A 20 ft deck board typically costs $18-$140 for the board alone, depending on material, grade, and brand; a common pressure-treated board averages about $26. Installed pricing often reaches $75-$300 per board when labor, fasteners, and job minimums are included. Board width, deck access, local labor rates, and whether the work is a repair or a full installation make the biggest difference.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Pressure-treated 20 ft board | $18 | $26 | $35 | Typical 5/4 x 6 residential decking |
| Cedar 20 ft board | $35 | $48 | $65 | Grade and availability affect price |
| Composite 20 ft board | $55 | $82 | $110 | Brand, profile, and color affect price |
| PVC 20 ft board | $75 | $105 | $140 | Usually a premium synthetic option |
| Installed replacement | $75 | $150 | $300 | One-board repairs may carry a service minimum |
Assumptions: 20 ft nominal-length decking, standard residential profiles, typical U.S. retail pricing, and no structural framing replacement.
What a 20 ft deck board costs by material
For a standard 5/4 x 6 pressure-treated deck board, a realistic retail range is $18-$35, or about $0.90-$1.75 per linear foot. The average is roughly $26 per board. These boards are widely stocked, but a 20 ft piece can be harder to find than shorter lengths, and some stores price long boards at a premium.
Cedar decking commonly runs $35-$65 per 20 ft board, or $1.75-$3.25 per linear foot. Clearer grades and boards selected for fewer knots cost more. Redwood may run $45-$85 for the same length where it is available, with regional supply making a substantial difference.
Composite boards often cost $55-$110, equivalent to $2.75-$5.50 per linear foot. Entry-level or scalloped profiles tend to sit toward the low end; capped boards, textured finishes, and higher-end colors can push prices higher. PVC decking typically ranges from $75-$140, or $3.75-$7 per linear foot.
For a basic replacement, pressure-treated lumber usually has the lowest purchase price, while composite and PVC have much higher material costs. These are board-only estimates for common decking widths, not a complete deck project. Wider boards, specialty profiles, unusually long lengths, and local stock limitations may increase the quote.
How fasteners and labor change the board quote
The material on the receipt is only one part of an installed price. A contractor may include removal of the old board, disposal, cutting, fastening, cleanup, and travel. A single-board repair can cost more per board than a large installation because setup and travel time are spread across very little work.
| Quote item | Low | Average | High | Pricing basis |
|---|---|---|---|---|
| Pressure-treated board | $18 | $26 | $35 | Per 20 ft board |
| Deck screws or clips | $3 | $7 | $15 | Per board share, depending on system |
| Removal and disposal | $10 | $25 | $50 | Per board; higher for difficult removal |
| Installation labor | $45 | $90 | $180 | Per board share on a multi-board job |
| Trip or minimum charge | $75 | $150 | $300 | Per small repair visit |
Fastener costs depend on the decking. Face-screwed wood can use compatible exterior-rated screws; composite or PVC may require hidden clips designed for the board profile. A clip system can add about $1-$3 per square foot in fasteners and accessories, while plugs or color-matched screws can add $10-$35 for a small repair.
Labor is commonly estimated at $50-$100 per hour for deck carpentry, though rates vary by market. A straightforward board replacement may take 1-2 hours once a crew arrives, but matching, cutting around obstacles, and removing damaged fasteners can extend the work.
For one replacement board, the contractor’s minimum charge can exceed the board and fastener cost combined. On a larger decking job, labor and setup are distributed across more boards, so the installed price per board is usually lower.
Board width, decking type, and framing condition matter
Width changes the amount of deck surface one board covers. A typical 5/4 x 6 board is about 5.5 inches wide; with a small drainage gap, a 20 ft board covers roughly 9 square feet. A 2 x 6 board is thicker and heavier, and its price may be 20%-50% above a comparable 5/4 board. Confirm actual width and thickness before comparing quotes.
Decking material can also impose installation requirements. Composite boards need manufacturer-approved spacing and fastening, while PVC can require specific clips or screw locations. If a contractor must use a proprietary fastener system, the accessory cost may rise by $1-$3 per square foot. Mixing products from different brands can create fit or warranty problems.
Condition of the joists is a major scope variable. If the supporting framing is sound and properly spaced, the work may be limited to decking. If joists are spaced more than 16 inches apart, damaged, or unsuitable for the selected composite product, framing corrections may be needed. Replacing a joist can add roughly $100-$300 per joist, depending on access and extent of repair.
Long boards also create handling and access costs. Narrow stairs, a second-story deck, landscaping, or a long carry from the delivery point can add time. A 20 ft board may need two workers to move safely, and a site with difficult access can add $25-$100 or more to delivery or labor.
Check board dimensions, joist spacing, and the condition of the framing before treating a material-only price as the full project cost. A low board quote may not include the changes needed to install that product correctly.
How much installation labor adds per 20 ft board
For a multi-board decking installation with clear access, labor allocation often works out to about $45-$100 per 20 ft board for a simple layout. Complex cuts, borders, stairs, picture framing, or hidden-fastener installation can increase that to $100-$180 per board equivalent. These figures describe the labor portion, not the board material.
On a square-foot basis, contractors may quote roughly $8-$18 per square foot for labor to install decking over suitable existing framing. This is a broad planning range: a large open deck can fall below it, while a small repair or detailed pattern can exceed it. If old decking must be removed, demolition may add $2-$6 per square foot, plus disposal charges.
A single-board repair commonly has a total service price of $100-$300, including a basic lumber board and labor. Replacing several boards during the same visit may reduce the average cost per board. A contractor may still set a $75-$200 minimum for travel, scheduling, and setup, even when the work takes less than an hour.
Ask whether the quote is priced by the board, by the square foot, or by time and materials. For small work, also confirm whether removal, disposal, fasteners, and the trip charge are included. This prevents a low labor figure from appearing comparable to a complete installed price.
Regional prices for 20 ft boards and deck repairs
Retail board prices vary with local supply, freight, and seasonal inventory. Pressure-treated lumber is generally stocked across the country, but a 20 ft length may be less common in some stores. Composite and PVC pricing can be more consistent by brand, but delivery and dealer availability still affect the final bill.
Labor rates in major coastal cities and high-cost metro areas may run 15%-35% above a national midrange. Rural markets can have lower hourly rates but higher travel charges or fewer contractors able to source a particular 20 ft profile. In regions where cedar or redwood is locally abundant, those species may cost less than in areas that rely on long-distance shipping.
Delivery can be especially important for long boards. A local store may offer pickup at no charge, while delivery of long-length lumber can cost $50-$150 or more, depending on order size and distance. A small order may also face a minimum delivery fee. Compare the delivered price rather than the shelf price when ordering a few boards.
Use local quotes for labor and delivery, but compare board prices by the same species, dimensions, grade, and length. A 16 ft board price is not a direct substitute for a 20 ft board price because long-stock availability and freight can affect the rate.
Three realistic quotes for different 20 ft board jobs
A basic pressure-treated repair on an accessible ground-level deck might include one 5/4 x 6 board at $26, $8 in screws, and 1.5 hours of labor at $70 per hour. With removal and disposal at $25, the calculated total is about $164. A contractor’s minimum or trip fee could raise the actual quote to around $175-$250.
A five-board cedar replacement on a standard deck could include five boards at $48 each, $35 in fasteners, $100 for removal and disposal, and about 6 hours of labor at $75 per hour. The subtotal is about $833; with delivery and minor consumables, a practical quote may reach $850-$1,000. This assumes the framing is usable and no railing or stairs need to be moved.
A ten-board composite replacement might use boards priced at $82 each, $140 in compatible clips, $250 for removal and disposal, and 12 hours of labor at $85 per hour. That totals about $2,510 before delivery or framing repairs. A reasonable planning range is $2,500-$3,000 with accessible framing and a straightforward layout.
Quote totals rise quickly when the project includes removal, brand-specific fasteners, delivery, or a small-job minimum. The examples are estimates rather than fixed market prices; material grade, tax, labor market, and site conditions can move each total.
Pressure-treated wood, composite, and PVC compared
Pressure-treated lumber is usually the least expensive initial option and can be practical when the existing deck already uses wood. It needs periodic cleaning and may need staining or sealing, depending on the product and exposure. Boards can shrink, split, or warp, so selecting straight stock and allowing it to acclimate as directed can reduce installation problems.
Cedar costs more upfront but provides a natural appearance and is lighter to handle. Its durability depends on grade, moisture exposure, and maintenance. Composite usually has a higher initial price but avoids routine staining; it still needs cleaning and can require brand-matched replacement boards if the product line or color is discontinued.
PVC is often the highest-priced alternative, with low moisture absorption and no wood content. Its price can be justified where moisture exposure or reduced upkeep is a priority, but a single replacement may be difficult to match exactly in color and profile. Availability of the same product line matters for repairs.
For a 20 ft board, the material-price difference between pressure-treated lumber and a premium PVC product can exceed $100 before installation. Across a 300-square-foot deck, that difference can become several thousand dollars. Compare the full decking area and fastener requirements rather than deciding from the cost of one board alone.
Choose by installed project price and expected upkeep, not just the per-board sticker price. Replacing one damaged board with a different material may also create visible color, texture, or thickness differences.
Ways to lower a 20 ft deck board replacement bill
Combining repairs is often the most effective way to reduce per-board labor. If several boards are loose, cracked, or rotting, listing them together can avoid paying separate trip charges. Before scheduling, identify the number of boards and their locations, and send clear photos so the contractor can estimate materials and access requirements.
Keep the repair scope focused. If only the decking is damaged and the joists are sound, replacement may be less expensive than rebuilding the entire deck. Ask the contractor to inspect the framing and explain any proposed structural work. Replacing framing that is sound may add cost without solving a current problem, while concealing damaged joists can lead to repeat work.
Standard pressure-treated sizes and commonly stocked colors usually cost less than special-order lengths or premium finishes. If a 20 ft piece is not essential, compare the layout and waste from two shorter boards, but do not add an unsupported joint between joists. The design must preserve proper support and follow the decking manufacturer’s installation requirements.
Compare at least two or three written quotes using the same board dimensions, material, removal scope, fasteners, and disposal terms. Ask whether tax and delivery are included, and whether a minimum charge applies. Buying materials independently can sometimes save money, but verify that the contractor accepts customer-supplied boards and will stand behind the installation.
Control the scope, combine repairs, and compare complete installed quotes before choosing a material. Avoid paying extra for a premium upgrade on a small repair if the product cannot be matched to the rest of the deck or if the framing needs attention first.