Clients ask this question constantly: why buy a new build over an existing house? It is a fair question, and the honest answer is that both options have a real case. Here is what actually separates them, without the sales pitch.
What You Get With a New Build
A new build is exactly that: new. You are the first owner, which means no one has lived in it, worn it down, or patched it up before you. That comes with a builder’s warranty, so if something goes wrong structurally in the early years, you are covered in a way an established home simply cannot offer.
You also get to design accordingly. Because the property has not been built yet, or has only just been completed, you can shape the layout, finishes and inclusions around what actually works, rather than adapting your life to someone else’s decisions from twenty or thirty years ago. Everything in the property is new: new appliances, new fixtures, new systems. And if you want to customise the build to suit your goals, whether that is a specific floorplan or a particular finish, that option is on the table in a way it never is with an existing dwelling.
What You Cannot See In An Established Home
The core issue with an established home is simple: you do not know what you are buying. You are looking at the finished product, not the process, and a lot of what matters is hidden behind the walls.
Take a weatherboard house as an example. You cannot see the plumbing, and you cannot see what could potentially go wrong with it until it already has. The home is older, so there is no warranty covering you if something fails. The roof is another unknown. Whether it is terracotta, clay or colorbond, older roofing material starts to deteriorate over time, and that deterioration often means repair work you did not budget for, discovered only after settlement.
None of this means an established home is a bad buy. It means the risk sits in a different place: instead of paying for certainty upfront, you are taking on the unknown condition of a property that someone else lived in first.
The Honest Case For Buying Established
To be fair to established property, it is not a straightforward loss on every measure. Yes, an existing house can sometimes be cheaper than a new build. That is a real advantage, and it is worth acknowledging plainly rather than glossing over.
What that lower price actually costs you is effort. Buying established really just depends on how much effort you are willing and able to put in to deal with the existing dwelling: understanding its condition, budgeting for repairs as they surface, and accepting that some of what you find will not be visible until you are already the owner. For a buyer with the time, trades contacts and risk appetite to manage that, established property can make sense. For a buyer who wants predictability, it is a harder path.
The Tax Difference After The 2026 Law Change
Tax treatment used to be a similar conversation regardless of whether a property was new or established. That has now changed, and the change is significant enough that it belongs in this comparison.
Negative gearing and depreciation have always worked differently for new versus existing stock. On the depreciation side, a new build gives you a longer term of depreciation to claim against the property, which can help you offset your income over a longer period than an established home typically allows.
What changed in 2026 goes further than that. Under the Treasury Laws Amendment (Tax Reform No. 1) Act 2026, which received Royal Assent on 26 June 2026, negative gearing on residential property is being limited to new builds and to government housing priorities such as build to rent and social or affordable housing.
For an established residential investment property purchased after 7:30pm AEST on 12 May 2026, losses can only be deducted against other residential property income, and that restriction applies from the 2027 to 2028 income year. Properties already held at the time of the announcement can continue to be negatively geared until they are sold.
Capital gains tax is changing separately and across the board. From 1 July 2027, the 50% CGT discount for individuals, trusts and partnerships is replaced with cost base indexation and a minimum 30% tax rate on gains accruing after that date. The 50% discount still applies to gains accruing up to that point. That change is not limited to established property, so it is not a point of difference between new and established stock.
In practical terms, this is a genuine structural advantage for new build property that did not exist in the same form before this law passed. It is a material factor in the new build versus established decision, not a marketing angle. It also touches your specific tax position, which is exactly the kind of detail worth confirming with your own accountant or tax adviser before you act on it.
How This Applies To Purpose Built NDIS, Co-Living and Triple Living Stock
Everything above matters most when you are looking at purpose built property, including NDIS, Specialist Disability Accommodation (SDA), co-living and triple living developments, because these are typically delivered as new builds from the ground up.
That means you are getting the same fundamentals as any new build buyer: a warranty, no prior occupancy to inherit issues from, new appliances and systems throughout, and the ability to design or customise the property with its specific purpose in mind, whether that is accessibility features for SDA compliance or the layout needed for a co-living or triple living configuration. On the tax side, because this stock is new build, it keeps negative gearing under the current law, rather than facing the restriction that now applies to established property purchased after 7:30pm AEST on 12 May 2026.
None of this guarantees an outcome, and it does not mean an established home is the wrong choice for every buyer. What it means is that the case for a new build purpose built property is stronger today than it was before this law change, and it is worth weighing that alongside the design, warranty and condition factors that have always mattered.
This is general information only and not financial, tax or legal advice. Speak to a licensed adviser about your circumstances.
Talk to ACIGP about whether a new build or an established property fits your goals, and how the new tax rules apply to the specific asset you are considering.
Sources: Treasury Laws Amendment (Tax Reform No. 1) Act 2026 (Act No. 49 of 2026, Royal Assent 26 June 2026), Federal Register of Legislation; and Australian Taxation Office, “Tax reform: Boosting home ownership: Reforming negative gearing and capital gains tax”.