New-home budgets need room beyond the contract price

For a new home, off-the-plan purchase or house-and-land package, the contract price may not be all the cash required before settlement. Variations, site costs, buying costs and a lender valuation below the total project cost can each increase the buyer's contribution.

The Reserve Bank of Australia reported that new-dwelling construction prices rose 1.8% in the June quarter 2026 and 5.3% over the year. This is an aggregate market observation, not a forecast that an individual contract will rise by the same amount.

Separate fixed costs from costs that can still move

Included contract work — identify the plans, specifications, site allowances and finishes already included in the signed price.

Variations and site costs — confirm who can approve a change, how it is priced and when payment is due.

Valuation shortfall — a lender may assess the property or completed project below the total amount being paid, leaving the buyer to fund the difference.

Illustrative example: the gap can reach $35,000

If approved variations and extra site work add $20,000, and the lender valuation is $15,000 below the total project cost, the buyer may need another $35,000 in cash. Stamp duty, legal fees, finance costs and other buying expenses may still sit outside this example.

Four checks before committing

Read the inclusions — do not rely only on the words fixed price; check the schedules, allowances and exclusions.

Understand approval steps — keep written records of every variation and its effect on price and timing.

Confirm the valuation basis — ask how the lender treats land, construction stages, variations and the completed value.

Keep cash after the deposit — preserve a buffer for settlement, holding costs and approved changes instead of using every available dollar upfront.

Bottom line

A contract price is a starting figure for the finance plan, not always the final cash requirement. Have the contract reviewed by an appropriate legal professional and confirm the lending and valuation treatment before committing.

Sources

Reserve Bank of Australia — Economic Conditions, August 2026 Statement on Monetary Policy

Australian Bureau of Statistics — Building Approvals, Australia

Moneysmart — Buying a house

General information only. This is not financial advice. Loan options and eligibility depend on your personal income, liabilities, assets and lender assessment criteria.