Trex® Deck Design Tool & Online Deck Planner

Discover The Possibilities With Our Deck Designer Software

Trex makes it simple to design a deck you'll love from the comfort of your home. We've taken care of everything, from designing your deck to creating your shopping list—the Trex Deck Designer tool allows you to handpick every element of your new deck.


Compare materials, explore colors, and refine your layout with our free 3D deck design software. Once you've put the final touches on your design, download a shopping list of your materials, share a blueprint with your contractor or local planning office to obtain a permit, and show off your creation on social media!


How to Plan Your Deck with the Trex Digital Deck Builder

A gorgeous deck starts with a great plan. The Trex digital designer tool can help you during the planning stages, too. Here are a few things to consider while you design your dream deck:

Step 1: Size & Use

How do you want to use your deck? Do you plan to do a lot of grilling and entertaining? Or do you just want a small, backyard sanctuary to soak up some sun? How you plan to use your deck will play a role in determining its size and scale.

Step 2: Budget

Do you have a set budget in mind? This will play a role in the size and scope of your deck, and extra features you want to incorporate. When planning your deck, consider not only the cost of materials, but the cost of labor. If you plan to go the DIY route, you may have some extra wiggle room in your budget, but it may take longer to build than if you’d hired a professional. Use the deck design tool to compare pricing on different components and view estimated costs for your deck—both with and without labor factored in.

Step 3: Maintenance & Materials

How much time do you want to spend maintaining your deck—and how often? Composite decking gives you the look of natural wood without the drawbacks. Fade-resistant, rot-resistant, and termite-proof, composite decking requires comparatively less maintenance than wood decking. Once you know what materials you plan to use, the Trex Deck Designer tool can help you create a shopping list for your project. Learn more about Trex vs. wood.

Step 4: Obtaining Proper Permits

In most cases, yes, you will need a permit to build a deck. While adding a deck to a home can increase the value—and enjoyment—of your home, if you haven’t obtained the proper permits, it can be a problem if you ever choose to sell. Once you’re done designing your deck, you can use the Trex Deck Designer to generate a blueprint to take to your local building office to be sure it meets safety codes and to apply for the proper permits. To find the latest building codes and procedures for your area, visit your local government website or contact them directly.

Step 5: Timing

The amount of time it takes to build a deck varies based on a number of factors, including: the size, shape and components of your deck, as well as how many people are building it and the skill level of those involved. For instance, if you want to enjoy your deck during spring and summer months, you’ll want to start obtaining permits during the winter months. Weather conditions may also impact the timing of your project. Wet ground due to rain or cold temperatures can make it difficult to install posts or lay a foundation. Rocky terrain and making sure the ground is level can also increase the time frame toward completion. If you live in an area that has cold winters, you may also need to account for time for the ground to thaw and drain before you can get started. The Trex Deck Designer tool can help you plan ahead so you have plenty of time to enjoy your deck.

Get more Trex tips for planning your deck.

Get Inspired With Deck Design Plans

Need some inspiration for building the perfect deck? Use the best deck planning software! From a simple ground-level deck to sophisticated elevated deck plans, the Trex Deck Designer has a variety of adjustable design plans to get you started with designing your own deck.


I like the degree of control it gives you, the idea that you get to see it and get a feel for it.


Trex Deck Designer FAQs

How Do I Access The Deck Designer Tool?

The Trex Deck Designer Tool can be accessed on a laptop or desktop computer. It is not designed for mobile use.

What Browsers Can I Use the Deck Designer On?

The Trex Deck Designer will work on the most recent versions of:

PC: Edge, Chrome

MAC: Safari

How Do I Find a Trex Contractor To Build My Virtual Deck?

Use the Trex Find a Builder  location on the website to find a list of TrexPro® deck builders and contractors in your area who build Trex decks.

How Can I Find My Previously Saved Designs?

To access your saved deck plans, log into your Trex Deck Designer account with your email and password. Click on My Projects in the top right for a list of saved decks.

My Design Does Not Require Railing. How Do I Remove Railing?

Lower the deck height to 2.5" under the Dimensions tab. Railing is not required at that height.

Can I Change The Size Of My Joists?

Yes. Under the Decking tab, click on Substructure Options. Select your lumber size and/or wood type.

What Do I Do If The Log-In Does Not Recognize My Email/Password?

Verify that the email and password is for the Deck Designer account. This is different from the log-in used for the Trex website.

What Design Options Does the Trex Deck Designer Tool Offer?

You can create a square and/or rectangle-shaped deck. Additionally, you can create a multi-level or second-story deck within the tool.

Does Changing the Height of the Deck Change the Materials List?

Yes, especially if you have stairs.

What If I Have Problems Using The Deck Designer Tool?

For help learning how to use the Deck Designer tool, you can watch our Deck Designer tutorial video. If you are experiencing an issue with an item added to your project, simply delete the item and replace it within the 3D scene. Occasionally, saving the project and reopening the tool can also solve the issue.

Is there an app to see what a deck would look like?

Yes, our free deck AR visualizer tool allows you to virtually “build” a deck in your backyard space. You can download the app on the App Store or Google Play.

Get Help At Every Step With The Trex Deck Designer

From planning the look of your dream deck to project logistics, the Trex Deck Designer can help you at every step of the process. Our free deck designer software can help plan your budget, draft blueprints to present for permit approvals, and even generate a shopping list for materials.


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