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How Much Does It Cost to Build a Deck?

$25 - $50
cost to build a deck per square foot
$3,500 - $7,500
average cost to build a deck (12'x12')
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Key Takeaways

Key PointDetails
Cost Per Square Foot Installed$25 – $50
Average Cost to Build a 12’x12′ Deck$3,500 – $7,500
Average Cost to Build a 20’x20′ Deck$10,000 – $20,000
National Average Cost$15,000
Minimum Cost$2,000
Maximum Cost$30,000

Building a deck can enhance your outdoor living space and add value to your home. Understanding the costs involved can help you plan your deck construction project effectively.

Cost to Build a Deck

The cost to build a deck varies based on the size and type of the deck. Below is a breakdown of average costs:

Cost to Build a Deck by Size

Deck Size (Feet)Square FeetAverage Cost Installed*
8’x10′80$2,000 – $4,000
10’x10′100$2,500 – $5,000
10’x12′120$3,000 – $6,000
12’x12′144$3,600 – $7,200
12’x14′168$4,200 – $8,400
12’x16′192$4,800 – $9,600
12’x18′216$5,400 – $10,800
12’x20′240$6,000 – $12,000
14’x20′280$7,000 – $14,000
16’x16′256$6,400 – $12,800
20’x20′400$10,000 – $20,000
20’x24′480$12,000 – $24,000
24’x24′576$14,400 – $28,800

New Deck Cost by Material

The material you choose for your deck significantly affects the overall cost.

MaterialCost Per Square Foot Installed*
Pressure-treated pine wood$25 – $50
Ipe$50 – $70
Cedar$30 – $47
Redwood$28 – $54
Tigerwood$40 – $64
Mahogany$30 – $57
Bamboo$27 – $52
Composite$40 – $80
Trex composite$45 – $70
Aluminum$100 – $125

Pressure-Treated Pine Wood

Pressure-treated pine wood is a cost-effective option for decks, offering durability and resistance to insects and rot.


Ipe is a premium hardwood known for its durability and natural resistance to decay and insects, making it an excellent choice for high-end decks.


Cedar is a popular choice for decking due to its natural beauty and resistance to rot and insects.


Redwood offers a rich color and natural resistance to decay, making it a durable and attractive option for decks.


Tigerwood is a dense and durable hardwood with a striking grain pattern, providing both beauty and longevity for decks.


Mahogany is a hardwood that offers a rich, warm appearance and excellent durability, making it a popular choice for high-end decks.


Bamboo is a sustainable and durable option for decking, known for its strength and resistance to insects and rot.


Composite decking is made from a blend of wood fibers and plastic, offering low maintenance and long-lasting durability.

Trex Composite

Trex composite is a high-end composite decking material known for its durability, low maintenance, and wide range of colors and finishes.


Aluminum decking is highly durable, low maintenance, and resistant to rot, insects, and weather, but it is one of the most expensive options.

Deck Building Cost by Type

Different types of decks come with varying costs, depending on their construction and design.

Deck Design TypeCost Per Square Foot Installed*
Ground-level / platform$25 – $30
Detached / floating$20 – $25
Elevated$30 – $50
Second story$50 – $60
Multi-level$60 – $100

Ground-Level or Platform Deck

Ground-level decks are attached to the house and typically rest on a foundation close to the ground. They are cost-effective and easy to build.

Detached or Floating Deck

Detached or floating decks are freestanding structures that do not attach to the house. They are usually less expensive and can be placed anywhere in the yard.

Elevated Deck

Elevated decks are raised above the ground and often include stairs and railings. They offer a higher vantage point and are ideal for homes with sloped yards.

Second-Story Deck

Second-story decks are attached to the upper level of the house and provide additional outdoor living space with a view. They are more complex and costly to build.

Multi-Level Deck

Multi-level decks feature multiple levels connected by stairs, offering a dynamic and versatile outdoor space. They are more expensive due to the complexity of the design.

Deck Cost Estimator

Several factors influence the overall cost of building a deck, including materials, labor, and additional features.

FactorCost Per Square Foot* (New Install)Cost Per Square Foot* (Replacement)
Materials$14 – $28$27 – $30
Labor$11 – $22$13 – $25

| Total Cost to Install | $25 – $50 per square foot | $30 – $55 per square foot |

Features & Customizations

Custom features and add-ons can enhance the functionality and appearance of your deck but will also increase the overall cost.

DIY Cost to Build a Deck Yourself

Building a deck yourself can save on labor costs, but it requires time, skill, and the right tools. The cost of materials and tools should be considered when planning a DIY deck project.

Deck Building FAQs

Does Building a Deck Add Value to Your Home?

Yes, building a deck can add significant value to your home. A well-designed and constructed deck enhances outdoor living space, making your home more attractive to potential buyers.

How Long Does It Take to Build a Deck?

The time it takes to build a deck depends on its size and complexity. On average, it can take anywhere from a few days to a few weeks to complete a deck.

How Long Does a Deck Last?

The lifespan of a deck depends on the materials used and the level of maintenance. A well-maintained wood deck can last 10-15 years, while composite and aluminum decks can last 25-30 years or more.

Should I Repair or Replace My Deck?

If your deck has minor damage or wear, repairs may be sufficient. However, if the structure is significantly damaged or deteriorated, replacing the deck may be a better option.

Can I Build a Deck Directly on the Ground?

Building a deck directly on the ground is possible with a ground-level or platform deck. However, proper drainage and a solid foundation are essential to prevent moisture issues and ensure longevity.

Does Building a Deck Increase Property Taxes?

Building a deck may increase your property taxes, as it can add to the assessed value of your home. It’s important to check with your local tax assessor’s office to understand the potential impact on your property taxes.

Getting Estimates from Deck Contractors

When seeking estimates for your deck construction, consider the following tips:

  1. Get Multiple Quotes: Compare prices and services from different contractors.
  2. Check References: Look for reviews and testimonials from previous clients.
  3. Verify Credentials: Ensure the contractor is licensed, insured, and experienced in deck construction.
  4. Ask About Customization: See if they offer custom solutions to meet your specific needs.

Questions to Ask Deck Contractors

  • How long have you been in business?
  • Can you provide references from similar projects?
  • What services are included in your standard package?
  • Do you offer any specialized deck designs?
  • What are your rates for additional services?
  • How do you handle unexpected issues or additional requests?

Cost to Build a Deck Summary

Building a deck can enhance your outdoor living space and add value to your home. By understanding the costs, benefits, and available options, you can make an informed decision that meets your needs and budget.

For more information on deck construction and to explore other cost-related guides, visit our detailed articles on home improvement cost and patio construction cost.

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