14' x 24' Deck Material Calculator
A 336-square-foot large-format deck suited for spacious properties and active entertaining. The 24-foot length accommodates multiple activity zones and can include built-in benches or planters. This 336 sq ft deck requires approximately 66 standard 5.5" x 12' pressure-treated boards, 12 joists, and 12 support posts.
Material Cost Comparison by Decking Type
The table below compares total material costs for a 14' x 24' deck across eight popular decking materials. All estimates use 16-inch joist spacing, perpendicular board pattern, railing on three sides, and one set of stairs. The structural framing (joists, beams, posts, concrete, hardware) is the same regardless of the surface decking material; only the board cost varies between options.
| Decking Material | Boards | Board Cost | Total Materials |
|---|---|---|---|
| Pressure-Treated Pine | 66 | $1,584 | $7,107 |
| Composite | 66 | $3,564 | $9,087 |
| Composite | 66 | $5,544 | $11,067 |
| Western Red Cedar | 66 | $3,564 | $9,087 |
| Redwood | 66 | $6,336 | $11,859 |
| Ipe Hardwood | 66 | $7,128 | $12,651 |
| Mahogany | 66 | $5,148 | $10,671 |
| PVC | 66 | $4,752 | $10,275 |
Complete Material Breakdown (Pressure-Treated Pine)
The following table provides a complete bill of materials for a 14' x 24' deck using pressure-treated pine 5.5" x 12' decking boards. This represents the most common and affordable configuration for residential decks of this size. Each line item includes the quantity needed and estimated cost at current retail pricing.
| Material | Specification | Quantity | Est. Cost |
|---|---|---|---|
| Decking Boards | 5.5" x 12' PT Pine | 66 boards (792 lf) | $1,584 |
| Joists | 2x10 pressure-treated | 12 joists (288 lf) | $461 |
| Beams | 2x10 doubled pressure-treated | 4 beams (112 lf) | $179 |
| Posts | 6x6 x 8' pressure-treated | 12 posts | $2,112 |
| Concrete | 60lb bags for footings | 24 bags | $144 |
| Deck Screws | #10 x 3" coated | 4 boxes (1176 screws) | $220 |
| Hardware | Joist hangers & bolts | 12 hangers, 24 bolts | $102 |
| Railing | Posts, rails, balusters | 62 lf (12 posts) | $2,170 |
| Stairs | Stringers & treads | 3 stringers, 4 treads | $135 |
| Total Material Cost | $7,107 | ||
| Professional Labor Estimate (~$25/sq ft) | $8,400 | ||
Board Pattern Comparison
The board-laying pattern affects both the visual appearance of your deck and the amount of material needed. More complex patterns require additional waste allowance due to the angled and mitered cuts involved. The table below shows how pattern choice affects board count and decking cost for a 14' x 24' deck using pressure-treated pine.
| Pattern | Boards Needed | Linear Feet | Board Cost |
|---|---|---|---|
| Perpendicular (10% waste) | 66 | 792 lf | $1,584 |
| Diagonal (15% waste) | 69 | 828 lf | $1,656 |
| Herringbone (20% waste) | 72 | 864 lf | $1,728 |
Planning a 14' x 24' Deck
A 14' x 24' deck provides 336 sq ft of outdoor living space. At this size, the deck can accommodate multiple functional zones including dining, cooking, and lounging. At this scale, consider using different board patterns or subtle level changes to visually define separate areas. A well-designed medium-to-large deck significantly extends your usable living space and adds substantial value to your home.
For a deck of this size, the structural framework requires 12 joists (2x10 lumber, 288 linear feet total), 4 doubled beams spanning the 14-foot width, and 12 support posts set in concrete footings. Because the joist span is 24 feet, which exceeds 12 feet, 2x10 joists are recommended to prevent deflection and ensure a solid feel underfoot.
The total material cost for this deck ranges from approximately $7,107 using pressure-treated pine to $10,275 with premium decking materials. Professional installation adds approximately $8,400 at a typical rate of $25 per square foot. Many homeowners choose to DIY the construction to save on labor costs, which is feasible for experienced builders with this size deck, though permits and inspections may still be required by your local jurisdiction.
Frequently Asked Questions
How many boards do I need for a 14' x 24' deck?
For a 14' x 24' deck (336 sq ft), you need approximately 66 boards using standard 5.5" x 12' pressure-treated lumber with a perpendicular pattern (10% waste factor). If you choose a diagonal pattern, increase that to about 69 boards, or 72 boards for a herringbone pattern. The exact count varies by board length and width; longer boards mean fewer pieces but potentially more waste on cuts.
How much does a 14' x 24' deck cost to build?
Material costs for a 14' x 24' deck range from approximately $7,107 with pressure-treated pine to $10,275 with premium materials like ipe or PVC, including framing, hardware, railing, and stairs. Adding professional labor at approximately $25 per square foot brings the total installed cost to between $15,507 and $18,675 depending on material choice and local labor rates.
What joist size should I use for a 14' x 24' deck?
For a 14' x 24' deck with joists spanning 24 feet, use 2x10 joists at 16 inches on center. 2x10 joists are recommended because the span exceeds 12 feet. You will need 12 joists totaling 288 linear feet. Always use pressure-treated lumber for structural components and verify your local building code requirements.