air-entrained concrete of at least 3,500 psi for porches and similar exterior slabs where weathering is severe, with 5 to 7 percent total air
• Tougher where deicers are used: ACI 332, the American Concrete Institute's residential concrete code, puts exterior concrete exposed to moisture and deicers in its most severe freeze-thaw class, at 4,500 psi at 28 days and a maximum water-cement ratio of 0.45
• Base and drainage: compacted gravel under the slab and a slope away from the house, so water doesn't sit and freeze under or on the patio
• Control joints: planned so cracks land in joints instead of across the pattern. See our control joint guide
• Frost depth: Spokane's official frost depth is 24 inches for footings. Patios don't need footings, but any post, wall or roof structure built with the patio does

Want help deciding? Our stamped concrete vs. pavers guide compares the two for Spokane winters, and our concrete psi guide explains mix strength.

Caring for stamped concrete

• No deicers the first winter: use clean sand for traction on new concrete
• Skip magnesium chloride and ammonium-based products: the concrete paver industry (CMHA) says magnesium chloride and CMA can chemically degrade concrete, and ammonium-based products should never be used on any concrete surface
• Reseal when it needs it: the ASCC Decorative Concrete Council says to reseal stamped concrete when water stops beading or the color fades. As a rule of thumb, high-traffic, sunny areas need it every two to three years and lighter-traffic areas every four to five
• Don't over-seal: the Council warns that resealing every year for a high gloss builds up on the surface and causes problems

More in our concrete sealing guide.

Permits

An uncovered patio poured at grade usually doesn't need a building permit:

• City of Spokane: the City's residential permit application lists concrete flatwork within property lines as exempt from a building permit
• Unincorporated Spokane County: the County's exemption list (BP-25) covers platforms, walks and driveways not more than 30 inches above adjacent grade, not over a basement and not part of an accessible route
• Still applies: setbacks, easements, critical areas and HOA rules. A roof over the patio is a structure and needs its own review

What stamped concrete costs

Raven's current patio pricing, including site prep and the pour:

• Stamped: about $18 to $30 per sq ft
• Broom finish: about $12 to $20 per sq ft
• What moves the price: the size of the patio and whether a pump truck is needed to reach the spot

Stamped walkways, borders and driveway work are quoted per project after we see the site. Our concrete patio cost guide has more detail.

Why Spokane homeowners call Raven

• Concrete is our core trade: our own crew forms, pours, colors and finishes. See our concrete flatwork services
• Local: we work across Spokane, Spokane Valley, Liberty Lake, Mead, Deer Park and the rest of Spokane County
• Straight answers: written quotes that say what's included

Get a stamped concrete quote

Send us your patio size, the pattern and colors you like and your address, and we'll quote it. Call 509-350-2016 or request a free quote. We also pour driveways and patios in Spokane Valley, Liberty Lake and Mead.

Sources

• Patio pricing: Raven Buildings' current rates for the Spokane area
• Spokane Municipal Code 17F.040.105, Design Criteria
• NOAA NCEI 1991–2020 Annual Normals, Spokane International Airport (freeze days and snowfall)
• Tennessee Concrete Association, ACI 332-20 Highlights (exterior concrete mix requirements)
• CMHA, The Effects of Deicing Chemicals on Interlocking Concrete Pavers
• ASCC Decorative Concrete Council, Sealing Stamped Concrete
• City of Spokane / Spokane County Joint Policy BUILD-07, Official Frost Depth
• City of Spokane General Residential Permit Application (exemptions)
• Spokane County BP-25 Permit Exemptions