Pressure-Treated Decking Cost

On February 25, 2026 By newsroom Topic: Home Services

Cost

National Average: $4,800–$8,000.
Low-End: $1,500 for small ground-level decks.
High-End: $14,400 for multi-level or large decks.

Cost by Deck Size

| Deck Size (ft.) | Average Cost Range |
|---------------------------|-------------------------|
| 10 x 10 (100 sq. ft.) | $1,500–$2,500 |
| 12 x 12 (144 sq. ft.) | $2,200–$3,600 |
| 14 x 20 (280 sq. ft.) | $4,200–$7,000 |
| 20 x 20 (400 sq. ft.) | $6,000–$10,000 |
| 24 x 24 (576 sq. ft.) | $8,640–$14,400 |

Cost by Deck Type

| Deck Type | Cost per Sq. Ft. | Notes |
|-----------------------|----------------------|-------------------------------------------|
| Ground-Level | $15–$25 | Simple, attached to the house. |
| Floating (Freestanding)| $20–$60 | Requires extra framing for stability. |
| Second-Story (Raised) | $40–$50 | Includes foundation and support posts. |
| Multi-Level | $30–$75 | Complex designs, stairs, and materials. |

Key Factors Affecting Costs

Materials:
Pressure-treated wood costs $15–$25 per square foot.
Premium grades increase material costs by ~30%.
Labor:
Labor accounts for 70% of the total cost.
Expect $15–$35 per square foot for professional installation.
Preparation:
Foundation costs: $25–$300 per post, depending on deck type.
Location:
Raised decks or those in areas with challenging terrain or high labor costs can increase prices.

Additional Costs to Consider

Maintenance:
Sealing: $0.75–$4 per sq. ft. every 1–2 years.
Regular cleaning and inspections can prevent costly repairs.
Repairs:
Average: $800–$3,200.
Replacement boards: $10–$20 per sq. ft..
Insurance:
A new deck may raise your homeowner’s insurance premium—check with your provider.

Cost to DIY vs. Hire a Contractor

DIY Savings:
Avoid 70% labor costs, saving $1,750–$7,000 depending on deck size.
Risks include incorrect installations or safety hazards.
Hiring a Pro:
Ensures adherence to local building codes and quality craftsmanship.
Average labor rates: $15–$35 per square foot.

Popular Add-Ons and Their Costs

| Add-On | Cost Range |
|---------------------------|-------------------------|
| Deck Stairs (per step) | $100–$200 |
| Landscape Lighting | $2,000–$6,000 |
| Fire Pit | $200–$3,000 |
| Outdoor Furniture | $200–$1,800 |
| Retractable Awning | $2,000–$3,500 |

10 Ways to Save on Your Deck Project

Build a smaller deck.
Use lower-grade wood for low-traffic areas.
Opt for ground-level designs to minimize structural needs.
Use standard board lengths to reduce waste.
Compare multiple installation quotes.
DIY some or all of the project (if skilled).
Buy materials in bulk.
Watch for seasonal sales.
Build during the off-season (e.g., late fall).
Maintain your deck to avoid costly future repairs.

Pro Tip: A pressure-treated deck combines affordability and durability, lasting 40–50 years with proper maintenance.