Composite deck cost in Boulder, CO
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $11,800 – $23,700
- Per sq ft
- $39 – $78.50
- before permit
- Versus US midpoint
- −2%
- US $18,100
- Rank of 300 metros
- #122
- 1 = most expensive
If you want to build a composite deck in Boulder, plan on $11,800 to $23,700 for 300 sq ft, all in. Per sq ft, that is $39 to $78.50 for materials and labor, with the permit on top. The local midpoint lands close to the national one. Building materials run about 4% below the US average here (BEA goods price index 96.1).
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Estimated cost for 300 sq ft in Boulder, CO, standard level
$15,400 to $20,100
About $51 to $66.50 per sq ft before permits. Labor is about 60% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $6,000 | $7,850 |
| Labor | $9,300 | $12,200 |
| Permits and fees | $85 | $130 |
| Total | $15,400 | $20,100 |
Cost breakdown for 300 sq ft in Boulder, CO
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $4,600 | $6,900 | $9,200 | 39% |
| Labor | $7,150 | $10,700 | $14,300 | 60% |
| Permits and fees | $55 | $110 | $160 | 1% |
| Total | $11,800 | $17,700 | $23,700 | 100% |
Why Boulder prices look the way they do
Labor is 60% of the midpoint bill here, against 60% nationally. The mix of trades behind this job is carpenters (80%), construction laborers (20%). We weight each trade's local median wage by that share and compare it with the national median. In Boulder the blended ratio comes out at 0.99.
On the materials line, the BEA goods price index for the Boulder metro is 96.1 (US = 100). The midpoint materials bill for 300 sq ft comes to $6,900, compared with $7,200 at national prices. Permit and inspection fees are scaled by the broader index (105.2) and land at $55 to $160.
Boulder labor market for composite deck
Wages are the part of this estimate that changes most from town to town. 2 trades carry the job here, and each is compared with its US median. The weighted result for Boulder is 0.99 times the national level.
For carpenters (47-2031, weighted 80%) the local median is $28.73 an hour, which is in line with the national $29.12. The middle half of them earn between $23.92 and $35.50 an hour. BLS counts 540 of them working in the area, 28.1 for every 10,000 jobs (US: 43.1), so the local bench is thinner than average.
Construction laborers (47-2061), 20% of the weighting: a median of $23.07 an hour, in line with the US median of $22.66. The middle half of them earn between $19.64 and $28.23 an hour. About 540 work in the metro. That is 28.1 per 10,000 jobs, compared with 70.5 nationally, so expect fewer local crews to bid.
Quotes come from real crews, not medians. If the carpenters on your job are paid at the 75th percentile ($35.50 an hour) instead of the median, the labor line grows by about $2,000. At the 25th percentile ($23.92) it shrinks by about $1,450. The total moves by 11.3% or 8.0%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 192,390 jobs in the Boulder area. That makes it the 119th largest of the 300 metros we cover, with 0.12% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 80% | $23.92 | $28.73 | $35.50 | $29.12 | 0.99 | metro |
| Construction laborers (47-2061) | 20% | $19.64 | $23.07 | $28.23 | $22.66 | 1.02 | metro |
| Blended | 100% | 0.99 | |||||
Boulder against nearby metros and the rest of Colorado
Same job, same size (300 sq ft), priced for the nearest metros. Denver is the priciest of the group at $18,900. Cheyenne is the cheapest at $17,100.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Boulder, COthis page | $11,800 – $23,700 | $17,700 | |
| Fort Collins, CO40 miles | $11,700 – $23,400 | $17,500 | −1% |
| Denver, CO55 miles | $12,600 – $25,200 | $18,900 | +6% |
| Greeley, CO60 miles | $11,600 – $23,200 | $17,400 | −2% |
| Cheyenne, WY90 miles | $11,400 – $22,800 | $17,100 | −4% |
| Colorado Springs, CO95 miles | $11,500 – $23,100 | $17,300 | −2% |
| Colorado (statewide) | $12,200 – $24,500 | $18,400 | +4% |
| United States | $12,100 – $24,200 | $18,100 | +2% |
Across 300 US metros, Boulder comes in at #122 from the top. The priciest is Honolulu, HI at $25,200; the cheapest is Brownsville, TX at $13,500 (midpoints, 300 sq ft). Statewide, Boulder is 3% below the Colorado figure.
Other Colorado metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Denver, CO | 1,609,350 jobs | $12,600 – $25,200 | $18,900 | +6% |
| Colorado Springs, CO | 316,060 jobs | $11,500 – $23,100 | $17,300 | −2% |
| Fort Collins, CO | 169,430 jobs | $11,700 – $23,400 | $17,500 | −1% |
| Greeley, CO | 119,540 jobs | $11,600 – $23,200 | $17,400 | −2% |
| Grand Junction, CO | 67,170 jobs | $11,800 – $23,600 | $17,700 | −1% |
| Pueblo, CO | 61,780 jobs | $11,400 – $22,800 | $17,100 | −4% |
Cities with a workforce like Boulder's
Big cities and small ones price differently, so here is Boulder against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Corpus Christi, TX | 192,580 jobs | $10,300 – $20,700 | $15,500 | −13% |
| Wilmington, NC | 191,280 jobs | $10,900 – $21,900 | $16,400 | −7% |
| Modesto, CA | 195,230 jobs | $14,000 – $28,000 | $21,000 | +18% |
| Pensacola, FL | 190,480 jobs | $10,500 – $21,100 | $15,800 | −11% |
Planning more than one job in Boulder?
Because every project leans on different trades, Boulder's wage level does not move all prices equally. Against the US midpoint, paver patio runs +3% and gutters −3%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Wood deck | 300 sq ft | $7,350 – $14,800 | −2% |
| Concrete patio | 300 sq ft | $1,250 – $4,100 | +2% |
| Paver patio | 300 sq ft | $3,050 – $5,600 | +3% |
| Gutters | 160 linear ft | $1,250 – $4,050 | −3% |
Optional extras in Boulder
Extras are quoted nationally and then scaled to Boulder by the average of the local wage index (0.99) and goods index (0.96), a factor of 0.98. 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 a deck railing (approx. 0.3 ft per sq ft) | $1,750 – $5,250 |
Climate in Boulder: timing your composite deck job
We use NOAA's 1991-2020 climate normals for Boulder (5 miles from the city center). These are 30-year monthly averages, not forecasts.
Weather is not a serious constraint for exterior installation in Boulder: no month in the averages is cold enough (an average daytime high under 45°F) or hot enough (an average daytime high of 90°F or more) to rule it out, so the workable window is all year.
Boulder gets about 21 inches of precipitation in a normal year, including roughly 93 inches of snow. The wettest months are April, May and September (3.2 inches in May). The station averages about 33 days a year at 90°F or above.
Does the season change the price? Probably, but we do not have a sourced seasonal price curve, so the estimator shows a year-round figure and does not adjust by month. When you collect quotes, ask whether scheduling in a slower month gets a better rate.
| Month | Avg high °F | Avg low °F | Precip (in) | For this job |
|---|---|---|---|---|
| Jan | 47 | 22 | 0.8 | Workable |
| Feb | 48 | 22 | 1.0 | Workable |
| Mar | 57 | 29 | 2.0 | Workable |
| Apr | 63 | 35 | 3.0 | Workable |
| May | 71 | 43 | 3.2 | Workable |
| Jun | 83 | 51 | 1.9 | Workable |
| Jul | 88 | 57 | 1.8 | Workable |
| Aug | 86 | 56 | 1.7 | Workable |
| Sep | 79 | 48 | 2.1 | Workable |
| Oct | 66 | 37 | 1.6 | Workable |
| Nov | 55 | 28 | 1.2 | Workable |
| Dec | 46 | 21 | 0.8 | Workable |
Cost by quality level and size in Boulder
Three bands are cut from the same cited range and localized for Boulder wages and prices. They overlap on purpose: a good standard job and a modest premium job can cost the same. The grid below prices the same bands at 4 common sizes.
Basic
$11,800 to $16,600
Entry-level composite boards, low deck, simple shape
Standard
$15,400 to $20,100
Mid-grade capped boards with railing and stairs
Premium
$18,900 to $23,700
Premium capped or PVC boards, multi-level, hidden fasteners
| Size | Basic | Standard | Premium |
|---|---|---|---|
| 10x12 (120 sq ft) | $4,750 – $6,700 | $6,200 – $8,100 | $7,650 – $9,550 |
| 12x12 (144 sq ft) | $5,700 – $8,000 | $7,400 – $9,700 | $9,150 – $11,400 |
| 16x20 (320 sq ft) | $12,600 – $17,700 | $16,400 – $21,400 | $20,200 – $25,200 |
| 20x20 (400 sq ft) | $15,700 – $22,000 | $20,500 – $26,800 | $25,200 – $31,500 |
Composite deck: what moves the price in Boulder
Drainage
Ground-level decks over poorly draining yards may need $1,000-$4,000 of drainage work first.
Engineering
Large or complex decks may need a structural engineer at $100-$220 an hour to get a permit.
Board grade
Composite materials run $16-$32 per sq ft and the installed price is $40-$80 per sq ft, including the substructure (HomeGuide).
Get 3 local quotes
Tell us about the job and we will try to connect you with up to three local contractors for written quotes. It is free and you are under no obligation to hire. Your estimate of $15,400 to $20,100 for Boulder, CO is attached.
Take this estimate with you: PDF report, $9
Multi-page report for Boulder, CO: low, typical and high cost, a line-item breakdown of materials and labor by trade, permit notes, the best months to schedule, a quote comparison sheet, red flags, questions for contractors, checklists and every source. Save your estimate above, preview page 1 free, and unlock the full report for $9 one-time, or get every report with CostLocal Pro.
Composite deck in Boulder: your questions
+How much does it cost to build a composite deck in Boulder?
For 300 sq ft, expect $11,800 to $23,700 in the Boulder area. A standard-spec job lands at $15,400 to $20,100. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for composite deck in Boulder?
About $39 to $78.50 per sq ft for materials and labor, plus $55 to $160 for the permit if one is needed. The US range is $40 to $80.
+Is composite deck cheaper in Boulder or Fort Collins?
Fort Collins is 40 miles away. The midpoint for 300 sq ft there is $17,500, which is 1% less than Boulder ($17,700). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Boulder?
About 60% at the midpoint, or $10,700 out of $17,700. Materials are 39% and permits 1%. Nationally, labor is 60%.
+What would 16x20 (320 sq ft) cost in Boulder?
$12,600 to $25,200. Pick a different size in the estimator above to get your own number.
+Does composite deck need a permit in Boulder?
Often, but rules are set by your city or county building office, so call before you hire. Budget $55 to $160 for fees in the Boulder area (our national range of $50 to $150 scaled by the local price level).
+Is Boulder expensive for composite deck compared with the rest of Colorado?
Boulder is 3% below the Colorado statewide estimate ($18,400 at the midpoint). We cover 7 metros in Colorado; see the state page to compare them.
+What do carpenters earn in Boulder?
The BLS median is $28.73 an hour in the Boulder area, compared with $29.12 nationally. The 25th to 75th percentile range is $23.92 to $35.50.
+What do basic and premium composite deck work cost in Boulder?
For 300 sq ft, basic work runs $11,800 to $16,600 and premium work $18,900 to $23,700. Basic means: entry-level composite boards, low deck, simple shape. Premium means: premium capped or PVC boards, multi-level, hidden fasteners.
+Is there a bad season to build a composite deck in Boulder?
Not from a temperature point of view. NOAA's 1991-2020 normals show no month with a freezing-level overnight low or a 90°F-plus average high, so timing is mostly about contractor availability and rain.
+What does "add a deck railing" add in Boulder?
$1,750 to $5,250 for 300 sq ft, from a national range scaled by the local wage and goods indexes.
Composite deck near Boulder
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 Composite Decking Cost? (2026) (accessed November 4, 2026)
- HomeGuide: 2026 Building Permit Costs | Fees & Cost Calculator (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