Cost to Build a 12×20 Deck

Building a 12×20 deck can be a good decision if you want to enjoy the summer outside with your family and friends. It is important to know what is needed to build a 12×20 deck. The size of the deck depends on how many people will use it and what kind of activities they will engage in while on the deck. It’s also important to consider whether or not you have enough room in your yard for a larger deck.

The size of your deck should also match the style of your house, as this will help make sure that the deck looks great when it’s finished being built. You may even want to consider adding some extra features such as outdoor lighting or an outdoor fireplace if you have room available during construction time.

If you’re looking to build a 12-by-20-foot deck, you’ll want to keep several factors in mind. First, you’ll need wood. Then, you’ll need supplies. Then, you’ll need a pattern and some hot tubs. All of these factors can increase the cost of your deck project.


The woods cost to build a 12×20 deck will vary based on several factors, including the size of the deck, the materials used, and the level of craftsmanship. If you are planning to build a large deck, you should ask for several estimates before making a final decision. However, you should never rely solely on online estimates. It is always better to get estimates from reputable companies who will visit your home to make accurate measurements and to check for any obstacles that may affect the deck layout. Also, ask them if they are licensed and insured to work on your project.

A deck is generally constructed of three layers: a ledger, a frame, and joists. When deciding on a wood type, consider the amount of work it requires to install the wood. The frame of a deck consists of post and beam constructions, which are connected to each other. This foundation provides support for the joists and decking. The decking material should be matched to the home’s exterior.

The beams that support the floor system are called rim joists. They are attached to each other on each side of a ledger. These beams are made from the same lumber as the joists. Beams may be made up of two pieces of lumber or a single beam. The length and spacing of these rim joists depends on the design of your deck.


In order to construct a twelve-foot-square deck, you will need some supplies. The first thing you will need is a footing. This piece of lumber is used to secure the joists to the deck. To determine how much concrete to purchase, multiply half the diameter of the hole by itself and then multiply that number by 3.14 to get the volume of concrete that you will need.

Next, you’ll need a saw. The best saw for building a deck is a circular one with a carbide-tipped blade. If you’re working in tight spaces, you may want to use a saber saw. Jigsaws are best for demolition and carving, while a worksite saw will allow you to rip boards to a desired width quickly. Alternatively, you can purchase a power miter saw to get precise crosscuts.

Before you begin, you must first decide what kind of deck you want. You can build a ground-level deck or a raised concrete deck. If you want to maximize your outdoor space, you can also choose a multi-level deck. You should also use painters’ tape to outline where you want the deck to be.

Once you know the dimensions of your deck, you can then start shopping for supplies to build a 12×20 deck. Make sure you know how many joists you’ll need and the amount of decking you need. Next, decide on what kind of railings and stairs you’ll need. Remember to check local codes before buying railings and stairs.


The cost to build a 12×20 deck will depend on many factors, including the size of your yard, the type of materials, and your local building codes. You will also need to take into account a building permit, which can range from a few hundred dollars to a few thousand dollars. Permits are usually cheaper in smaller towns, while the most expensive permits will be found in large cities.

If you want to save money, try scheduling your deck installation during the off-season. Because deck construction is most popular during the warmer months, scheduling it in the off-season will result in lower labor rates and faster scheduling. Make sure that your contractor is licensed and insured. If you plan to hire a contractor, ask them to come out to your home to get an accurate measurement of the area and any obstacles that may affect the layout of the deck.

Make a list of your wants and must-haves for your new deck. The style of your new deck should match the aesthetics and function of your home. Also, take into account the size and value of your home. A small, minimalist deck will look odd next to a huge, luxurious home. Similarly, a large, elaborate deck with many personal features would not make sense next to a tiny, cramped house. Hire a professional contractor who can incorporate the features you want into the design.

When building your deck, make sure you consider the materials you choose. You should choose wood that will be able to withstand the elements. Redwood, for example, is a common material, but it is susceptible to sun damage, and it can cost up to $7 per square foot. Another popular choice for a deck is Ipe, a Brazilian hardwood that can cost from $10 to $15 per square foot. Although it is a more expensive wood to work with, it is resistant to rot and mold.

Hot tubs

Installing a hot tub on a 12×20 deck can cost anywhere from $650 to $6,100. The cost of a hot tub installation includes the cost of the hot tub, the deck skirting, and the installation. Above-ground hot tubs cost the least, and are the most popular option. These types of hot tubs sit above the ground and require no maintenance other than plugging and filling.

In-ground hot tubs are similar to above-ground pools, but sit below the surface of the deck. They often feature architectural features surrounding them. In-ground hot tubs cannot be moved, so they must be installed in a permanent location. Because in-ground hot tubs are permanent, homeowners need to plan the landscaping around them carefully.

When installing hot tubs on a concrete slab, it is important to install electrical wiring in conduit before pouring the concrete. Some builders recommend installing hot tubs between 17 and 24 inches above the decking surface. This allows guests to sit on the rim or swing in a circle. If you are installing a hot tub on a deck, you will likely also need stairs or raised decking. Railings and stairs require more materials and take more time to install than deck planking.

When deciding which hot tubs and deck materials to purchase, take your time to research the different brands. Visit reputable dealers and check out their websites. Try to test-drive them to see how they feel. It’s also important to consider the ongoing maintenance and warranty coverage that comes with the tub. You also need to consider any delivery and installation challenges before making a final decision.


Before you hire a construction company to build your deck, you should get at least three estimates. It’s best to work with a local company because they’ll know the local building codes and will be easier to reach in case of problems. Be sure to check the contractor’s references, experience, and work samples. You should also ask about their insurance coverage. The contractor should have proof of coverage and a certificate of insurance. You can verify this by contacting the insurance company directly.

Permits are another factor that affects the cost. The cost for obtaining permits varies depending on your location. In some regions, it costs about $500 to obtain a building permit, although most contractors will take care of this step for you. In addition, you should also know that you are responsible for the safety of your structure, so you should pay attention to your plans. Moreover, you should work with a professional company that can bring your vision to life.

Having an idea of the costs will help you set a budget. You should also factor in additional costs, such as homeowners insurance. These expenses will help you avoid unpleasant surprises when the project is completed. After all, your main goal for building a deck is to improve your living space and comfort. Aside from these benefits, you may also see an increase in home value.


If you want to build stairs for your deck, you need to take certain measurements before you begin construction. These measurements will help you determine the size of your stair treads and risers. First, you should measure the distance from your deck to the landing. This distance will determine how tall your stair treads should be and how long your stringers should be. Next, you should measure the length of each stringer and its riser. You can use a carpenter’s square to do this.

Next, you need to determine the number of joists needed for the staircase. The deck joists should be spaced on 12″ centers or 16″ centers. This will help your deck support more weight and prevent it from sagging over time. To calculate the amount of joists required, divide the dimensions of your deck by 12″ and multiply the number of stairs by 12″. Also, remember that stairs receive extra weight and vibrations and will require extra support. That’s why it’s important to have footers at each corner of the stairs, and two-foot-separate footers for long stairs.

Another important factor to consider is the cost. Adding stairs to a deck typically costs about $150 more. You may not need to add stairs on both sides of the deck, and one set may be enough. The cost will depend on how many steps you need, how steep they are, and the length of the vertical space between each step and riser. Adding a concrete footing for each set of stairs will add another $50 to your total cost.

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