How to Build a Floating Backyard Deck: Step-by-Step Guide

Margaret Jul 01, 2026

Transform your backyard into a serene oasis with a floating deck, a stunning and functional addition that seems to hover above the ground. This guide will walk you through the process of building a floating backyard deck, from planning to completion, ensuring you create a beautiful and safe outdoor space.

DIY Floating Deck Tutorial | Easy Backyard Deck Build
DIY Floating Deck Tutorial | Easy Backyard Deck Build

Before you start, it's crucial to check local building codes and obtain any necessary permits. Also, consider the size, shape, and materials that best suit your backyard and personal style.

How to Build a Cheap Ground-Level Deck
How to Build a Cheap Ground-Level Deck

Planning Your Floating Deck

Start by determining the size and shape of your floating deck. Consider the available space, your needs, and the local building codes. A common size is 10' x 12', but you can adjust this to fit your backyard.

How to Build a Low Deck on Budget
How to Build a Low Deck on Budget

Next, choose the materials. Pressure-treated lumber is a popular choice due to its durability and affordability. Composite materials are low-maintenance but more expensive.

Designing the Deck Layout

How To Frame & Build A Floating Deck.
How To Frame & Build A Floating Deck.

Sketch your deck layout, including the location of stairs, railings, and any built-in features like benches or planters. Ensure the design is functional and aesthetically pleasing.

Consider incorporating built-in seating or a built-in bench to maximize your deck's functionality. You can also add a pergola or shade structure for added comfort and style.

Gathering Tools and Materials

How to Build a Floating Deck - House by the Bay Design
How to Build a Floating Deck - House by the Bay Design

Before you begin construction, gather all the necessary tools and materials. You'll need a tape measure, circular saw, drill, level, hammer, screws, and other hardware. Also, ensure you have safety gear, including gloves, safety glasses, and ear protection.

For the floating effect, you'll need adjustable deck blocks or post bases that allow the deck to sit above the ground. These can be found at most home improvement stores.

Building the Floating Deck

a woman working on a deck with the words how i built a deck by my self for less than $ 500
a woman working on a deck with the words how i built a deck by my self for less than $ 500

Start by laying out the perimeter of your deck using stakes and strings. This will serve as a guide as you build.

Next, install the adjustable deck blocks or post bases along the perimeter, ensuring they are level and evenly spaced. These will support the weight of the deck and create the floating effect.

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a wooden bed frame in front of a white fence and flower potted planter
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two men working on a wooden deck in front of a house
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3 Lessons Learned by Building The Spruce's Floating Deck (Under $300) - Everyday Old House

Installing the Joists

Cut and install the joists, which are the horizontal supports that will hold the decking boards. Space them evenly, typically 16" on center, and secure them to the adjustable blocks with screws.

Ensure the joists are level and square to the perimeter. You can use a string line and a level to check this as you go.

Laying the Decking Boards

Start at one corner and lay the first decking board, securing it to the joists with screws. Ensure it is square and level. Continue laying boards, staggering the joints for added strength and stability.

Once all the decking boards are laid, you can install any built-in features, such as benches or planters. Also, install railings if your deck is more than 30" off the ground.

Finishing Touches

Apply a finish to protect your deck from the elements. This can be a stain, sealant, or paint, depending on the material you used. Always follow the manufacturer's instructions for the best results.

Allow the finish to dry completely before using your new floating deck. This typically takes 24-48 hours, but always check the specific product instructions.

Your new floating deck is now ready to be enjoyed! Invite friends and family over, host BBQs, or simply relax and enjoy the beauty of your backyard. Regular maintenance, such as cleaning and reapplying finish as needed, will keep your deck looking its best for years to come.