Everything You Need to Know About Construction Loans

Building a home involves more than choosing the right block and design.

The financing structure affects when you pay, how much you pay in interest, and whether your builder gets paid on time. Understanding how construction funding works before you sign a contract gives you control over timing, cashflow, and the relationship with your builder.

How Construction Loans Differ From Standard Home Loans

A construction loan only charges interest on the amount drawn down at each stage of the build. If your total build cost is $650,000 but only $150,000 has been released to your builder after slab and frame, you pay interest on $150,000, not the full amount. This structure keeps early interest costs lower than a standard loan where the full balance is advanced on settlement.

Progressiv drawdowns happen at agreed milestones, typically slab, frame, lock-up, fixing, and completion. Each release requires a progress inspection by the lender's valuer to confirm the work matches the stage claimed. Once the valuer signs off, the bank releases funds directly to the builder within a few business days. The builder invoices according to the progress payment schedule in your building contract, and the lender matches that schedule during assessment.

Fixed Price Contracts and How They Protect Your Loan Structure

Most lenders require a fixed price building contract before approving construction funding. The contract sets the total build cost, locks in the payment schedule, and names a registered builder. Lenders use this document to calculate your loan amount and confirm that progress payments align with construction stages.

Consider someone building a four-bedroom home in Buderim at the suburb's current median. They engage a registered builder under a fixed price contract with five scheduled draws. The lender assesses the contract, approves the total amount, and sets the drawdown schedule to match. When the frame is completed, the valuer inspects, the lender releases that portion, and the borrower's interest adjusts to reflect the new drawn balance. The fixed price structure means no surprise cost blowouts that would require additional funds or a loan variation midway through the build.

Cost-plus contracts, where the builder charges for materials and labour as the project progresses, are rarely accepted by mainstream lenders. The lack of a locked-in total makes it difficult for the bank to assess borrowing capacity or set a final loan amount. If you are working with an owner-builder arrangement or a cost-plus agreement, you will need a lender that offers owner builder finance or accepts non-standard contracts. These loans typically require larger deposits and come with higher interest rates to offset the lender's increased risk.

The Timeline From Application to First Drawdown

Construction loan applications take longer to assess than standard home loans because the lender reviews council plans, the building contract, and the builder's credentials in addition to your financial position. You will need council approval, a development application if required by your local authority, and evidence that your builder is licensed and insured. In Buderim and across the Sunshine Coast, council approval timelines vary depending on the complexity of the design and whether the land sits within an overlay or bushfire-prone area.

Once the loan is approved, most lenders require you to commence building within a set period from the disclosure date, typically six to twelve months. If the build has not started within that window, the loan offer may lapse and need reapproval at current rates. Some lenders allow extensions if delays are caused by weather, council, or supply chain issues, but this is not automatic.

The first drawdown covers the initial deposit to the builder, usually ten percent of the contract price. This happens after contracts are exchanged and before work begins. Subsequent draws occur as each stage is completed, inspected, and invoiced. The time between each drawdown depends on how quickly your builder progresses and how fast the lender's valuer can schedule the inspection.

Interest-Only Repayments During Construction

Most construction loans offer interest-only repayment options during the building phase. You pay interest each month on the amount drawn down so far, but no principal. This keeps monthly costs manageable while you are still paying rent or holding another property. Once the build is complete and the loan converts to a standard home loan, repayments switch to principal and interest unless you negotiate an extended interest-only period.

Consider a buyer building in Sippy Downs while renting nearby. During the first three months, only the deposit and slab stage have been funded. Their repayments cover interest on roughly thirty percent of the loan. As the frame and lock-up stages are completed over the following months, the drawn balance increases and so do the monthly repayments. By completion, they are paying interest on the full amount. The loan then converts, and they move to regular repayments that include principal.

Land and Construction Packages Versus Buying Land First

A land and construction package bundles the land purchase and build contract into a single transaction. The developer or builder arranges both components, and the finance is structured as one loan with two settlements: one when the land title is registered, and another when the build is complete. Some lenders treat this as two separate loans, one for the land and one for construction, while others assess it as a single facility with staged funding.

Buying land first and arranging the build separately gives you more control over the builder, design, and timing, but it requires two separate finance applications and two valuations. If you buy a block in Palmview or Baringa and wait twelve months before starting the build, you will need to reapply for construction funding based on your financial position at that time. If rates have increased or your circumstances have changed, the amount you can borrow may differ from the original pre-approval.

What Lenders Assess Beyond Your Income

Lenders assess your ability to service the full loan amount once construction is complete, not just the interest during the build. They use a higher assessment rate than the actual interest rate on offer, typically adding a buffer of three percent. If the loan rate is 6.5 percent, the lender tests whether you can afford repayments at 9.5 percent. This buffer protects both you and the lender if rates rise after the build is finished.

You will also need to demonstrate genuine savings for the deposit unless you are using equity from an existing property. Most lenders require at least five percent of the total project cost to come from savings held for at least three months. Gifted deposits are sometimes accepted if accompanied by a signed declaration from the person providing the funds. If you are building an investment property, the lender will include a percentage of the expected rental income in the servicing calculation, but only after the build is complete.

Buderim buyers often use equity from an existing home to fund the deposit and avoid the need for lenders mortgage insurance. If your current home has increased in value and you have enough usable equity, you can borrow the full land and build cost without needing cash savings. The lender will value both the existing property and the land, then assess the proposed build using the contracted price and completed valuation.

How Progressive Drawing Fees Are Calculated

Each time the lender releases funds to the builder, they charge a progressive drawing fee to cover the valuation and administration. The fee typically ranges from $300 to $500 per drawdown, depending on the lender and location. Over a five-stage build, total drawing fees can reach $2,500. Some lenders cap the number of free drawdowns or include a set number in the loan package, but this varies by product.

The fee is usually deducted from the loan balance rather than paid upfront, so it does not require additional cash at each stage. If you are managing a tight budget, factor these fees into your overall cost estimate alongside council fees, insurance, and any allowances for variations or upgrades during construction.

Converting to a Standard Loan at Completion

Once the final inspection is complete and the occupation certificate is issued, the loan converts from construction funding to a standard home loan. The interest rate may change at this point if the construction rate differed from the ongoing rate, and repayments shift from interest-only to principal and interest unless you have arranged otherwise. Some lenders automatically convert the loan, while others require you to sign a new loan agreement.

If you are building an investment property, this is the point where depreciation schedules, rental income, and tax deductions come into play. If you are building your own home, this is when you can refinance to a different lender if a lower rate or different features are available elsewhere. We regularly see clients lock in construction funding with one lender, then refinance within twelve months to access a lower rate or better offset structure once the home is complete.

What Happens If the Build Costs More Than Expected

If your builder requests additional payment for variations or unforeseen costs that were not in the original contract, the lender will not automatically release extra funds. You will need to apply for a loan variation, which requires a new valuation and serviceability assessment. If the lender does not approve the increase, you will need to cover the shortfall from your own funds.

This situation is more common with renovation projects or builds on sloping land where site costs can exceed initial estimates. In Buderim, where some blocks sit on elevated or steep terrain, site preparation and retaining walls can add tens of thousands to the build cost if not properly scoped during planning. A fixed price contract with a detailed site assessment before signing protects you from most of these surprises, but not all.

If the builder goes into liquidation before the project is complete, your lender will freeze further drawdowns until a replacement builder is engaged. You will need to negotiate a new contract with the replacement builder, and the lender will reassess the project based on the revised cost and timeline. Home warranty insurance, which is mandatory in Queensland for builds over $3,300, covers some of the loss if the builder fails to complete the work, but it does not cover the full contract value in most cases.

Choosing Between Construction and Renovation Funding

Renovation finance works similarly to construction funding, with progressive drawdowns tied to the completion of agreed stages. The difference is that you already own the property, so the loan is assessed against the existing value plus the expected value after renovation. Lenders typically advance up to eighty percent of the improved value, meaning you need to cover the gap between the current value and the total project cost from equity or savings.

If you own a home in Buderim and want to add a second storey or reconfigure the layout to capture views toward the hinterland, a house renovation loan allows you to fund the work in stages without selling and buying elsewhere. The same progress payment structure applies, with inspections at each stage and funds released directly to your builder or directly to you if you are managing sub-contractors under an owner-builder arrangement.

Call one of our team or book an appointment at a time that works for you. We access construction loan options from banks and lenders across Australia, and we will walk you through the application, the drawdown schedule, and the conversion process so nothing catches you by surprise.

Frequently Asked Questions