Pool fencing rules in New Zealand

What has to be fenced

In New Zealand, any residential pool capable of holding water more than 400 mm deep needs a compliant barrier. That covers in-ground pools, above-ground pools and most portable pools that stay set up. The depth it is capable of holding is what counts, not how much water happens to be in it today.

The rules sit in the Building Act 2004, with the barrier requirements set out in the Building Code and its acceptable solutions. Small heated pools such as spas can be treated differently where they have a compliant lockable cover, but a swimming pool does not have that option.

The barrier itself

There are two types of barrier, and which one applies depends on where the fence runs:

• Boundary barrier. Where a boundary fence forms part of the pool barrier, it needs to be 1800 mm high and non-climbable on the pool side.
• Internal barrier. A barrier inside the property must be at least 1200 mm high, measured from the ground on the outside.

The rest of the specifics matter too, because an inspector measures them:

• Gaps must be small enough that a young child cannot get through, which means under 100 mm as a general rule.
• There must be nothing climbable on the outside of the barrier within 1200 mm of it. This is where most fences fail: a retaining wall, a heat pump unit, a planter box, a stack of firewood or a garden tap can all turn a compliant fence into a non-compliant one.

Gates

Gates are the part people get wrong most often, and the part that fails most often in service. A pool gate must be self-closing from any position and self-latching, and it must open away from the pool. The latch has to be positioned so a small child cannot reach it, which in practice means high on the gate or shielded.

A gate propped open with a brick on a hot afternoon is the single most common reason a compliant pool stops being a safe one. The hardware needs to be good enough that nobody wants to prop it.

The three-yearly inspection

Councils are required to inspect residential pool barriers at least once every three years. You will be contacted, an inspector will visit, and the barrier will be checked against the same requirements it was consented under.

Things that pass on day one can fail three years later without anything being built: a hedge has grown into a foothold, the gate's self-closer has weakened, a new heat pump has gone in beside the fence, the kids' trampoline has moved. It is worth walking the fence line yourself once a year and looking at it the way an inspector would.

Common reasons a barrier fails

• A gate that no longer closes and latches from every position, particularly from just ajar.
• Objects placed within 1200 mm of the outside of the fence that give a foothold.
• Planting that has grown tall and rigid enough to climb.
• Gaps that have opened up under a fence on a section that has settled or eroded.
• A gate latch mounted low enough to reach through or over.

Getting it right the first time

Fencing is part of every pool we install, not something we hand off and hope about. We design the barrier line with the pool, build it to the consented detail, and have it inspected as part of the job. That means the day you get your code compliance certificate, the fence is genuinely compliant rather than technically signed off.

If you have a question about fencing, ask us. We have the technical support to answer it, or to go and find the answer.

The rules exist because young children drown quickly and silently in domestic pools. Everything above is a legal requirement, but the reason to meet it properly is not the inspection.