Two homes on one block is a common Sydney strategy, and a commonly underestimated piece of finance.
A duplex, or dual occupancy, is two homes on one block. It is funded with a construction loan valued on the finished pair, not the block you start with. Approvals, a fixed-price contract and a plan for the end debt come before the first drawdown.
The lender pays the builder in stages, and its assessment depends on whether you keep both, sell one, or live in one and rent the other.
Part of the investment property loans guide.
From a real Links file: a first home bought with a secondary dwelling planned, with the purchase and the later build assessed separately.
Yours could be the next one.
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On end value. The lender takes the plans and the fixed-price build contract, forms a view of what the completed dwellings are worth, and sizes the facility against that rather than against the land.
Funds release in stages as construction progresses, with interest accruing only on what has been drawn. Your existing equity in the block frequently means little additional cash deposit is required, which is one of the genuine attractions.
Three places. Zoning and approval, which is council territory and must be settled before finance is arranged. Whether the dwellings are on separate titles at completion or remain on one, which affects both the valuation and what you can sell.
And contingency, because variations and site costs on a two-dwelling build accumulate faster than on a single house. All three are manageable; none is optional. What the NSW planning changes now allow on R2 blocks is covered in the NSW low and mid-rise housing policy.
A duplex works when the completed end value comfortably exceeds land plus build plus contingency plus holding costs, with a margin. It does not work because the block is big enough. The construction guide covers the funding mechanics.
Build costs and end values both move, so the feasibility is run on current builder quotes and realistic valuations rather than on what a neighbour achieved three years ago. A dual key home, two dwellings on one title, is financed differently; see dual key property loans.
Four things, in the order a lender looks at them.
Often little cash if you already own the land: existing equity usually covers much of it, because the lender assesses against the completed end value rather than the current block.
Where you are buying the land as well, expect a larger contribution than on an ordinary purchase. The precise figure depends on the end valuation and your servicing.
Not necessarily to build, but it matters greatly for what you can do afterwards. Subdividing into separate titles is what allows you to sell one independently, and the process runs alongside the build with its own timeline and costs. Deciding early is far simpler than retrofitting the intention later.
At many lenders, yes, where the dwelling is complete and the rental income is evidenced or assessed by the valuer. It is discounted for vacancy and costs like any rental income, and the discount rate varies.
It generally helps the position considerably where you are keeping both. For a single secondary dwelling rather than a second full home, granny flat finance covers the NSW rules and the funding options.
It depends on the scale and your intention. Two dwellings that you keep or partly keep is usually assessed as residential construction.
Building to sell both can tip into development lending at some lenders, with different terms and a different lender list. Stating the intention at the outset avoids a difficult conversation later.
Variations come from your contingency, which is why it belongs inside the approved facility rather than in a savings account you hope not to touch. Applying for additional funds mid-build is possible but assessed hard and slowly, and it arrives at the worst possible moment.
Charles can run the finance feasibility before you commit to plans, including what each exit does to the structure.
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General information only, not credit or financial advice. Professional lending policies, eligible occupations and loan-to-value thresholds vary by lender and change over time. Eligibility is confirmed against current lender policy in an assessment; nothing on this page is a promise that any lender will approve any application.
