Construction loan applications involve more moving parts than a standard home loan.
Lenders need to see detailed plans, builder contracts, council approvals, and a clear funding schedule before they'll commit. Missing any of these pieces can delay settlement by weeks or months, which pushes back your building start date and can trigger penalty clauses in your building contract.
The preparation work happens before you lodge the application. Once you understand what lenders are looking for and how they assess construction funding, you can gather everything upfront and avoid the back-and-forth that slows most applications down.
What Lenders Need to See Before They Approve Construction Finance
Lenders assess construction loans differently to standard home loans because the security doesn't exist yet. They want proof that the project is viable, that the builder is credible, and that the funds will cover all stages of the build.
You'll need a fixed price building contract with a registered builder, council-approved plans, and a progress payment schedule that breaks the build into clear stages. Most lenders also require a valuation that confirms the finished property will be worth more than the total loan amount. If you're building on land you already own, they'll also assess the current land value as part of the security.
Consider a couple planning to build in Wheelers Hill. They owned the land outright and had preliminary plans from a draftsperson, but their builder hadn't finalised the contract and council approval was still pending. The lender couldn't proceed without a signed fixed price contract and stamped plans. By the time those documents were ready, interest rates had moved, and the couple had to reapply under different lending criteria. The delay added three months to their timeline and increased their borrowing costs.
How Progress Payment Schedules Affect Your Cash Flow
Construction loans release funds in stages as the build progresses. Lenders only charge interest on the amount drawn down, which means your repayments start low and increase as more funds are released.
A typical progress payment schedule includes five or six stages covering base stage, frame stage, lock-up, fixing, and completion. Your builder submits a claim at each stage, the lender arranges a progress inspection, and once approved, the funds are released directly to the builder. You'll pay a progressive drawing fee for each inspection, usually between $250 and $400 per drawdown.
During construction, most borrowers make interest-only repayments on the drawn amount. If $150,000 has been released for the base and frame stages, you're only paying interest on that portion, not the full loan amount. Once the build is complete and you move in, the loan converts to a standard principal and interest home loan.
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Fixed Price Contracts vs Cost Plus Contracts
Most lenders prefer fixed price building contracts because they limit the risk of cost blowouts. A fixed price contract locks in the total building cost upfront, which gives the lender certainty that the loan amount will cover the build.
A cost plus contract, where you pay the builder's costs plus a margin, introduces uncertainty. If materials cost more than expected or the build takes longer, the final cost can exceed the approved loan amount. Some lenders won't accept cost plus contracts at all, and those that do often require a larger buffer between the loan amount and the expected property value.
If you're considering a cost plus arrangement because it offers more flexibility on design changes, factor in the financing limitations. You may need a bigger deposit or a higher valuation to satisfy the lender's risk appetite.
Council Approval and Development Application Timing
You can't settle a construction loan until council approval is in place. Some lenders will issue conditional approval while your development application is being assessed, but they won't release any funds until the plans are stamped and all conditions are met.
Council approval timelines vary depending on the complexity of the build and the local council's workload. A straightforward single dwelling on suitable land in an established area might take six to eight weeks. A custom design in an area with heritage overlays or vegetation protections can take several months.
If you're working with a project home builder on a house and land package, the builder often manages the council approval process as part of the contract. If you're doing a custom build, you'll need to coordinate between your architect, builder, and the council directly. Delays at this stage push back your entire construction timeline, so submit early and follow up regularly.
Owner Builder Finance and Why It's Harder to Secure
If you're planning to act as an owner builder, expect the construction loan application to be more involved. Lenders see owner builders as higher risk because you're not a licensed professional, and the build is more likely to run over time or over budget.
Most lenders require owner builders to provide detailed quotes from subcontractors, proof of relevant experience, and a larger deposit. Some won't lend to owner builders at all. The loan amount is typically lower as a percentage of the property's end value, which means you'll need more cash upfront to cover the shortfall.
If you're considering owner building to save on builder margins, factor in the financing constraints before you commit. The deposit requirement alone can outweigh the savings, and the additional paperwork and risk may not suit a first home buyer timeline.
How Long You Have to Start Building After Approval
Most construction loans require you to commence building within a set period from the disclosure date, typically six to twelve months. If you don't start within that window, the loan offer expires and you'll need to reapply.
This matters if you're buying land and building in stages, or if there are delays with council approval or builder availability. Lenders include this clause because property values and interest rates can shift over time, and they need to reassess the risk if the build is delayed.
If you know your builder is booked out for several months, or if council approval is taking longer than expected, speak to your broker before you lodge the application. It may make sense to wait until the timeline is clearer rather than rushing into an approval that expires before you're ready to build.
What Happens If Your Build Goes Over Budget
If your construction costs exceed the approved loan amount, you'll need to cover the shortfall yourself. Lenders won't automatically increase the loan mid-build unless there's sufficient equity in the property to support the additional borrowing.
This is one reason why lenders require a detailed cost breakdown and a valuation before approval. They want to confirm that the loan amount, plus your deposit, covers the full cost of the land and build with a small buffer for contingencies.
If you're planning a custom design or including upgrades that aren't in the base contract, add those costs to your budget early. Underestimating the total cost is one of the most common reasons construction projects stall halfway through.
Structuring Your Loan for Flexibility After the Build
Once construction is complete, your loan converts from a construction facility to a standard home loan. At that point, you can choose whether to continue with interest-only repayments or switch to principal and interest.
Some borrowers prefer to keep the loan on interest-only terms for the first year or two after moving in, especially if there are additional costs like landscaping, driveways, or fencing that weren't included in the building contract. Others switch to principal and interest immediately to start reducing the loan balance.
You can also refinance to a different lender once the build is finished and the property has been revalued. If you've built in an area where values have increased, or if interest rates have dropped, refinancing might offer a lower rate or additional features that weren't available during construction.
Documentation Checklist You'll Need Before Lodging
Before you lodge a construction loan application, make sure you have a fixed price building contract, council-approved plans, a progress payment schedule, a soil test, and proof that your builder is licensed and insured. Lenders will also ask for standard home loan documents like payslips, tax returns, bank statements, and proof of deposit.
If you're using a guarantor to reduce your deposit, the guarantor will need to provide their own financial documents and attend a separate appointment with the lender or a solicitor. If you're accessing a government scheme like the Home Guarantee Scheme, make sure your property and builder meet the eligibility criteria before you apply.
Missing documents are the biggest cause of delays. Gather everything before you start the application, and keep digital copies in a folder so you can send them through quickly if the lender requests additional information.
Call one of our team or book an appointment at a time that works for you. We'll review your plans, check your documentation, and make sure your construction loan application is ready to go before you lodge.
Frequently Asked Questions
What documents do I need for a construction loan application?
You'll need a fixed price building contract with a registered builder, council-approved plans, a progress payment schedule, a soil test, and proof that your builder is licensed and insured. Lenders also require standard home loan documents like payslips, tax returns, and bank statements.
How do progress payments work during construction?
Construction loans release funds in stages as the build progresses, typically covering base, frame, lock-up, fixing, and completion stages. Lenders charge interest only on the amount drawn down, and a progress inspection is conducted before each payment is released to your builder.
Can I get a construction loan if I'm an owner builder?
Yes, but it's harder to secure and usually requires a larger deposit. Lenders see owner builders as higher risk, so you'll need detailed quotes from subcontractors, proof of experience, and a lower loan-to-value ratio than you would with a registered builder.
How long do I have to start building after loan approval?
Most construction loans require you to commence building within six to twelve months from the disclosure date. If you don't start within that window, the loan offer expires and you'll need to reapply under current lending criteria.
What happens if my construction costs exceed the approved loan amount?
You'll need to cover the shortfall yourself. Lenders won't automatically increase the loan mid-build unless there's enough equity in the property to support additional borrowing, which is why accurate cost estimates and a valuation are essential upfront.
