How to build low-level outdoor deck and gazebo?

mmikhael87

 hi there I am wanting to put a low level floating deck in the area provided with pictures  can you please refer some information on this would the area need to be excavated a bit as I want this deck to put low as possible with a little step up with securing posts in the ground to support the gazebo that will go on top it,  my measurements for my deck would be 4600 length and 3300 in depth also once deck is completed I’m wanting to put this gazebo on top of the deck so this would need to secured to the deck 

MitchellMc

Welcome to the Bunnings Workshop community @mmikhael87. It's great to have you join us, and many thanks for your question about pergolas.

With the deck being low to the ground, it’s important to know that there’s a bare minimum clearance needed between the ground and the underside of the deck joists to prevent moisture problems. Even if you're aiming for the deck to be as low as possible, you’ll still need to excavate the area underneath to allow space for airflow, drainage, and at least a shallow layer of gravel. Without this, the joists will sit in damp conditions and will likely rot prematurely, especially if you're not using fully treated hardwood or H4-rated timber.

Some people do build ultra-low-level decks directly on the ground or using deck blocks, but these are generally short-lived due to the constant exposure to moisture. If you're going to the effort of building a deck to support a gazebo, it's worth doing it properly to get a longer lifespan out of the structure.

In your case, because you’re also planning to put a gazebo on top of the deck, it might actually be more secure to install concrete footers or piers directly into the ground for the gazebo posts. You can then build the deck around the posts. That way, the structure of the gazebo is independent and doesn’t rely on the deck framing to hold it upright, which is especially useful if you’re in a windy or exposed area.

Just a heads-up too—installing a gazebo, especially one that’s fixed to the ground or a deck, may require council approval. If you’re planning to fix it to the deck rather than directly to footings, you may also need an engineer to certify the attachment method to ensure it complies with local regulations and is safe.

Once you’ve marked out the area and know your exact levels, it’ll be easier to work out how much excavation is needed and what type of footings will work best.

Please let me know if you have any questions.

Mitchell