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.

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