Washington State · NRMCA 2026 · Updated June 2026
Concrete Prices in Washington State — 2026 Cost Guide + Calculator
Ready-mix concrete in Washington costs $130–$178 per cubic yard in 2026 — above the national average due to strong union labor, Washington's B&O business tax, and no in-state cement manufacturing. Seattle metro is the most expensive market; Spokane and Eastern Washington are significantly cheaper.
Quick Answer
How Much Does Concrete Cost in Washington State?
Ready-mix concrete averages $148/yd³ statewide in 2026. The $140–$200 range cited by AI tools reflects the genuine gap between Eastern Washington ($130–$140) and Seattle metro ($162–$178). Washington is one of the few states where the B&O business tax is explicitly passed through to concrete customers — adding $4–$6/yd³ that no other state charges.
Free Tool — Washington Pricing
Washington State Concrete Cost Calculator
Pre-loaded with Washington 2026 regional pricing. Select your city for the most accurate local estimate.
Material: NRMCA 2026 Washington data. Includes B&O tax pass-through. Installed: RS Means Washington labor rates. Rain curing ($0.20–$0.40/sq ft) not included. Always get 3 local quotes.
Seattle vs Spokane — and Everything Between
Concrete Prices in Washington — City by City
Washington has a 37% price spread from Eastern WA ($130) to remote Olympic Peninsula ($178) — the widest gap is the Cascade Mountains, which divides two completely different labor markets.
| City / Region | Low | Average | High | Key factors |
|---|---|---|---|---|
| Spokane / Eastern WA Spokane, Spokane Valley, Cheney | $125 | $130 | $148 | Non-union market; lower labor; eastern side of Cascades = different economy |
| Tri-Cities Richland, Kennewick, Pasco | $128 | $135 | $152 | Energy sector demand (Hanford); growing market; moderate union presence |
| Yakima / Central WA | $132 | $140 | $158 | Agricultural economy; I-82 corridor; between eastern and western markets |
| Olympia / South Sound | $138 | $145 | $165 | State government demand; west side labor rates; moderate competition |
| Tacoma / Pierce County | $142 | $152 | $172 | Port of Tacoma logistics; military base demand (JBLM); union wages |
| Bellevue / Eastside | $148 | $158 | $182 | Tech-economy labor premium; high demand from Amazon/Microsoft campus construction |
| Seattle metro Seattle, Renton, Kent, Redmond | $155 | $165 | $190 | Highest WA market; strongest union wages; dense traffic; permit overhead |
| Bellingham / NW WA | $162 | $172 | $195 | BC Canada border; some materials from Canada; isolated market |
| Olympic Peninsula / remote WA | $165 | $178 | $210 | Ferry and bridge logistics; no local plants; all material trucked from Seattle area |
Source: NRMCA 2026 · RS Means Washington metro data · Green Dot Concrete Seattle published rates. B&O tax pass-through included in all prices.
Project Reference
Washington State Concrete Cost by Project — 2026
Using Washington statewide average of $148/yd³. Installed costs use RS Means Washington labor rates.
| Project | Dimensions | Thickness | Yd³ | Material (WA avg) | Installed (WA) |
|---|---|---|---|---|---|
| Small patio | 10×10 ft | 4" | 1.4 | $185–$221 | $600–$1,600 |
| 10×20 slab | 10×20 ft | 4" | 2.7 | $338–$404 | $1,200–$3,200 |
| 20×20 slab | 20×20 ft | 4" | 5.5 | $688–$823 | $2,400–$6,400 |
| Single driveway | 40×12 ft | 6" | 9.8 | $1,228–$1,468 | $4,320–$9,600 |
| 2-car garage floor | 24×24 ft | 4" | 8.7 | $1,089–$1,302 | $3,456–$8,640 |
| 30×30 slab | 30×30 ft | 6" | 18.5 | $2,315–$2,768 | $7,290–$18,000 |
| 40×60 barn / shop | 40×60 ft | 6" | 49.3 | $6,170–$7,377 | $17,280–$38,400 |
Seattle and Bellevue projects add 10–15% to installed costs. Olympic Peninsula adds 20–30% for ferry/bridge logistics. Rain curing ($0.20–$0.40/sq ft) applies to most west-side projects.
Washington-Specific Factors
Why Concrete Costs More in Washington — and Why Eastern WA Is Different
Washington B&O Tax — passed to customers
Washington has no income tax but charges a Business & Occupation (B&O) tax on gross revenue. Ready-mix suppliers pass this through as a line item or built into pricing — adding approximately $4–$6/yd³ vs equivalent operations in Oregon or Idaho. This is a structural cost, not a markup.
Rain and curing — the west-side reality
Western Washington averages 150+ rainy days per year. Rain on fresh concrete within 2 hours of placement can wash out the cement paste and significantly weaken the surface. Contractors use polyethylene sheeting and curing compounds ($0.20–$0.40/sq ft) as standard practice west of the Cascades — a cost not needed in Eastern WA or most other states.
Seattle union labor premium
Seattle ready-mix drivers and concrete laborers are among the highest-paid in the US. Teamsters Local 174 covers most Seattle-area ready-mix drivers; laborers fall under LIUNA Local 242. Combined, union wages add $18–$25/yd³ to Seattle labor costs vs Spokane's non-union market — the single largest driver of the east-west price gap.
The Cascade divide — two different markets
The Cascade Mountains split Washington into two economic zones. Eastern WA (Spokane, Tri-Cities, Yakima) functions like a Midwest market — non-union, competitive, and $130–$140/yd³. Western WA (Seattle, Tacoma, Olympia) functions like a coastal market — union, high demand, $145–$178/yd³. If your project is near the pass, always get quotes from both sides.
Common Question
How Many Square Feet in a Yard of Concrete at 4 Inches Thick?
One cubic yard of concrete at 4 inches thick covers exactly 81 square feet. The formula: 27 ft³ per cubic yard ÷ 0.333 ft (4 inches) = 81 sq ft.
This is one of the most useful numbers in concrete estimation — it lets you quickly sanity-check any quote. If a contractor says you need 10 yards for a 700 sq ft patio at 4 inches, that's 700 ÷ 81 = 8.6 yards before overage, or 9.5 yards with 10% buffer. 10 yards is reasonable. If they say 15 yards for the same project, ask for the calculation.
| Thickness | Sq ft per yd³ | Washington cost per sq ft (material) |
|---|---|---|
| 3.5" | 92.6 sq ft | $1.60/sq ft |
| 4" | 81 sq ft | $1.83/sq ft |
| 5" | 64.8 sq ft | $2.28/sq ft |
| 6" | 54 sq ft | $2.74/sq ft |
| 8" | 40.5 sq ft | $3.65/sq ft |
Pro Tips — Washington Market
How to Get the Best Concrete Price in Washington State
Common Questions
Concrete Prices in Washington State — FAQ
Ready-mix concrete in Washington state costs $130–$178 per cubic yard in 2026, with a statewide average of $148/yd³. Eastern Washington (Spokane) averages $130/yd³; Seattle metro averages $165/yd³; the Olympic Peninsula can reach $178+/yd³. Prices include Washington's B&O business tax pass-through of approximately $4–$6/yd³.
A 20×20 ft slab at 4 inches thick in Washington requires about 5.5 cubic yards. Material cost runs $688–$823. Installed cost runs $2,400–$6,400 — Eastern Washington (Spokane) at the low end, Seattle and Bellevue at the high end. Add $0.20–$0.40/sq ft for rain curing compounds on west-side projects.
A 40×60 ft slab at 6 inches thick in Washington requires about 49 cubic yards. Material cost runs $6,170–$7,377. Installed cost runs $17,280–$38,400 — Spokane at the low end, Seattle and Tacoma at the high end. Olympic Peninsula projects add 20–30% for logistics.
One cubic yard of concrete at 4 inches thick covers exactly 81 square feet. Formula: 27 ft³ ÷ 0.333 ft (4 inches) = 81 sq ft. At 6 inches it covers 54 sq ft; at 3.5 inches it covers 92.6 sq ft. Use this to verify contractor estimates — divide your total square footage by 81 (for 4") to get the baseline yards needed before adding 10% overage.
ASTM C94 requires concrete discharge within 90 minutes of water contact. In Seattle's dense traffic, a plant in SoDo serving a project in Bellevue via I-90 can easily hit 45–60 minutes in transit — leaving limited working time. Schedule Seattle and Bellevue pours for early morning (before 7am) to avoid I-405 and I-90 congestion. Spokane and Eastern WA have far fewer traffic issues.
Washington city-level pricing from NRMCA 2026 and RS Means cost multipliers for Seattle, Tacoma, Spokane, and Tri-Cities markets. Green Dot Concrete Seattle published rates cross-referenced with NRMCA data. B&O tax impact from Washington DOR construction services guidance. Rain curing protocol from ACI 308R. Teamsters Local 174 and LIUNA Local 242 wage data from BLS union wage surveys. Updated June 2026.