How Much Does It Cost to Build a Deck?
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A deck can expand an outdoor living space to create warm-weather enjoyment, but how much does it cost to build a deck? Typically, it costs between $4,141 and $11,713, with a national average of $7,913.
Highlights
- The typical cost range for building a deck is $4,141 to $11,713, though the national average cost is $7,913.
- The main cost factors in building a deck include deck size, materials, foundation, and labor and permits.
- Homeowners may choose to build a deck to replace a damaged one, increase home value, improve aesthetics, increase storage, decrease landscaping costs, or provide space for entertaining.
- Building a deck is a complex project best left to professional contractors. DIY deck building is only an option for skilled and experienced homeowners who are confident they can produce a safe structure.
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A great backyard can become even more appealing with a beautiful deck on which to enjoy barbecues, fire pits, and family gatherings in the summer. If a homeowner decides a deck is the perfect addition to their backyard, they may be wondering, “How much does it cost to build a deck?” Several design factors affect the overall price of a deck, particularly size, materials, structural requirements, deck design, extra features, and more. According to Angi and HomeAdvisor, the average cost to build a deck is $7,913, or between $4,141 and $11,713. This cost quickly translates to a boost in property value.
Homeowners who are interested in building a deck can use this guide to better understand the cost factors that go into the total price of a deck, the types of deck options available, the benefits of building a deck, the pros and cons of DIY deck building versus hiring a pro, some ways to save money on this project, and questions to ask potential contractors before hiring someone.
Factors in Calculating the Cost to Build a Deck
The cost to build a deck is largely dependent on the size and complexity of the deck plan and design. Materials, design style, and foundation requirements can also affect how much it costs to build a deck. These factors are explored in more detail below.
Deck Size
Size is a major contributing factor to the overall cost of a new deck. A small 8-foot by 10-foot deck requires fewer materials and labor and will cost $2,400 to $4,800. On the other hand, a 16-foot by 20-foot deck will cost $9,600 to $19,200. Most homeowners can expect to pay $30 to $60 per square foot when building a deck. Any special features, additions, and stories will add to this cost.
Deck Material
The average cost of decking material ranges from $2 to $45 per square foot. There are three common choices of materials: wood, composite, and plastic. Pressure-treated wood costs between $15 and $25 per square foot. If wood is the chosen material, homeowners will want to remember to also factor in the cost of staining the deck or the cost of painting the deck. Composite decks cost between $4 and $12 per square foot for material, while brand-name Trex decking costs $5 to $10 per square foot and metal decking costs about $15 to $20 per square foot.
| Material | Cost per Square Foot (Materials Only) |
| Aluminum or metal | $15 to $20 |
| Bamboo | $3 to $10 |
| Cedar | $4 to $9 |
| Composite | $4 to $12 |
| Ipe | $5 to $20 |
| Mahogany | $8 to $11 |
| Pressure-treated | $15 to $25 |
| Redwood | $4 to $6 |
| Tigerwood | $7 to $15 |
| Trex | $5 to $10 |
Deck Design
Complex designs that include multiple levels, elaborate railings, built-in benches or grills, or a deck built on a second story will increase the overall cost of a backyard deck. For instance, a wraparound deck will likely have a higher cost to build than a simple one-level deck on the back of the house.
Foundation
Decks that are expected to hold additional weight like a hot tub will require significant support structures with poured concrete footings. Raised decks require additional beams and footings for security, but small decks attached to the home may need only concrete blocks. The average labor cost to install a deck foundation is $25 to $300 per post.
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Labor and Permits
The labor cost to build a deck per square foot is between $15 and $35. That cost varies based on location, deck size, and materials. If a building permit is required to add a traditional deck as a permanent structure, the average cost is $225 to $500.
Additional Costs and Considerations
After discussing their customized deck requirements with a Lowe’s deck designer or other decking professional, a homeowner may want to add some additional features such as a roof, deck skirting, built-in kitchen, accessories, and more. An existing deck in disrepair may also need to be removed first, which is an additional cost.
Existing Deck Removal
If an existing deck is beyond repair or simply doesn’t suit the homeowner’s style, they’ll need to demolish it before building a new one. In some cases, the footings can be reused and added to, or they may need to be torn out and rebuilt to suit the new deck requirements. The cost to have a professional help remove an existing deck and foundation averages $5 to $15 per square foot.
Seasonality
In some climates, it’s possible to have a deck built in the winter. This may be a preferred option for many homeowners, as decking companies have more time to complete the job since it’s considered off-season. With less construction happening during winter months, building permits may be obtained more quickly, too.
Features and Add-Ons
Adding a roof to a deck can cost an additional $3,000 to $10,000. Installing lighting can range from $8 to $30 per fixture, and enclosing the deck can cost on average $50 per square foot. On average, patio furniture costs up to $500 or more. To make the deck more comfortable year-round, homeowners may consider adding misters ($2,100 to $3,400) or heaters ($100 to $300). Hot tubs can also be added for $650 to $6,100, or an average cost of $3,400.
| Deck Feature | Cost |
| Built-in seating | $100 to $8,000 |
| Electricity | $130 to $300 per outlet |
| Enclosure | $50 per square foot |
| Firepit | $100 to $2,000 |
| Furniture | $500+ |
| Heater | $100 to $300 |
| Hot Tub | $650 to $6,100 |
| Misters | $1,800 to $3,100 |
| Outdoor lighting | $8 to $30 per fixture |
| Planters | $10 to $1,000 apiece |
| Roof | $3,000 to $10,000 |
| Walkways | $1,200 to $2,400 |
Deck Skirting
For raised decks, an appealing way to cover the empty space below the deck is to install deck skirting. Skirting can cost anywhere from $2 to $50 per linear foot. Materials for deck skirting vary from lattice to metal, wood, or vinyl sheets.
Electrical Work
It’s helpful to have power outlets available on a deck, particularly if it’s a freestanding deck away from the house. Deck professionals often have electricians who can run power safely to multiple points on the deck. Homeowners can expect to pay about $130 to $300 per outlet. If the homeowner has plans to install a hot tub, they’ll want to make sure they notify the electrician of the power requirements.
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Deck Railings and Stairs
Basic railings are sometimes included in the average cost per square foot, but raised decks, second-story decks, and additional stairs typically cost extra. Railings and stairs take longer to install than deck planking and require more materials. Railings cost about $35 to $210 per linear foot, and stairs run $25 to $50 per stair. The cost per linear foot for common deck railing materials are in the table below.
| Railing Material | Cost per Linear Foot (Material Only) |
| Cable | $115 to $175 |
| Composite | $80 to $165 |
| Glass | $140 to $210 |
| Metal | $55 to $85 |
| Wood | $40 to $60 |
Deck Cover
In regions that receive more rain than others, it’s worth homeowners considering building a covered deck so they can enjoy it throughout the year. Decks can be partially enclosed or roofed to protect from the elements. On average, the cost to enclose or cover a deck is $50 per square foot, though the actual cost could be higher or lower depending on size and materials.
Decking Pattern
Typical square or rectangular decks with straight lines are common choices that won’t cost extra. If a herringbone pattern, diagonal stripes, or any other special pattern is preferred, homeowners can expect to add an additional 20 percent for increased labor and materials.
Maintenance and Repairs
It’s often necessary to do some maintenance to restore a weathered deck a few years after it is built. Composite decks resist weathering and require little maintenance other than regular cleaning. Decks made from natural woods will need to be resanded and stained or sealed against weather at least once a year ($550 to $1,300). Deck waterproofing is also a good idea for wooden decks. Any boards or railings that are significantly damaged will also need to be repaired or replaced, and a professional can help inspect the foundation regularly. Lastly, applying a fresh coat of the best deck paint every couple of years can keep it looking like new.
Cost to Build a Deck by Type of Deck
Building a deck offers a homeowner more options for where and how to design an outdoor living space compared to a patio. While a patio is generally adjacent to a house, a deck can be placed almost anywhere. It can also include multiple levels or be built off the ground completely. Each variation creates complexity and affects the overall costs. The typical costs per square foot for different deck designs are listed below.
| Deck Type | Cost per Square Foot |
| Elevated concrete | $30 to $75 |
| Floating or detached | $20 to $60 |
| Multilevel | $30 to $75 |
| Ground-level | $10 to $20 |
| Second-story | $40 to $50 |
Elevated Concrete
Elevated concrete is a sturdy deck option, but this heavy material is more expensive than some. Once installed, however, concrete decks require very little maintenance. Foundations for elevated concrete decks will need to be made of steel or concrete to support the extra weight. Homeowners can expect to pay about $30 to $75 per square foot for an elevated concrete deck.
Floating or Detached
Floating decks cost on average $20 to $60 per square foot and can be built anywhere on the property without being attached to an existing structure like a home. They sit low to the ground and require additional supports to suspend the decking safely long term. Detached decks are appealing to homeowners who don’t have space available next to their home.
Multilevel
For larger spaces or for decks on uneven ground, a multilevel deck might be an appealing option for homeowners. If a steep terrain in the backyard prevents the space from being usable, creating a wide deck with multiple levels can offer plenty of flat space for entertaining and playing. With a solid foundation, additional railings, and stairs, costs for a multilevel deck average $30 to $75 per square foot.
Ground-Level
Ground-level decks are extremely simple to install because they sit flat on the ground and don’t require foundations, stairs, or framing. In this way, a ground-level deck is essentially a patio. This also makes a ground-level deck the most affordable option at about $10 to $20 per square foot.
Second-Story
Second-story decks are one of the most popular varieties and extend from the second floor of a home. Since they sit higher from the ground, they require stabilizing pillars and a solid foundation. The average cost to install a second-story deck is $40 to $50 per square foot.
Benefits of Building a Deck
Decks are a popular outdoor accessory for homeowners who enjoy spending time outdoors grilling, entertaining, and relaxing. Financially, they’re a great investment, since they help boost the property value. Old decks need to be repaired or replaced to prevent accidents and to increase the total value of the house.
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