Wood deck cost in Washington
Statewide estimate from BLS wages and BEA prices. Reviewed Nov 4, 2026.
- Statewide range (300 sq ft)
- $8,500 – $17,000
- Per sq ft
- $28 – $56
- before permit
- Versus US midpoint
- +12%
- US $11,400
- Metros covered
- 7
Washington prices for wood deck: $8,500 to $17,000 for 300 sq ft, or $28 to $56 per sq ft without the permit. The state midpoint is 12% above the national one. Local wages for carpenters are $35.67 an hour.
Inside Washington, the metros we cover range from $11,800 (Spokane) to $12,900 (Seattle) at the midpoint. Pick your closest city in the table for a tighter number.
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Estimated cost for 300 sq ft in Washington (statewide), standard level
$11,000 to $14,500
About $36.50 to $47.50 per sq ft before permits. Labor is about 48% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $5,700 | $7,450 |
| Labor | $5,250 | $6,850 |
| Permits and fees | $85 | $130 |
| Total | $11,000 | $14,500 |
Cost breakdown for 300 sq ft in Washington
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $4,400 | $6,550 | $8,750 | 52% |
| Labor | $4,050 | $6,050 | $8,100 | 48% |
| Permits and fees | $55 | $110 | $160 | 1% |
| Total | $8,500 | $12,700 | $17,000 | 100% |
Which Washington city is cheapest for wood deck?
1 of the 7 metros sit above the statewide midpoint of $12,700, and the top-to-bottom gap is 9%. Each row prices the default size with that metro's own BLS wages and BEA price levels, so the gap between rows is real local variation rather than a flat markup.
| Metro | Range (300 sq ft) | Midpoint | vs. state |
|---|---|---|---|
| Seattle, WA | $8,600 – $17,200 | $12,900 | +1% |
| Bellingham, WA | $8,450 – $17,000 | $12,700 | level |
| Bremerton, WA | $8,050 – $16,200 | $12,100 | −5% |
| Kennewick, WA | $8,050 – $16,100 | $12,100 | −5% |
| Olympia, WA | $7,950 – $16,000 | $12,000 | −6% |
| Yakima, WA | $7,900 – $15,900 | $11,900 | −7% |
| Spokane, WA | $7,850 – $15,800 | $11,800 | −7% |
Washington against its neighbors
Washington ranks 6 of 51 (the 50 states plus DC) for wood deck, where 1 is the most expensive. The costliest is Hawaii at $14,300 and the cheapest Oklahoma at $9,900, both for 300 sq ft at the midpoint. Washington sits at $12,700. The five states closest by workforce center are listed below.
| State | Distance | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Oregon | 170 miles away | $7,950 – $15,900 | $11,900 | −7% |
| Idaho | 380 miles away | $7,000 – $14,100 | $10,500 | −17% |
| Montana | 500 miles away | $7,350 – $14,700 | $11,000 | −13% |
| Utah | 650 miles away | $7,050 – $14,100 | $10,600 | −17% |
| Nevada | 780 miles away | $7,500 – $15,000 | $11,300 | −12% |
Related projects, priced for Washington
The table prices neighboring jobs at their usual sizes using statewide Washington wages and prices. Against national midpoints, concrete patio comes out highest (+18%) and detached garage lowest (+15%), because each job leans on different trades.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Composite deck | 300 sq ft | $13,900 – $27,800 | +15% |
| Concrete patio | 300 sq ft | $1,400 – $4,800 | +18% |
| Paver patio | 300 sq ft | $3,500 – $6,400 | +17% |
| Detached garage | 576 sq ft | $33,300 – $66,900 | +15% |
Quality levels and sizes in Washington
The cited range is cut into three overlapping bands (basic, standard and premium) and scaled to statewide Washington wages and prices. The grid prices the same bands at 4 common sizes.
Basic
$8,500 to $11,900
Pressure-treated pine, low to the ground, simple rectangle
Standard
$11,000 to $14,500
Cedar or upgraded pine, stairs and a railing
Premium
$13,600 to $17,000
Hardwood decking, multi-level, built-in features
| Size | Basic | Standard | Premium |
|---|---|---|---|
| 10x12 (120 sq ft) | $3,400 – $4,800 | $4,450 – $5,850 | $5,500 – $6,900 |
| 12x12 (144 sq ft) | $4,100 – $5,750 | $5,350 – $7,000 | $6,600 – $8,250 |
| 16x20 (320 sq ft) | $9,050 – $12,700 | $11,800 – $15,400 | $14,500 – $18,100 |
| 20x20 (400 sq ft) | $11,300 – $15,800 | $14,700 – $19,200 | $18,100 – $22,600 |
Optional extras in Washington
Extras are quoted nationally and then scaled to Washington by the average of the local wage index (1.22) and goods index (1.04), a factor of 1.13. Tick any of them in the estimator above to add them to your total. Treat these as planning figures: an add-on touches different trades than the main job, so the scaling is an approximation.
| Add-on | Local range |
|---|---|
| Add stairs (flat) | $1,600 – $2,950 |
Wood deck: what moves the price in Washington
Wood species
Pressure-treated pine is the cheapest at $25-$50 per sq ft installed. Ipe runs $50-$70 and bamboo $27-$52 (HomeGuide).
Height and stairs
A second-story deck needs more structure. New stairs run $1,400-$2,600 installed.
Railing
A wood or vinyl railing adds $20-$60 per linear foot.
Replacement versus new
Deck replacement costs $30-$55 per sq ft because of demolition and haul-away.
Permit
Deck permits average $50-$150. Many cities skip the permit for small, low, freestanding decks.
Washington labor market for wood deck
Statewide wages come from BLS's state-level estimates, which blend big cities with small towns and rural areas. 2 trades drive the labor line for this job, and the weighted ratio against the national wage level is 1.22 for Washington.
For carpenters (47-2031, weighted 80%) the local median is $35.67 an hour, which is 22% above the national $29.12. The middle half of them earn between $29.15 and $44.55 an hour. BLS counts 26,960 of them working in the state, 75.9 for every 10,000 jobs (US: 43.1), so the local bench is deeper than average.
Construction laborers (47-2061), 20% of the weighting: a median of $27.75 an hour, 22% above the US median of $22.66. The middle half of them earn between $22.56 and $34.69 an hour. About 25,060 work in the state. That is 70.6 per 10,000 jobs, compared with 70.5 nationally, so the supply of crews looks typical.
A crew paid at the 75th percentile for carpenters ($44.55 an hour) would add about $1,200 to the statewide midpoint; one at the 25th percentile ($29.15) would take off about $890. Use that as a rough guide to how far a bid can sit from our midpoint on wages alone.
BLS counts 3,550,970 jobs across Washington (May 2025), which is 2.3% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 80% | $29.15 | $35.67 | $44.55 | $29.12 | 1.22 | state |
| Construction laborers (47-2061) | 20% | $22.56 | $27.75 | $34.69 | $22.66 | 1.22 | state |
| Blended | 100% | 1.22 | |||||
Washington seasons and wood deck
Season matters for wood deck. For each Washington metro below we took NOAA's 1991-2020 monthly normals from the nearest suitable station and counted comfortable months for exterior installation.
Seattle has the longest comfortable season of the metros we cover in Washington at 12 months; Kennewick has the shortest at 8 (February through June and September through November). Rainfall runs from 8 inches a year in Kennewick to 57 inches in Bremerton.
We do not adjust prices by month, because we have no reliable published data on seasonal pricing. Timing is still worth raising when you collect bids.
| Metro | Jan avg low °F | Jul avg high °F | Precip (in/yr) | Comfortable months |
|---|---|---|---|---|
| Seattle | 37 | 77 | 38 | 12: all year |
| Spokane | 26 | 87 | 17 | 9: March through November |
| Olympia | 33 | 78 | 51 | 12: all year |
| Kennewick | 28 | 93 | 8 | 8: February through June and September through November |
| Yakima | 24 | 90 | 8 | 9: February through June and August through November |
| Bremerton | 36 | 77 | 57 | 12: all year |
| Bellingham | 34 | 73 | 35 | 12: all year |
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Wood deck in Washington: your questions
+How much does it cost to build a wood deck in Washington?
$8,500 to $17,000 for 300 sq ft, using statewide wages and prices. Metro areas inside Washington can sit above or below that.
+Which city in Washington is cheapest for wood deck?
Spokane at about $11,800 (midpoint, 300 sq ft). The priciest is Seattle at $12,900.
+Is wood deck cheaper in Washington than the US average?
It is 12% more expensive: $12,700 against $11,400 for 300 sq ft at the midpoint.
+What share of the price is labor in Washington?
About 48% ($6,050). Materials are 52%. Statewide labor for this job is weighted 1.22x the national wage level.
+What do carpenters earn in Washington?
The BLS statewide median is $35.67 an hour, against $29.12 for the US. The 25th to 75th percentile range is $29.15 to $44.55.
+Where does Washington rank for wood deck costs?
6th most expensive of 51 (the 50 states plus DC) at the midpoint, $12,700 for 300 sq ft. Rank 1 is the costliest.
+What do basic and premium wood deck work cost in Washington?
For 300 sq ft, basic work runs $8,500 to $11,900 and premium work $13,600 to $17,000. Basic means: pressure-treated pine, low to the ground, simple rectangle. Premium means: hardwood decking, multi-level, built-in features.
+Does the season matter for wood deck in Washington?
Yes where winters or summers are hard. Of the Washington metros we cover, Seattle has the most comfortable months (12 of 12) based on NOAA 1991-2020 normals. Our prices do not change by month, so ask contractors whether they charge more or less in busy and slow seasons.
+What does "add stairs" add in Washington?
$1,600 to $2,950, from a national range scaled by the statewide wage and goods indexes.
Wood deck by city in Washington
Where these numbers come from
Base prices are national ranges from the sources below. We scale labor by local BLS wages, materials by BEA goods prices and permits by the BEA all-items price level. Full method on the methodology page.
- HomeGuide: How Much Does It Cost to Build a Deck? (2026) (accessed November 4, 2026)
- HomeGuide: 2026 Building Permit Costs | Fees & Cost Calculator (accessed November 4, 2026)
- HomeGuide: How Much Does Composite Decking Cost? (2026) (accessed November 4, 2026)
- BLS Occupational Employment and Wage Statistics, May 2025
- BEA Regional Price Parities, 2024
- NOAA NCEI U.S. Climate Normals, 1991-2020