Two dwellings on one block
Cashflow comes first. The tax position is the safety net, not the strategy.
Whether a dual-occupancy new build is right depends on you: your borrowing position, your goals, your timeframe, and your appetite for the build itself. Nobody can answer that before they’ve looked at your numbers, which is why the numbers come first here. For some investors it’s the sharpest tool available. For others it isn’t, and I’ll say so.
Built to pay its own way.
Cashflow is control. An asset that covers its own repayments is one you hold on your terms, without being forced to sell into a soft market because the sums stopped working. A dual occupancy is structurally suited to that: two income streams from a single land parcel, so the clears what one dwelling on the same land rarely can, and a vacancy on one side never leaves you carrying the whole cost. I model that yield conservatively, on rents the market will bear rather than the inflated figure on a builder’s brochure. None of that depends on a tax outcome or a story. Two rents on one block is the asset doing the work, and it lands in your account whether the market is loud or quiet.
Growth pays you eventually. Cashflow decides whether you are still holding the asset when it does. Two rents from one block mean a vacancy never takes the income to zero.
New stock reinforces it. Near-nil maintenance in the early years keeps your outgoings low when the loan is heaviest, and two brand-new dwellings carry more depreciation than a second-hand home can claim: real, non-cash support in the years an investment is tightest. Depreciation is also the most oversold number in property, so I present it at its true size: my own schedule is published, showing what it paid, how it fades, and the bill at sale.
And cashflow sets the pace of a portfolio. The real ceiling on a growing portfolio isn’t your deposit, it’s serviceability: what a lender will let you carry. An asset that covers its own repayments barely touches your borrowing power, where a cash-hungry one eats into it. So the sooner a property pays its own way, the sooner you qualify for the next. That is how one purchase becomes the engine for the next, rather than the end of the road.
What only new stock gives you.
Statutory builder warranty, and current energy and safety standards tenants will pay for. Two brand-new dwellings also carry more depreciation than a second-hand home can claim, including the plant-and-equipment deductions established property lost under the 2017 rules. And you choose the location, the layout and the build quality, rather than inheriting someone else’s compromises. What that depreciation is worth to your cashflow sits in the cashflow tab, alongside my own published schedule.
The part almost no one explains.
Markets deliver credit squeezes, rate shocks and downturns, and they will again. When rates jump and a property temporarily runs at a loss, how that loss is taxed is everything. From 1 July 2027, under the reforms enacted in June 2026, an investor who buys an established property after 7:30pm on 12 May 2026 can no longer offset that loss against their wage income. It’s quarantined until they have other property income or a capital gain to set it against. A qualifying new build is treated differently, with a choice of CGT method at sale.
How the rules apply to your own position, on your income and your holdings, is a question for your accountant, confirmed in writing before anything is relied on, not one I can settle here. What I do is make sure it is asked before you commit, not after. The deduction never turns a bad deal into a good one, but in a hard year it cushions a blow the established-property investor takes with nothing underneath them.
When I’ll tell you it’s not the move.
None of this makes a new build right for everyone. The premium you pay to build has to be earned back by the numbers in that specific location, and in thin markets it doesn’t always stack up. There’s construction risk, holding cost while you build, and streets where too many two-dwelling builds already compete for the same tenant and the same buyer. My job is to run all of it, financial and practical, against your position, and to be the one who says “not this one” when it doesn’t fit.
Why the market is moving here, and why that cuts both ways.
For property bought after 12 May 2026, the tax benefit of is confined from July 2027 to new builds. The law was written deliberately to push investor demand towards this category, which is exactly why the buying discipline matters more here, not less. The risks worth watching are specific: developer premiums, thin land content, oversupplied estates, tax-first thinking. So every deal I model has the tax benefit stripped out first, to prove the asset stands on its own: real land content, oversupply screened, rents at what the market will bear. If your numbers say an established purchase serves you better, I’ll say so.
Current law as enacted, shared as general information, not tax advice (current at September 2026). Your accountant confirms how it applies to your position.