Building Costs Are Up, Now So Is Your Rate: What First Home Buyers Need to Know
Borrow less than the bank offers you, as building costs in Melbourne keep climbing, and the RBA lifted the cash rate to 4.60% on 29 September, so every extra dollar of build price now costs more each month. Most buyers chase the rate headline and overlook their loan size, yet a smaller loan protects you whatever the RBA decides next. Victoria’s stamp duty exemption and the $10,000 First Home Owner Grant can soften the blow, but only if you plan around them. This guide shows what the squeeze costs and how to use those incentives before you commit.
The Double Squeeze Facing First Home Owners
Most buyers blame interest rates alone, and they’ve got it backwards. Builders’ prices set the size of your loan, and the cash rate sets what that loan costs you. You absorb both hits at once, so treat them as one problem and budget for both together.
The data backs that up. Nationally, house construction costs rose 2% in the June quarter of 2026 and now sit 51% above pre-pandemic levels, according to the National Housing Supply and Affordability Council. A 2% rise sounds small until you stack it on top of 51%, which is why last year’s quote deserves a second look.
What a 4.60% Cash Rate Does to Your Repayments
The RBA lifted the cash rate by 25 basis points to 4.60% on 29 September. That’s its fourth rise of 2026 and 100 basis points since the start of the year, per Commonwealth Bank’s decision summary. The Board also left the door open to further increases, so plan for that outcome, not for hope.
Lenders also test your loan at a buffer above the actual rate. So your borrowing power shrinks even when your income stays put. Ask for a fresh pre-approval before you sign anything, because an approval from six months ago no longer reflects today’s reality.
Want your own numbers? Book a free property analysis with us and find out what you can borrow safely, and which Victorian incentives you qualify for, before you sign anything.
The Monthly Cost of a Build Blowout
These figures assume a 6.5% rate over 30 years, principal and interest, so treat them as a guide.
- An extra $50,000 on your build adds roughly $316 a month.
- A 0.25-point rate rise on a $600,000 loan adds roughly $98 a month.
- Every month of delay keeps your rent running while interest accrues on drawn funds.
- Together, those hits can swallow the buffer you planned for bills and savings.
Which Victorian Incentives Can First-Timers Still Claim?
Victoria still gives you a real edge. The State Revenue Office exempts eligible first-home buyers from stamp duty on homes up to $600,000, reduces duty on homes up to $750,000, and covers vacant land you buy to build your first home.
The $10,000 First Home Owner Grant can sit on top of that saving when you buy or build a new home, provided your contract price stays at $750,000 or less. That cap shapes your design decisions as much as your budget, so confirm it before you pick a floor plan or a design upgrade.
Structure matters, because in many land-and-build deals you pay duty on the land value rather than the finished house, so the savings can run bigger than you’d expect. Confirm both concessions and your contract structure with the State Revenue Office before you sign.
Your Pre-Contract Checklist
Run this checklist before you commit a cent.
- Stress-test your repayments at a rate one percentage point above today’s.
- Ask for a fixed-price contract and a clear list of inclusions.
- Query every provisional sum, because those figures move first.
- Hold a contingency outside your deposit for site costs and variations.
- Confirm your lender’s valuation supports the contract price.
- Confirm your contract price sits under the $750,000 cap for the First Home Owner Grant.
Why the Cheapest Quote Rarely Stays the Cheapest
A low headline price looks attractive when you compare builders side by side, but it often hides allowances that the final contract quietly shifts back onto you. Builders can keep a quote sharp by listing generous provisional sums, basic inclusions and optimistic site assumptions, then adjust the figures once work begins and you have already committed your deposit.
You protect yourself by comparing contracts line by line rather than total by total, which means asking each builder to confirm what the price includes, what it excludes and which items remain estimates. A slightly higher fixed price with clear inclusions usually costs you less in the end than a cheaper offer that grows with every variation.
Build Your First Home Around the Next Decade
Most buyers treat their first home as a single purchase, yet it works better as the first move in a longer roadmap that shapes how much you can borrow, save and invest over the following decade. When you size your loan with that horizon in mind, you leave room to build equity steadily instead of stretching to the limit on day one.
A disciplined plan also gives you a clear reason to say no when a design upgrade, a larger floor plan, or a rushed deadline pushes the budget past what you can comfortably carry. Buyers who hold that line tend to keep their finances flexible, which matters when rates, wages and construction prices move in directions nobody can predict.
Discipline Beats Hype When Rates and Build Prices Rise
Here’s the principle: claim every Victorian incentive you qualify for, then set your budget by what you can carry at 4.60% and above, not by what a lender approves. Walk away from any deal that only works if rates fall. Forecasters disagree on when cuts arrive, and build prices won’t wait for them.
Simply Wealth Group backs everyday Australians with property strategy, mortgage solutions and education built around a long-term plan. Our team are full-time property investors who give you more than numbers. Talk to property investment advisors who invest themselves, and start with a free property analysis.
Ready to run your numbers? Book your free property analysis at Simply Wealth Group or call us.
FAQs:
How do construction loan progress payments work?
Lenders release your loan in stages as the build progresses, so you pay interest only on the amount drawn. Early repayments stay lower, then climb as each stage completes. Ask your broker to model your final repayment at today’s rate, plus a margin.
What should I watch after the September rate rise?
The RBA meets again on 2–3 November, and the quarterly inflation figures land before then. Those two events shape whether lenders hold or lift their rates. Refresh your pre-approval and stress-test your budget before that date.
What if I wait for rate cuts before building?
Forecasters disagree on when cuts arrive, and construction costs keep rising while you wait. Run both scenarios: build now with a buffer, or save longer against higher prices. Choose the path your budget survives at today’s rate.
How does Simply Wealth Group support a first purchase?
Our team are full-time property investors, so we plan your purchase around long-term growth, not hype. We cover mortgage solutions, property strategy, education and project management. You can start with a free property analysis.
How do the grant and stamp duty relief work together?
The $10,000 First Home Owner Grant can sit on top of the duty exemption or concession when you buy or build new. It applies only to new homes with a contract price up to $750,000, so established homes miss out. Check your eligibility with the State Revenue Office before you sign.
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