Congratulations — you’ve done it. The keys are in your hand, the paint smell is still fresh, and you’re standing in a brand new home that’s entirely yours. It’s a massive deal, and you’ve earned every bit of that excitement. But somewhere in all that excitement, something important may have slipped through the cracks. A BASIX rainwater tank. Something that’s not on the builder’s highlight reel of stone benchtops and floating floors, but that could save you thousands of dollars and a serious headache down the track.
We’re talking about your water storage setup — or more specifically, the fact that in many new builds across Queensland and New South Wales, you’re either required to have a rainwater tank, or you’re missing a golden opportunity by not having one.
Let’s fix that right now.
What Your Builder Was Focused On (And What They Weren’t)
Your builder did a lot of things right. They navigated council approvals, managed subcontractors, hit (most of) their deadlines, and delivered you a brand new home. But builders are focused on the structure — the build itself. Once practical completion is signed off, they’re on to the next job. Water management? Tank installation? That’s often treated as an afterthought, something to tick off rather than something to genuinely think through. And if you’re in NSW, that tick-box has a name: BASIX.
BASIX in NSW: What New Homeowners Need to Know
If your new home is in New South Wales, your builder almost certainly had to meet BASIX rainwater tank requirements — the Building Sustainability Index, which sets minimum standards for water and energy efficiency in new residential builds. Under BASIX, most new homes are required to include a rainwater tank plumbed into the house — typically connected to toilets, laundry cold water, or outdoor use. The size and connection requirements vary depending on your location and the nature of the build, but the intent is clear: NSW wants new homes to use less mains water.
Here’s the part that surprises a lot of new homeowners: just because your home passed BASIX at approval stage doesn’t necessarily mean your tank setup has been optimised for actual, practical use. A lot of BASIX-compliant installs are done to minimum spec. The tank is there, it’s connected, the box is ticked — but whether it’s the right size for your household’s needs, positioned well, or set up to genuinely reduce your water bills? That’s another question entirely.
If you’re not sure what’s been installed at your property or whether it meets your actual needs, it’s worth finding out sooner rather than later.
Queensland: Council Requirements Are Getting Stricter
Queensland has its own set of requirements, and they vary considerably by council area. In some parts of South East Queensland — particularly around Brisbane, the Gold Coast, Sunshine Coast, and Ipswich — rainwater tank requirements are baked into development approvals for new homes. In other areas, tanks are strongly encouraged through rebates even if not strictly mandated.
What hasn’t changed is the logic behind it all: Queensland gets variable rainfall, faces periodic water restrictions, and is home to a fast-growing population that’s putting real pressure on water infrastructure. A properly set-up rainwater tank isn’t just a compliance measure — it’s genuinely useful.
Whether you’re in Brisbane’s outer suburbs, the Sunshine Coast hinterland, or a new estate near Toowoomba, having the right tank properly connected to your home is one of the smartest things you can do in those first few months of ownership.
“But Don’t I Already Have a Tank?”
Maybe! Some builders do include a tank as part of the standard build — but as we touched on above, minimum compliance and optimal setup are very different things. Here are a few questions worth asking:
What size is it?
A common BASIX-compliant tank might be 2,000–3,000 litres. For a family of four that’s also watering a garden and doing regular laundry, that can run low quickly. Stepping up to a 5,000 litre or 10,000 litre tank makes a meaningful difference to how long your stored water actually lasts between rain events.
What is it connected to?
A tank that’s only connected to your garden tap is missing most of its potential. Plumbed into toilets and laundry as well? Now you’re talking real savings — toilets account for around 15–20% of indoor household water use.
Where is it positioned?
Placement matters — both for practical access and for maximising catchment from your roof area.
What condition is it in?
Even a new tank on a new build can have debris from the construction phase sitting in it. Worth checking.
The Opportunity Most New Homeowners Miss
Here’s the honest truth: moving into a new home is the perfect time to get your water storage right. You’ve got a blank slate. The landscaping is probably still being established. You know what your roof catchment looks like. You haven’t built your life around a setup that would be awkward to change.
A lot of the people who call The Water Tank Factory aren’t new homeowners — they’re people who’ve been in their homes for five or ten years and are finally dealing with an inadequate setup they should have sorted out in year one. Don’t be that person.
Getting set up properly now means:
- Lower water bills from day one, especially if you’re plumbed into toilets and laundry
- A buffer against water restrictions — particularly relevant in SEQ and regional NSW
- Tick that BASIX or council requirement with a setup that actually works, not just one that passes inspection
- Protection against the kind of sky-high water usage that comes with establishing a new garden
Choosing the Right Tank for a New Build
This is where it gets practical. The Water Tank Factory has been manufacturing poly water tanks since 1984 and has helped hundreds of thousands of Australian households get their water storage right. Here’s a quick guide for new homeowners:
Round tanks are the most popular option for a reason — they offer the best value per litre, come in a huge range of sizes from 360L right up to 34,000L, and are structurally tough. If you’ve got the space, a round tank is usually the right call. The 5,000L and 10,000L round tanks are perennial bestsellers for suburban homes.
Slimline tanks are designed for tighter spaces — down the side of a house, along a fence line, or in spots where a round tank just won’t fit. Don’t let a narrow yard stop you from having decent storage capacity.
Underground tanks are worth serious consideration for new builds, particularly where you want to maximise your usable yard space. Lattice™ Tank technology means these can handle surface loads, and because they’re completely out of sight, they don’t affect your landscaping plans at all.
Underdeck tanks are ideal for homes with raised decks or alfresco areas — they sit underneath and make use of space that would otherwise be completely wasted.
All poly tanks from The Water Tank Factory are made from heavy-duty virgin-grade polyethylene with heavier wall construction than standard industry specs, UV-stabilised for Australian conditions, and come with a 10+10-year warranty. They’re available in over 20 colours, so you can match your home’s exterior without ending up with an eyesore in the backyard.
A Quick Word on BASIX Rebates
Before you write off a tank upgrade as “a cost,” check what rebates are available in your area. State and local government rebate schemes for BASIX rainwater tanks have been around for years and the eligibility criteria have been updated going into 2026. Depending on your state and council area, you may be able to claim back a meaningful portion of the purchase price.
The Water Tank Factory has a rebates guide on the website that walks through what’s available state by state — well worth a look before you make any decisions.
New Home, Smart Start
You’ve worked hard to get into your home. The last thing you want is to look back in five years and wish you’d sorted your water setup properly from the beginning — especially as water costs continue to climb and restrictions become more frequent across parts of Australia.
The good news is it’s easy to get this right. The Water Tank Factory manufactures and delivers tanks factory-direct across Queensland, New South Wales, and beyond — with a committed delivery date when you order, so you can plan your installation without the guesswork.
Head to watertankfactory.com.au to browse the full range, use the water catchment calculator to work out the right size for your roof area, and find out about rebates in your area. If you’d rather talk it through, give the team a call on 1300 826 532 — they’ve been doing this since 1984 and genuinely know their stuff.
Welcome to your new home. Now let’s get your water sorted.