Wood Deck Cost in Washington
Wood Deck in Washington costs $23–$89 per sq ft in 2026. A typical 300 sq ft project averages $15,600. Washington is in the West region, where labor and materials run on the higher end of national pricing.
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How much does a wood deck cost in Washington? A wood deck in Washington costs $6,900–$26,700 in 2026, with most homeowners paying around $15,600 for a typical 300 sq ft project.
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Pre-set to wood deck in Washington — enter your project size for a localized range.
How big is your Wood Deck?
A 10×10 deck is 100 sq ft. A 16×20 deck is 320 sq ft.
- Per sq ft
- $23–$89
- Typical range
- $6,900–$26,700
- Average
- $15,600
- Labor share
- 58%
Washington Average Cost (2026)
Cost Breakdown
Based on a 300 sq ft project in the West region. Actual costs vary by contractor, site conditions, and material choices.
Wood Deck Cost by Material in Washington
Installed price per sq ft in Washington, materials and labor combined.
| Material | Low | High |
|---|---|---|
| Pressure-Treated Wood | $22/sq ft | $33/sq ft |
| Composite | $53/sq ft | $69/sq ft |
Estimated from Washington's overall wood deck pricing model; actual cost depends on brand, grade, and installation complexity.
Wood Deck Cost by Size in Washington
150 sq ft, 300 sq ft, and 600 sq ft wood deck cost in Washington — the most common sizes (2026).
| Project size | Low | Mid | High |
|---|---|---|---|
| 150 sq ft | $3,450 | $7,800 | $13,350 |
| 300 sq ft | $6,900 | $15,600 | $26,700 |
| 600 sq ft | $13,800 | $31,200 | $53,400 |
Based on $23–$89 per sq ft in the West region. A 10×10 deck is 100 sq ft. A 16×20 deck is 320 sq ft.
Building a Wood Deck in Washington: Local Factors
What makes wood deck projects in Washington different from the national baseline.
Permits & codes
Washington State has a statewide building code (adopted and amended by the Washington State Building Code Council). Seattle deck permits are among the most expensive in the country, running $800–$2,500 depending on size and scope, with plan review through the Seattle DCI (Department of Construction & Inspections) taking 3–8 weeks. Hillside lots — extremely common in Seattle neighborhoods — may require a geotechnical report if the slope exceeds local thresholds. Suburban cities (Bellevue, Kirkland, Redmond, Tacoma) have similar requirements with somewhat lower fees and faster turnaround.
Climate & foundations
Seattle's wet climate (38+ inches of rain per year) makes rot resistance and moisture management the dominant material considerations. Cedar — a locally native species with natural rot resistance — is the traditional PNW decking material and remains popular. Composite and PVC decking have grown significantly in market share for their lower maintenance requirements and better moss resistance; moss and algae growth on horizontal wood surfaces is a real maintenance burden in Seattle's climate. Ledger flashing and joist drainage must be specified carefully to prevent rot at the home attachment point.
Market & timing
Seattle deck costs run 25–35% above the national average, driven by high labor rates ($85–$95/hour), expensive permits, and the frequency of hillside lots that require engineered post systems or cantilevered framing. Cedar and composite are both mainstream — get bids on both materials and compare 10-year maintenance cost, not just upfront price. Fall and winter are the wettest months and least ideal for finishing; spring and summer are peak booking seasons.
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Return on Investment
How much value does a wood deck add to your home at resale?
How Wood Deck compares to other projects
ROI figures based on Remodeling Magazine Cost vs. Value Report 2024, national averages. Actual resale value depends on your market, home price tier, and project quality.
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Frequently Asked Questions
How much does a wood deck cost in Washington?
In Washington, a typical 300 sq ft wood deck project costs between $6,900 and $26,700, with a mid-range average of $15,600. Washington is in the West region.
How much is labor for a wood deck in Washington?
Labor accounts for approximately $9,048 of the total cost for a 300 sq ft wood deck project in Washington. The West Coast and Mountain West have some of the highest labor costs in the country, driven by high cost of living and strong contractor demand.
Do I need a permit to build a wood deck in Washington?
Washington State has a statewide building code (adopted and amended by the Washington State Building Code Council). Seattle deck permits are among the most expensive in the country, running $800–$2,500 depending on size and scope, with plan review through the Seattle DCI (Department of Construction & Inspections) taking 3–8 weeks. Hillside lots — extremely common in Seattle neighborhoods — may require a geotechnical report if the slope exceeds local thresholds. Suburban cities (Bellevue, Kirkland, Redmond, Tacoma) have similar requirements with somewhat lower fees and faster turnaround.
Which wood deck material costs the least in Washington?
Pressure-Treated Wood is typically the least expensive option in Washington, running $22–$33 per sq ft installed. Composite runs the highest, at $53–$69 per sq ft.
How do I find a contractor for a wood deck in Washington?
Get at least 3 quotes from licensed local contractors, verify their license with Washington's contractor licensing board, and check reviews on Google or the BBB. Use our free estimate tool to understand fair pricing before you negotiate.
Does a wood deck add value to your home in Washington?
On average, a wood deck recoups about 95% of its cost at resale nationwide. For a $15,600 project in Washington, that's approximately $14,820 in added home value. Actual ROI varies by neighborhood and market conditions.
Wood Deck Cost by Washington City
Local pricing, permit notes, and climate factors for major Washington metros.
Wood Deck Calculators
Estimate exact costs and material quantities for your wood deck project.
Other Home Improvement Costs in Washington
Wood Deck Cost in Nearby States
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How big is your Wood Deck?
A 10×10 deck is 100 sq ft. A 16×20 deck is 320 sq ft.
Pro Tips
- Get at least 3 contractor quotes
- Ask about permit requirements
- Budget 10–20% contingency
- Check contractor licenses
Wood Deck Cost by State
See the Full Picture
Curious how Washington compares across every project type, not just wood deck?
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