Composite deck cost in Rapid City, SD
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $10,600 – $21,300
- Per sq ft
- $35.50 – $70.50
- before permit
- Versus US midpoint
- −12%
- US $18,100
- Rank of 300 metros
- #227
- 1 = most expensive
Rapid City homeowners pay roughly $10,600 to $21,300 to build a composite deck at 300 sq ft, or $35.50 to $70.50 per sq ft (permit not included). Against the US midpoint, Rapid City is 12% lower. Carpenters earn a median of $23.39 an hour in the Rapid City area, 20% below the US median of $29.12.
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Estimated cost for 300 sq ft in Rapid City, SD, standard level
$13,900 to $18,100
About $46 to $60 per sq ft before permits. Labor is about 56% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $5,950 | $7,800 |
| Labor | $7,850 | $10,200 |
| Permits and fees | $70 | $110 |
| Total | $13,900 | $18,100 |
Cost breakdown for 300 sq ft in Rapid City, SD
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $4,600 | $6,850 | $9,150 | 43% |
| Labor | $6,000 | $9,050 | $12,000 | 56% |
| Permits and fees | $45 | $90 | $130 | 1% |
| Total | $10,600 | $16,000 | $21,300 | 100% |
Where the Rapid City price comes from
Labor is 56% 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 Rapid City the blended ratio comes out at 0.84.
On the materials line, the BEA goods price index for the Rapid City metro is 95.5 (US = 100). The midpoint materials bill for 300 sq ft comes to $6,850, compared with $7,200 at national prices. Permit and inspection fees are scaled by the broader index (89.2) and land at $45 to $130.
When to schedule composite deck in Rapid City
We use NOAA's 1991-2020 climate normals for Rapid City Wfo (in the city). These are 30-year monthly averages, not forecasts.
March through November is the stretch where exterior installation runs into the fewest weather problems in Rapid City (9 of 12 months). January, February and December have an average daytime high under 45°F.
In January, February and December the average high stays below 45°F. Sealants, adhesives and some materials, such as vinyl, are harder to install well in the cold, and short daylight cuts the working day.
Rapid City gets about 20 inches of precipitation in a normal year, including roughly 54 inches of snow. The wettest months are May, June and July (4.1 inches in May). Inside the workable window, March and November are the driest, at 0.9 and 0.5 inches. The station averages about 24 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 | 37 | 16 | 0.3 | Cold |
| Feb | 38 | 18 | 0.5 | Cold |
| Mar | 47 | 26 | 0.9 | Workable |
| Apr | 55 | 34 | 2.3 | Workable |
| May | 65 | 45 | 4.1 | Workable |
| Jun | 76 | 55 | 3.3 | Workable |
| Jul | 84 | 62 | 2.6 | Workable |
| Aug | 83 | 60 | 2.2 | Workable |
| Sep | 74 | 51 | 1.4 | Workable |
| Oct | 59 | 38 | 1.5 | Workable |
| Nov | 47 | 27 | 0.5 | Workable |
| Dec | 38 | 19 | 0.4 | Cold |
How Rapid City compares
Same job, same size (300 sq ft), priced for the nearest metros. Fort Collins is the priciest of the group at $17,500.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Rapid City, SDthis page | $10,600 – $21,300 | $16,000 | |
| Bismarck, ND210 miles | $11,400 – $22,800 | $17,100 | +7% |
| Cheyenne, WY220 miles | $11,400 – $22,800 | $17,100 | +7% |
| Greeley, CO260 miles | $11,600 – $23,200 | $17,400 | +9% |
| Fort Collins, CO275 miles | $11,700 – $23,400 | $17,500 | +10% |
| Sioux Falls, SD305 miles | $10,800 – $21,600 | $16,200 | +1% |
| South Dakota (statewide) | $10,600 – $21,200 | $15,900 | level |
| United States | $12,100 – $24,200 | $18,100 | +13% |
Across 300 US metros, Rapid City comes in at #227 from the top. The priciest is Honolulu, HI at $25,200; the cheapest is Brownsville, TX at $13,500 (midpoints, 300 sq ft). Statewide, Rapid City is 0% above the South Dakota figure.
Other South Dakota metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Sioux Falls, SD | 178,590 jobs | $10,800 – $21,600 | $16,200 | +1% |
Cities with a workforce like Rapid City's
Big cities and small ones price differently, so here is Rapid City against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Blacksburg, VA | 74,070 jobs | $10,500 – $21,000 | $15,800 | −1% |
| Kahului, HI | 73,750 jobs | $15,700 – $31,400 | $23,500 | +47% |
| Sioux City, IA | 75,010 jobs | $10,900 – $21,800 | $16,400 | +2% |
| Bloomington, IN | 73,240 jobs | $11,900 – $23,800 | $17,900 | +12% |
Cost by quality level and size in Rapid City
Three bands are cut from the same cited range and localized for Rapid City 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
$10,600 to $14,900
Entry-level composite boards, low deck, simple shape
Standard
$13,900 to $18,100
Mid-grade capped boards with railing and stairs
Premium
$17,100 to $21,300
Premium capped or PVC boards, multi-level, hidden fasteners
| Size | Basic | Standard | Premium |
|---|---|---|---|
| 10x12 (120 sq ft) | $4,300 – $6,000 | $5,600 – $7,300 | $6,900 – $8,600 |
| 12x12 (144 sq ft) | $5,150 – $7,200 | $6,700 – $8,750 | $8,250 – $10,300 |
| 16x20 (320 sq ft) | $11,400 – $15,900 | $14,800 – $19,300 | $18,200 – $22,800 |
| 20x20 (400 sq ft) | $14,200 – $19,900 | $18,500 – $24,100 | $22,700 – $28,400 |
Add-ons priced for Rapid City
Extras are quoted nationally and then scaled to Rapid City by the average of the local wage index (0.84) and goods index (0.95), a factor of 0.90. 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) | $1,600 – $4,850 |
Local wages behind the labor line
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 Rapid City is 0.84 times the national level.
For carpenters (47-2031, weighted 80%) the local median is $23.39 an hour, which is 20% below the national $29.12. The middle half of them earn between $21.34 and $28.88 an hour. BLS counts 870 of them working in the area, 117.9 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 $21.94 an hour, 3% below the US median of $22.66. The middle half of them earn between $19.14 and $22.91 an hour. About 410 work in the metro. That is 55.5 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 ($28.88 an hour) instead of the median, the labor line grows by about $1,650. At the 25th percentile ($21.34) it shrinks by about $610. The total moves by 10.2% or 3.8%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 73,820 jobs in the Rapid City area. That makes it the 249th largest of the 300 metros we cover, with 0.05% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 80% | $21.34 | $23.39 | $28.88 | $29.12 | 0.80 | metro |
| Construction laborers (47-2061) | 20% | $19.14 | $21.94 | $22.91 | $22.66 | 0.97 | metro |
| Blended | 100% | 0.84 | |||||
Composite deck: what moves the price in Rapid City
Labor
Labor for composite is $24-$48 per sq ft, higher than wood because the boards need extra parts and more careful assembly.
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.
Planning more than one job in Rapid City?
Because every project leans on different trades, Rapid City's wage level does not move all prices equally. Against the US midpoint, paver patio runs −5% and wood deck −10%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Wood deck | 300 sq ft | $6,800 – $13,700 | −10% |
| Concrete patio | 300 sq ft | $1,150 – $3,650 | −8% |
| Paver patio | 300 sq ft | $2,850 – $5,200 | −5% |
| Gutters | 160 linear ft | $1,150 – $3,800 | −10% |
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 $13,900 to $18,100 for Rapid City, SD is attached.
A detailed PDF report of this estimate, $9
The report lays out the composite deck numbers for Rapid City, SD line by line, with the local wage and price inputs, permit and timing notes, a quote comparison sheet and the full method. 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 Rapid City: your questions
+How much does it cost to build a composite deck in Rapid City?
For 300 sq ft, expect $10,600 to $21,300 in the Rapid City area. A standard-spec job lands at $13,900 to $18,100. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for composite deck in Rapid City?
About $35.50 to $70.50 per sq ft for materials and labor, plus $45 to $130 for the permit if one is needed. The US range is $40 to $80.
+Is composite deck cheaper in Rapid City or Bismarck?
Bismarck is 210 miles away. The midpoint for 300 sq ft there is $17,100, which is 7% more than Rapid City ($16,000). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Rapid City?
About 56% at the midpoint, or $9,050 out of $16,000. Materials are 43% and permits 1%. Nationally, labor is 60%.
+What would 16x20 (320 sq ft) cost in Rapid City?
$11,400 to $22,800. Pick a different size in the estimator above to get your own number.
+Does composite deck need a permit in Rapid City?
Often, but rules are set by your city or county building office, so call before you hire. Budget $45 to $130 for fees in the Rapid City area (our national range of $50 to $150 scaled by the local price level).
+Is Rapid City expensive for composite deck compared with the rest of South Dakota?
Rapid City is 0% above the South Dakota statewide estimate ($15,900 at the midpoint). We cover 2 metros in South Dakota; see the state page to compare them.
+What do carpenters earn in Rapid City?
The BLS median is $23.39 an hour in the Rapid City area, compared with $29.12 nationally. The 25th to 75th percentile range is $21.34 to $28.88.
+What do basic and premium composite deck work cost in Rapid City?
For 300 sq ft, basic work runs $10,600 to $14,900 and premium work $17,100 to $21,300. Basic means: entry-level composite boards, low deck, simple shape. Premium means: premium capped or PVC boards, multi-level, hidden fasteners.
+When is the best time to build a composite deck in Rapid City?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are March through November. March and November are typically the driest of those months. Local contractors' schedules matter as much as the weather, so book early for the busy months.
+What does "add a deck railing" add in Rapid City?
$1,600 to $4,850 for 300 sq ft, from a national range scaled by the local wage and goods indexes.
Composite deck near Rapid City
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