Composite Deck costs $37.31 to $79.29 per sq ft in Rapid City in 2026. For a 400 sq ft project, expect $14,926 – $31,717 installed, typically near $23,322. That is essentially in line with the South Dakota average.
Rapid City composite deck calculator
Planning estimate. Wage index applies to the labor share only; materials held at national prices. Get three written quotes.
How Rapid City compares with the rest of South Dakota
Construction wages in Rapid City average $26.39 per hour against $26.41 statewide, so pricing tracks the South Dakota norm closely.
Labor is about 42% of the installed cost on this type of work, and it is the part that actually moves between markets. Materials are priced by national manufacturers and barely shift, which is why the gap between metros is narrower than wage differences alone suggest.
Composite Deck cost by project size in Rapid City
| Project size | Rapid City range | Typical |
|---|---|---|
| 100 sq ft | $3,731 – $7,929 | $5,830 |
| 200 sq ft | $7,463 – $15,859 | $11,661 |
| 300 sq ft | $11,194 – $23,788 | $17,491 |
| 400 sq ft | $14,926 – $31,717 | $23,322 |
| 600 sq ft | $22,389 – $47,576 | $34,983 |
| 800 sq ft | $29,852 – $63,435 | $46,643 |
| 1,000 sq ft | $37,315 – $79,294 | $58,304 |
| 1,500 sq ft | $55,972 – $118,941 | $87,456 |
Where the money goes
For a 400 sq ft project in Rapid City at roughly $23,322, a typical bill splits like this:
| Line item | Share | Cost |
|---|---|---|
| Labor | 42% | $9,795 |
| Materials | 44% | $10,262 |
| Site prep & equipment | 8% | $1,866 |
| Overhead, disposal & finishing | 6% | $1,399 |
Rapid City compared with other South Dakota markets
| Area | Cost per sq ft | vs Rapid City |
|---|---|---|
| Sioux Falls | $37.77 – $80.25 | +1% |
| East South Dakota nonmetropolitan area | $37.06 – $78.75 | −1% |
| West South Dakota nonmetropolitan area | $36.66 – $77.91 | −2% |
| South Dakota average | $37.33 – $79.32 | 0% |
Ground conditions and code in Rapid City
Permits in Rapid City
A residential permit for this work typically runs around $250 in South Dakota. Permit cost is rarely included in a contractor quote, so budget it separately and confirm scope with the Rapid City building department before work begins.
Hiring in Rapid City
Get three written, itemised quotes from licensed and insured contractors, each specifying the same scope and grade of material. Ask for local references and check the licence is current in South Dakota.
Frequently asked questions
How much does composite deck cost in Rapid City?
In 2026, composite deck costs $37.31 to $79.29 per sq ft in Rapid City. For a 400 sq ft project, the installed total typically lands between $14,926 and $31,717.
Is Rapid City more expensive than the rest of South Dakota?
Not meaningfully. Rapid City prices track the South Dakota average closely.
Do I need a permit in Rapid City?
Most work of this type and value requires a permit. Budget around $250 in South Dakota and allow extra time for review in metro jurisdictions.
How do I compare quotes in Rapid City?
Get three written, itemised quotes covering identical scope and materials. A bid far below the others usually signals a reduced specification rather than better value.
Nearby markets
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