How much does a concrete slab cost in Washington?
Poured concrete pad with forms, gravel base, and rebar. Using Washington material pricing, a typical DIY concrete slab runs about $671 in materials — 9% above the national average. These are estimates only, built from our live calculator's default project size — plug in your exact dimensions for a precise shopping list.
Estimates only — not a quote.
Washington cost breakdown
| Estimate | Low | Typical | High |
|---|---|---|---|
| Washington (DIY materials) | $570 | $671 | $906 |
| National average | $524 | $616 | $832 |
Washington material prices run about 9% above the national average based on our regional pricing index. Based on a common-size concrete slab — enter your own dimensions in the calculator for an exact number.
DIY materials estimate: $671. Hiring a contractor in Washington (materials + labor at ~$66/hr) estimates to $1,683–$2,257, roughly 16 labor hours. Estimated DIY savings: $1,241 (65%).
Get your exact Washington price
Enter your dimensions for a precise materials list and cost — an estimate tailored to your build, not a generic average.
Frequently asked questions
Materials alone typically run $570–$906 in Washington for a common-size project, based on current regional material pricing. This is an estimate, not a quote — use our free calculator for numbers matched to your exact dimensions.
DIY materials run about $671 versus an estimated contractor range of $1,683–$2,257 (materials plus labor at the regional rate of $66/hr). That's a potential estimated savings of $1,241 (65%) by doing it yourself.
Permit thresholds vary by project type and city. Check our Washington permit lookup and build guide for the state-level rules before you start.
See our concrete slab materials and cut list page for the canonical parts list, then run the calculator with your dimensions for an exact quantity and cost breakdown.