Yes, boundary fences can form part of a pool barrier, and they are one of the most common sources of inspection failures, because half of the fence's compliance lives on your neighbour's side.
Where a boundary fence acts as part of the barrier, the standards typically require it to be taller than a regular internal pool fence, generally 1.8 metres measured from inside the pool area, with a non-climbable zone on the inside face, often achieved with a 900mm non-climbable strip at the top of the fence's inside face.
Here is the uncomfortable part: things on the neighbour's side can compromise your barrier. Structures, retaining walls and ground levels next door change the effective height and climbability of the shared fence. You cannot control your neighbour's yard, but your pool's compliance can still depend on it, which is why inspectors assess boundary fences carefully and why early conversations with neighbours beat disputes at settlement time.
Boundary fences are shared assets under fencing law, but barrier compliance is your obligation as the pool owner. If the shared fence needs work to make your pool compliant, the cost conversation with your neighbour is governed by your state's dividing fences rules, worth knowing before you commit to replacement quotes.
Boundary fence compliance involves measurements on both faces and judgement about what standard applies to your pool's age. That is inspector work. A pool fence inspection tells you exactly where the shared fence stands and the minimum compliant fix, before you spend money on the wrong one.
Ready when you are
Fixed price confirmed before we book, inspection completed on site, and your certificate lodged for you.