How to build a deck

A deck is the perfect way to extend your living area to the outdoors and improve the value of your home. Find out how you can build your own deck that you will enjoy for years to come.

1. Make a plan

Before you reach for a hammer there’s a few things you need to consider before building your new deck. Seeking council approval, checking for underground cables and pipes and deciding on the overall design of your deck are just some of the things you need to do before you start building. 

Watch Planning to build a deck

Person cutting a check-out in the wall plate to build a deck

2. Measure and set out your deck

With the planning phase complete, it’s time to set out your deck. This phase is crucial – get your measurements wrong and your deck could end in disaster. Find out how to measure and mark out the height of your deck and ensure that it’s square. 

Watch How to set out a deck

Stumps and bearers installed for building deck

3. Install the stumps and bearers

The building phase begins as we show you how to build a strong foundation for your new deck, starting with the stumps and bearers. 

Watch How to install bearers and stumps for a deck

Person using chisel to make joists for deck

4. Install the joists

With the stumps and bearers in place, the next step in building your deck is to install the joists; these are the beams that will support the decking boards. 

Watch How to install joists for a deck

“Person securing decking with a fastener”

5. Lay the decking

Your deck’s frame is now complete, which means it’s time for the final step – laying the decking boards. 

Watch How to lay decking

“deck with lighting”

More Ideas to Make Your Outdoors Great

Building a deck is the first step in creating a fantastic outdoor space for your home, find out what else you can do to create the perfect entertaining area. Or if you’ve only got a small space to work with, check out these great ideas for small spaces.

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Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.
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