Most people assume an inflatable or portable pool is exempt because it’s temporary. It usually isn’t. The trigger is water depth, not pool permanence. Any pool that can hold more than 300 mm of water falls under the Building Regulations 2018 (Vic) and AS 1926.1, which means registration with council and a compliant barrier certified by a Form 23. Most products marketed as “inflatable” or “portable” clear that depth the moment you finish filling them.
The 300 mm Rule
The threshold is 300 mm. You measure it from the lowest point of the pool floor up to the lowest point at which water can be held, and 300 mm is barely ankle-deep on an adult. Here is how the common products stack up:
- Lay-Z-Spa-style inflatable spas: 600–700 mm filled, so well over.
- Bestway and Intex inflatable family pools: 750–1000 mm.
- Steel-frame pools with a vinyl liner (Bestway, Intex): anywhere from 800 mm to 1300 mm.
- Hot-tub-style inflatable spas: 600–650 mm.
- Inflatable child paddling pools are the exception: usually 200–250 mm, which sits under the line, so no Form 23.
The small clamshell paddling pool is fine. Nearly everything else a family wheels home from Bunnings or Kmart for summer is not.
The “More Than 7 Days” Practice
Some Victorian councils apply a soft seven-consecutive-day approach to portable pools: set it up for less than a week, drain it and store it, and the council often won’t pursue registration or a Form 23. Read that carefully, because it is an informal council practice, not a written exemption anywhere in the Building Regulations 2018. It also varies. Greater Geelong, Wyndham and Moorabool each handle a temporary pool their own way, so confirm with yours before you lean on it.
If your portable pool stays up past seven consecutive days, treat it as registrable. Some councils enforce actively, others move only on a complaint. The legal obligation and the liability are yours either way, not the council’s.
Your Options for a Portable Pool
Keep the water under 300 mm
If the pool is for very young children and you never fill it past 200 mm, no compliance requirement applies. What the pool is rated to hold doesn’t matter; only the water actually sitting in it counts. For a shallow toddler pool this is the genuinely simple path, and the one I point most young families toward.
Set up for less than seven days at a time
Fill it, use it, then drain, dry and store inside the week. Run that cycle as often as you like. Between uses the pool is effectively not resident at the property, so the seven-day clock keeps resetting. It suits the occasional summer pool that doesn’t live in the backyard all season.
Treat it as a permanent pool
If the pool holds water over 300 mm and stays up longer than seven days, the obligations are the same as a permanent pool:
- Register it with your council on the Pool and Spa Register.
- Surround it with a compliant barrier. A portable pool going up today is assessed against the current AS 1926.1-2012. The barrier must stand at least 1200 mm high, measured from the finished ground on the outside. Adjacent vertical rails can sit no more than 100 mm apart. The gate must be self-closing and self-latching and swing away from the pool. And a 900 mm non-climbable zone is swept from the top of the barrier on the outside (non-pool) face. Have it supplied and installed by a licensed fencing contractor and verified at inspection. An improvised barrier is the fastest way to a Form 24.
- Book a Form 23 inspection to certify the barrier.
For how the non-climbable zone works — the most commonly failed item — see our guide to the non-climbable zone in Victoria.
The maths is usually where owners stall. Full compliance on a pool meant to last one summer runs to the $250 inspection plus roughly $1,500–$3,000 for a compliant barrier installed, which often costs more than the pool did. Owners in that spot tend to go one of two ways: commit to a permanent pool with permanent fencing, or drop back to the short-set-up cycle under the seven-day practice.
Where Portable Pools Trip Owners Up
Sitting at full depth all summer with no barrier
This is the one we field most often. The pool goes up in December, gets two or three months of use, then comes down after Easter. No complaint, no council visit. But the property is non-compliant every single day that pool sits full and unfenced, and if a child gets in, the liability is the homeowner’s, not the council’s.
An inflatable spa dropped inside an existing pool fence
Now you have a second body of water inside the barrier system. Whether that’s compliant comes down to the existing fence. If the permanent pool fence already encloses the spa, you’re generally fine. If the spa sits outside that line, it needs its own compliant barrier. When in doubt, ask us before you fill it rather than after.
Moving the pool around the yard
Compliance depends on what surrounds the pool where it actually stands: fences, retaining walls, garden beds, the pump and filter. Move the pool and you change all of that. A setup that passed against the back fence can fail once it’s out on the lawn near nothing. It’s why we assess the barrier where the pool actually sits.
Selling With a Portable Pool
Sell with the portable pool empty and properly stored away and the property has no “pool” for Section 32 purposes, because there’s no body of water. Two things still matter: note the pool equipment in the Section 32, and make sure the pool is genuinely packed away rather than drained and left sitting in the yard. Our guide to selling a house with a pool in Victoria covers the vendor statement timing.
If the portable pool is set up and registered at the time of sale, treat it like any other pool sale — a current Form 23 is required.
Insurance and Liability
Home insurance generally expects any pool on the property, portable included, to comply with the regulations in force. A child-injury claim involving a non-compliant portable pool can be declined. Weigh that against the cost of getting it right, $250 for the Form 23 plus the barrier work, and the sums aren’t close.
If your portable pool is a larger hard-sided above-ground unit rather than a soft inflatable, the barrier rules sit closer to a permanent above-ground pool — see above-ground pool safety in Victoria.
FAQ
Does my inflatable pool really need a Form 23?
If it holds water more than 300 mm deep and stays set up for more than about seven days, yes — in Victoria it needs to be registered with council and surrounded by a compliant barrier certified by a Form 23. The depth is measured by the actual water level, not the pool’s maximum design depth.
What’s the 300 mm measured from?
From the lowest point of the pool floor to the lowest point at which water can be retained. Most paddling pools sit under 300 mm; most “family” inflatables, frame pools and inflatable spas sit well over it once filled.
Is the 7-day rule actually in the regulations?
No. It’s a council practice that varies between jurisdictions, not a written exemption in the Building Regulations 2018. If your pool stays up longer than seven consecutive days, the safest assumption is that it’s registrable, and the liability stays with you regardless of whether the council acts.
Can I just put up a temporary fence myself?
The barrier has to meet AS 1926.1 and then be certified at a Form 23 inspection, so it’s not a DIY job — have it supplied and installed by a licensed fencing contractor and verified by your inspector. If the cost outweighs a single summer’s use, the short-set-up cycle under the seven-day practice is usually the more sensible route.
Portable / inflatable pool Form 23 — $250 all-inclusive
VBA-registered. Across Greater Geelong, Bellarine, Moorabool and Wyndham. Same-day Form 23 where the barrier is compliant, free re-inspection if remediation is needed.
Call 0402 860 499 or book online.