PERTHA pool is the most common reason a Perth settlement gets held up
WA pool barrier rules: the 300mm definition, AS 1926.1, the November 2001 threshold, gate and non-climbable-zone traps, four-yearly council inspections
A pool is the single most common reason a Perth settlement gets held up, and it is almost always avoidable. The rules are strict, they are enforced, and they do not grandfather old pools out of them.
What counts as a pool
The law does not care what you call it. Under the WA Building Regulations, a private swimming pool is any pool associated with a dwelling that can hold water more than 300 mm deep and is used, or is capable of being used, for swimming, wading or paddling. That catches in-ground pools, above-ground pools, spas, and inflatable and portable pools. An ornamental pond that people paddle in meets the definition too.
If it holds more than 300 mm and someone could get into it, it needs a compliant barrier. There are almost no exemptions.
The barrier, and the date that changes the rules
A compliant barrier has to meet the Building Code, the relevant edition of AS 1926.1, and the Building Regulations. What "relevant edition" means depends on when the pool went in, and there are two thresholds worth knowing.
Pools installed before 5 November 2001 must restrict access from the house, adjoining properties and the road, and may use a compliant child-resistant door from the house directly into the pool area. Pools built after that generally cannot rely on a house door as part of the barrier — the pool has to be isolated from the dwelling.
The practical points that catch people are smaller than the dates. The barrier has to be permanent, made from durable materials, and not removable without tools. Gates must be self-closing and self-latching, and swing outward, away from the pool. Industry Bulletin 123 deals specifically with the hinges, because a gate that does not reliably close is the most common single failure an inspector finds.
Then there is the non-climbable zone: the space around the barrier has to be clear of anything a small child could use as a foothold. This is the one that quietly goes non-compliant years after the pool passed, because somebody put a pot plant, a coping stone, or a barbecue next to the fence.
Inspections happen whether you ask or not
Every WA local government has to inspect the barrier of every private pool in its district at least once every four years. Since June 2024, a newly installed barrier must be inspected by the local government within 30 days of installation, and a non-compliant one re-inspected within 60 days.
Building and Energy tracks this. Its latest report found around 1.2 per cent of WA pools overdue for inspection at 30 June 2025, and named four metropolitan councils — Wanneroo, East Fremantle, Rockingham and South Perth — as accounting for half of the overdue total. The point for a buyer is simple: your council knows your pool exists, and the clock is running whether or not you are thinking about it.
The penalty, and why it lands at settlement
A non-compliant barrier can attract a $1,000 infringement notice, and a magistrate's court can impose up to $5,000 plus costs. But the sharper problem is timing. A real estate agent has a duty to check the barrier on a property they are selling or leasing and to report suspected non-compliance. Which means the issue frequently surfaces mid-sale, when there is the least time to fix it and the most pressure to.
Where this sits in an inspection
A building inspection under AS 4349.1 covers swimming pool fencing to the extent of noting its presence and obvious condition — the standard lists pool fencing among site items, specifically its presence and whether the gate is self-closing and self-latching. It is not a substitute for a local government compliance inspection, and we say so. What we can tell you is whether the barrier is obviously non-compliant before you buy, which is usually enough to know whether you are inheriting a problem.
If you are buying a property with a pool, this is worth raising early. It is one of the checks that comes up on a pre-purchase inspection, and if you are close to settlement it is on the list for a pre-settlement inspection too — because a barrier that was compliant at the home open can be made non-compliant by nothing more than the sellers leaving a wheelie bin against the fence on their way out.
Why the rules are as strict as they are
Pool barrier requirements can feel disproportionately strict until you remember what they exist to prevent, which is the drowning of young children, and understand how fast and how silently that happens. A small child can drown in moments and without a sound, and the barrier around a pool is the single most effective measure for preventing it, because it puts a physical obstacle between a young child and the water that does not depend on a moment's supervision. The rules are strict, self-closing and self-latching gates, minimum heights, no gaps a small body can pass through, no climbable features that give a toehold, because every one of those requirements addresses a specific way children have actually got past inadequate barriers and drowned. The strictness is not bureaucratic excess; it is the accumulated lesson of preventable tragedies, written into the requirements.
This is why the compliance of a pool barrier is treated as a genuine safety matter rather than a paperwork formality, and why the requirements are enforced through periodic inspection rather than left to the owner's discretion. A barrier that is almost compliant, a gate that does not quite self-latch, a gap slightly too wide, a climbable feature near the fence, is not a minor technical shortfall; it is a barrier with exactly the kind of weakness that the requirements exist to eliminate, because those are the weaknesses through which children have reached the water. The rules leave little room for approximation because the consequence of the barrier failing is not a defect to be repaired but a life.
The date that changes which rules apply
Pool barrier requirements have changed over the years, becoming more stringent as the understanding of how barriers fail has developed, and this means the specific requirements that apply to a given pool can depend on when the pool and its barrier were built or last brought into compliance. An older pool barrier may have been compliant with the rules of its era but fall short of the current requirements, and the question of which standard a particular barrier has to meet is not always simple. What this means in practice is that an older barrier that has never been updated may not meet the current requirements even if it met the requirements when it was installed, and the difference is worth understanding rather than assuming an existing barrier is adequate because it has always been there.
The practical upshot is that the age of a pool and its barrier is a factor in assessing compliance, and an older barrier deserves closer scrutiny against the current requirements rather than the benefit of the doubt. For an owner, this can mean that a barrier they have had for years and never thought about may need work to meet the current standard, particularly if it is being assessed on a sale. For a buyer, it means an older pool barrier is not something to assume is compliant simply because it exists and looks like a fence; it is something to have assessed against the requirements that actually apply.
Why it lands at settlement, and where an inspection fits
Pool barrier compliance has a way of becoming a live issue at the point of sale, because a non-compliant barrier is a problem that tends to surface when a property changes hands and can carry real consequences, including penalty exposure, that a buyer does not want to inherit and a seller is responsible for. A pool barrier that does not meet the requirements is not just a safety concern but a compliance liability, and it is far better identified and addressed before settlement than discovered afterward, when it becomes the new owner's problem to fix and their exposure to manage. This is why pool barrier compliance is worth addressing early in a sale rather than leaving to chance.
A building inspection is not a formal pool barrier compliance certification, which is a specific assessment against the detailed requirements, but an inspection can note the presence of a pool and observe the obvious features and shortcomings of its barrier, flagging where the barrier appears not to meet the requirements or warrants a formal compliance assessment. For a buyer, that flag is the prompt to establish the barrier's compliance status properly before committing, because a non-compliant barrier is both a safety issue and a liability. In a city with as many backyard pools as Perth, the pool barrier is a common and important item, and understanding that its compliance cannot be assumed, particularly on an older pool, is part of buying a property with a pool sensibly rather than inheriting a problem.
Common questions
Does my pool need a fence in WA?
If it can hold water more than 300 mm deep and could be used for swimming, wading or paddling, yes. This includes above-ground, inflatable, portable and spa pools, with almost no exemptions.
How often are pool barriers inspected?
WA local governments must inspect every private pool barrier at least once every four years. Since June 2024 a new barrier must be inspected within 30 days of installation.
What is the penalty for a non-compliant pool barrier?
A $1,000 infringement notice, and a magistrate's court may impose up to $5,000 plus costs.
This comes up on every pre-purchase building inspection and pre-settlement inspection we carry out.
Read next: selling a house in WA? Your battery smoke alarms probably aren't legal and wet areas are the most commonly failed part of a new build.
Sources
Read rather than recalled. Summarised here; the documents themselves are Crown copyright and are linked rather than reproduced.