Deck Installation Cost in Washington
Estimated 2026 installed range: $6,400 – $15,400
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Open the calculatorCost by system type in Washington
| Option | Low | High |
|---|---|---|
| Pressure-treated wood | $6,400 | $15,400 |
| Composite | $12,800 | $28,200 |
| PVC / vinyl | $15,400 | $33,300 |
| Hardwood (ipe, mahogany) | $19,200 | $38,400 |
| Aluminum | $10,200 | $23,000 |
Local cost factors
Statewide drivers: West conditions and local labor rates. In Washington, wet soils and strict local health rules drive design costs.