Pool fence rules, measured the way an inspector measures them

Most people meet these rules the hard way, a fortnight before settlement, when an inspector points at a pot plant. The rules themselves are not complicated. They are just specific, and they are measured with a tape, not judged by eye.

What has to be true of the fence itself?

Queensland's building commission publishes the measurements in the plainest form, and they are the ones an inspector will be working to in that state:

• Height: at least 1200 mm↗, measured from finished ground level to the top of the fence, at every point along the run.
• Gap at the bottom: no more than 100 mm↗ from the ground to the bottom of the barrier.
• Rails: a fence needs at least one gap of 900 mm or more↗ between horizontal rails, so a child cannot use them as a ladder.
• Uprights: where the rails are far enough apart, vertical members can sit up to 100 mm apart↗.
• Close-set rails: if the rails are closer than that, Queensland wants gaps under 10 mm, or a fence over 1800 mm↗ instead.
• Glass panels: ledges on the outside face are 10 mm or less↗, and the glass must show no sign of fracture.
• Using the neighbour's fence: a dividing fence can do the job at the right height, with nothing climbable within 300 mm on the inside↗.

What has to be true of the gate?

Gates are where barriers fail, because a gate is the only part with moving pieces. Four things get checked:

• It must not open towards the pool↗, so a child leaning on it pushes it shut rather than open.
• It must self-close and self-latch from any open position↗, with no hand on it, including from resting against the latch.
• The release handle sits at least 1500 mm↗, measured to the underside of the handle.
• Hinges are at least 900 mm apart↗, or the lower one gets a safety cap.

If the latch can be reached from inside the pool area, it has to be behind a 450 mm-radius shield↗, with no gaps big enough for small fingers to get through.

What is the non-climbable zone?

It is the empty space that makes the height mean something. A 1.2 m fence with a garden bench beside it is a 600 mm fence. Queensland requires a continuous 900 mm↗ zone, with 900 mm outside the fence↗ and 300 mm inside the fence↗.

The regulator's own list of things to look for is mundane and exactly right: BBQs, furniture, pot plants, trees and garden beds↗. A trampoline moved for summer, a stack of pavers left after a renovation, and the wheelie bin parked in the side passage all belong on it.

Where the space outside simply does not exist, as in a townhouse with a boundary right at the pool, the alternative is a fence of at least 1800 mm↗ with the zone kept clear on the inside instead.

Do these numbers apply in my state?

The barrier requirements come from the same Australian Standard across the country, and New South Wales names it directly: AS 1926.1-2012↗. What changes at the border is not the tape measure. It is who inspects, what the certificate is called, and how often you need one.

We publish Queensland's figures because Queensland publishes them. Victoria's regulator explains the certificate process rather than restating the dimensions on the same page, so we have not put its numbers in its mouth. If you are in Victoria, the inspector measures to the standard that applied when the barrier was built, which is a conversation worth having before you book.

Do spas and blow-up pools need a fence?

Yes, past a certain depth, and the depth is lower than people expect. In New South Wales the law covers anything deeper than 30 cm↗, and the same fencing rules as permanent pools↗. Victoria's rules reach pools and spas holding more than 30 cm of water↗, including inflatables.

Victoria goes one step further with temporary pools. If a relocatable pool stays up for three days or more, the landowner has to register it on or before the fourth day↗. That catches the summer purchase that never quite gets packed away.

Where people actually get caught

Not on height. On the gap under the fence after the garden settles, on a self-closing hinge that lost its spring two summers ago, and on the barbecue that got wheeled to the fence line for a party in January and stayed there. All three are cheap to fix and all three fail an inspection.

If you want the list in the order an inspector works through it, read what fails a pool inspection. If a sale or a lease is what brought you here, the compliance checker gives you your state's version with the deadlines attached.