Cost to Build a Deck – 2020 Average Prices & Cost Calculator

Building a deck can add valuable outdoor living space to your home. We'll cover several options to consider when installing a deck and the cost of each in detail below.

New Deck Cost Calculator

Enter the size of your project and select the material and services you're interested in to estimate the cost of the project using 2020 price data. Continue reading below to learn more about what to expect for a new deck project.

optionally calculate pricing for your local area
Estimated Project Cost
Estimate per Square Foot
Estimated Project Total
Compare to Average 2020 Prices
National Average Price
Typical Price Range
$4,000 - $12,000
Minimum Price
Maximum Price
Average Price (per square foot)
Typical Price Range (per square foot)
$20 - $50

How Much Does a New Deck Cost?

Often, adding a deck is significantly less expensive to add outdoor living space with a deck than it is to add an addition to your home.

Adding a deck can add significant value to your home as well. The average cost of building a deck is about $20 – $50 per square foot, and most spend $4,000 to $12,000 to build one.

There are several things to consider when establishing a budget for your project to help get a more precise estimate.

newly installed deck with redwood flooring and balusters

How Much Does a Deck Cost

Several factors contribute to the cost of a deck, and they must be considered to estimate the cost. Perhaps the most important factor is the size.[1] The actual square footage directly affects how much materials are needed and thus the cost. Decks are often estimated by the square foot, however there are other very important factors to consider.

Deck Height

Height is another factor that affects the cost of building a deck. The higher elevation adds additional danger and complexity to the installation.[2] Decks that are high in the air also require extra post length.

Decks that are a story off the ground need a larger set of stairs and longer posts than a deck that is near the ground. Stairs are a costly addition to a deck, so consider that adding them will increase the overall cost.

Adding stairs to a second-story deck will increase the cost by about $1,500 on average.

Deck Railings

Deck railings are another cost factor, and choosing a more expensive railing option will affect the cost of the deck. For example, a fine clear glass rail will be significantly more costly than a pressure treated pre-fabricated rail. The cost of the railing includes the cost of posts, rails, and balusters.

If you’re estimating the cost of a railing check out our baluster calculator.

Decking Material

The choice of flooring is a major factor when estimating the price of a new deck. Wood decks often cost $45 per square foot[3] while composite decks often cost $62 per square foot.[4] The cost of the flooring material itself is not that much of course, and will vary depending on the type of material you choose to use.

Some materials also require less maintenance which helps offset the cost over the long run. See our deck flooring calculator to estimate how much flooring material you’ll need for your deck.

Pressure Treated Flooring

Pressure treated wood decking costs on average $2 per square foot. Pressure treated wood is cost effective, long-lasting, and naturally insect resistant. They do require additional maintenance and frequent staining, and need galvanized fasteners to prevent corrosion.

Pressure treated pine deck flooring

Cedar Flooring

Cedar wood decking costs $4 per square foot on average. Cedar is also cost effective, beautiful, long-lasting, and naturally insect resistant. They do require additional maintenance and frequent staining, but do not need galvanized fasteners.

Western red cedar deck flooring

Redwood Flooring

Redwood wood decking costs around $7 per square foot. Redwood is beautiful, very long-lasting, does not warp, and accepts stain very well. Redwood is quite a bit more expensive than pressure treated or cedar.

Redwood deck flooring

Composite Flooring

Composite decking usually costs around $8 – $10 per square foot. Composite is very durable, looks great, and requires virtually no maintenance. Composite is on the more expensive end of material choices, but since it does not require stain there is some cost savings over the long run. There are many types of plastic and composite decking that vary in cost.

Brown composite deck flooring

Design Complexity

The design of the deck will determine how much labor is needed to install it. More complex designs take more time to install and will thus cost a bit more. Complex designs require more planning and layout, more cuts, and may have more wasted material.

Labor Costs

The area you live in will also impact the cost of building a deck. Labor costs vary by region, and labor amounts to the majority of the cost of a deck.[5]

Geographic Location

Code requirements also vary by region, which will impact the amount of structure needed for the deck. For instance, colder climates require larger footings that need to be buried below the frost line, which increases the cost.

Deck Removal

If you need to remove your old deck there will be some costs involved. Removal can cost anywhere from $500 – $1000 on average. You may be able to do some of this yourself if you choose, but it can be a very difficult job. Also consider that the removed waste material will need to be disposed of.

Estimating Deck Costs

After you have considered the above factors you may be pretty close to figuring out how much your deck will cost. There are some other factors to consider to get a detailed estimate such as footings, inspections, lighting, heaters, and other features.

Consider requesting a professional estimate for your project. Our professionals can give you an accurate estimate and more specific pricing for your local area. Also consider that the information above is very general and your deck costs may vary depending on your home and your location.

All pricing information on this page is based on average industry costs, and is subject to variance for project-specific materials, labor rates, and requirements.


  1. Decks R Us, How Much Does a Deck Cost?,
  2. Emily Beach, The Average Cost for a 2nd Story Deck, SFGate,
  3. Remodeling, Deck Addition | Wood,
  4. Remodeling, Deck Addition | Composite,
  5. Beth Buczynski, The Cost to Build a Deck: 4 Ways to Save, NerdWallet,