What a Pool Safety Inspector Checks

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An inspector measures rather than judges. For a barrier under 1800mm they check a continuous 900mm non-climbable zone outside it and 300mm inside, a barrier at least 1200mm above finished ground level, and no gap between vertical members over 100mm. The certificate that follows is valid for 2 to 4 years depending on the state, and a NSW inspection is capped at $150.

The short answer

900mm continuous non-climbable zone outside the barrier; 300mm inside, for a barrier under 1800mm.
1200mm minimum barrier height above finished ground level — and 'finished' changes if you build up a garden bed.
100mm maximum gap between vertical members, and the ground below must be solid, not mulch or loose sand.
Where horizontals fall inside the 900mm zone, the vertical gaps tighten to 10mm, or a 60-degree fillet is used.
A barrier at least 1800mm high can instead carry the 900mm zone on the inside, measured from the top.

The measurements an inspection turns on
Element	Requirement	How to pre-check it
Non-climbable zone, outside	Continuous 900mm arc, clear	Swing a 900mm tape from the top of the barrier outward, all the way round
Non-climbable zone, inside	300mm for a barrier under 1800mm	Same measurement, pool side
Barrier height	At least 1200mm above finished ground level	Measure at the lowest point of ground on the outside, not the highest
Gaps between verticals	No more than 100mm	A 100mm object should not pass between any two members
Horizontals inside the zone	Vertical gaps no more than 10mm, or a fillet of 60 degrees or more	Look for climbable rails within 900mm of the top
Ground beneath the barrier	Solid — not sand or garden mulch	A child can move mulch to create a gap greater than 100mm
Windows and doors into the pool area	Restrained so they cannot open more than 100mm	Check every opening that gives onto the pool

The zone is the item that fails, not the fence

The non-climbable zone is a 900mm arc measured from the top of the barrier, outward, and it has to be continuous. Nothing that could give a foothold may sit inside it. The QBCC's own list of what breaks it includes barbecues, furniture, trees, pot plants, rockeries and raised garden beds.

That is why barriers that passed three years ago fail now with no work done to them at all: the garden grew, or a chair moved. Walking the perimeter with a 900mm tape is a ten-minute job and it clears the most common failure before you pay anyone.

The inside zone is 300mm for a barrier under 1800mm. A barrier of at least 1800mm can carry the 900mm zone on the inside instead, measured from the top — a different design with different implications for what you can plant.

Height is measured from where the ground actually is

The barrier must be at least 1200mm above finished ground level. The trap is that finished ground level is what the ground is now, not what it was when the fence went up. Top-dressing the lawn, building a raised bed against the fence, or laying new paving all reduce the effective height, and enough of it turns a compliant barrier into a non-compliant one.

Measure at the lowest point on the outside of the barrier. That is where a child would stand.

Landscaping is where most of this goes wrong, and the pool landscaping guide is largely about not undoing your own barrier while making the yard nicer.

The gate is the mechanical half of the inspection

Everything else is a measurement; the gate is a test. It must self-close from any position and latch without help, the latch must be out of reach, and it must not be propped, wedged or held. Hinges drop over time and latches wear, which is why a gate that worked last summer is the single most common finding.

Test it yourself: open it fully, let it go, and do nothing. Then open it 100mm and do the same. If it does not latch on its own both times, that is a finding.

If it fails, this is usually the cheapest possible fix — see what happens if the pool fails for the re-inspection costs, which are capped at $100 in New South Wales.

Who is allowed to do the inspection

It differs by state, and it is not a matter of preference. In Queensland only a licensed pool safety inspector may issue a pool safety certificate — the council cannot. In New South Wales a council or a registered private certifier may. In Victoria a registered inspector issues the certificate of barrier compliance, which must then be lodged with the council within 30 days. Western Australia runs no certificate scheme at all, and local government inspects on a cycle of no more than four years.

How long a certificate lasts sets out the validity periods, and the state-by-state rules compare the regimes.

Common questions

What is the non-climbable zone measurement?

For a barrier under 1800mm it is a continuous 900mm zone outside and 300mm inside, and for a barrier of at least 1800mm a 900mm zone may sit on the inside measured from the top — per the QBCC's non-climbable zones guidance.

Can I inspect my own pool barrier?

You can check every measurement yourself, and you should — but you cannot certify it. The certificate has to come from the person your state authorises, which in Queensland means a licensed pool safety inspector and in New South Wales a council or registered certifier.

Does a garden bed against the fence really fail an inspection?

It can, twice over: a raised bed is on the QBCC's list of things that break the non-climbable zone, and building the ground up against a barrier reduces its height below the 1200mm minimum measured from finished ground level.

What about the pool gate hinges?

Self-closing and self-latching from any position is the requirement, and hinges that have dropped are the most common mechanical failure. Test it by letting the gate go from fully open and from 100mm — with no hand on it at all.

Sources

General information only, current at 2026-09-10. Pool rules differ by state and by council, and penalty amounts are updated regularly. Confirm your own obligations with your council or a registered inspector before acting.

What does a pool safety inspector actually check?