2026 local pricing guide for deck building in Seattle, WA with cost breakdowns and provider data.
Seattle, WA Average
$4,600 – $13,800
Most homeowners pay around $9,200
Low
$4,600
Typical
$9,200
High
$13,800
Based on national averages adjusted for WA cost of living (+15% vs. national average).
351
Licensed Providers in Seattle
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| Project Type | Low | Typical | High |
|---|---|---|---|
| Pressure-Treated Wood Deck | $4,600 | $8,050 | $12,650 |
| Composite Deck (Trex, TimberTech) | $9,200 | $17,250 | $28,750 |
| Cedar Deck | $6,900 | $11,500 | $18,400 |
| Deck Railing Addition | $1,150 | $2,875 | $5,750 |
| Deck Staining/Sealing | $575 | $1,150 | $2,300 |
| Deck Repair | $290 | $860 | $2,300 |
Prices adjusted for Seattle, WA cost of living. Actual costs may vary. Get multiple quotes for accurate pricing.
Deck Building in Seattle, WA typically costs $4,600 to $13,800, with most homeowners paying around $9,200. Costs vary based on project scope, materials, and the contractor you hire.
There are 351 verified deck building providers in Seattle, WA. We recommend getting quotes from at least 3 providers.
Pressure-treated wood decks cost $15 to $30 per square foot. Composite decks cost $25 to $50 per square foot. Cedar falls between at $20 to $40 per square foot.
A simple deck takes 1 to 2 weeks. A multi-level or complex deck with built-in features can take 3 to 4 weeks. Permit approval adds time to the overall timeline.
Almost always yes. Most jurisdictions require a building permit for new decks, especially if attached to the house or elevated above ground level.
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