How construction loans differ from standard home lending
A construction loan releases funds in stages as your build progresses, not as a lump sum at settlement. You only pay interest on the amount drawn down at each stage, which means your repayments start small and increase as more money is released to your builder. Most lenders structure these as interest-only during construction, switching to principal and interest once the build is complete and you move into a standard home loan.
The process involves a valuer inspecting the site at each stage before the lender releases the next payment to your builder. These inspections confirm that the work matches the stage described in your contract and that the amount being claimed is reasonable. If the valuer identifies incomplete work or quality concerns, the drawdown can be delayed until those issues are resolved.
For sole traders in Sydney, the main difference from a purchase loan is timing and income verification. Lenders want to see at least two years of tax returns showing consistent income, and they may apply a loading or discount to your declared earnings depending on your industry and how your accountant structures your return. If your most recent year shows a significant drop compared to the prior year, some lenders will average the two, while others will only use the lower figure.
Council approval and timing requirements for knockdown rebuilds
Most lenders require a development application approval from council before they will formally approve your construction loan. If you are in an area where the knockdown rebuild falls under complying development, you can often proceed with a complying development certificate instead, which speeds up the process. Either way, the lender needs proof that the project is legally approved before they commit funds.
Once your loan is approved and contracts are signed, you will typically need to commence building within six months from the disclosure date. If construction has not started within that window, the lender may require you to reapply or provide updated income and valuation evidence. This is particularly relevant for sole traders whose income can fluctuate, as a delay in starting the build could mean you no longer meet the lender's serviceability criteria if your recent income has dropped.
In areas like the Inner West or Northern Beaches, council processing times can stretch beyond three months, so it makes sense to start the development application process early and keep your broker updated on progress. If you are waiting on council and your loan pre-approval is approaching expiry, your broker can request an extension with updated documentation rather than starting from scratch.
Fixed price building contracts and cost plus arrangements
Lenders strongly prefer fixed price building contracts because they know exactly how much will be drawn and when. A fixed price contract lists every stage of the build with a corresponding dollar amount, and the builder cannot claim more than that amount without a formal variation approved by you and the lender. This protects both you and the lender from cost blowouts.
Cost plus contracts, where you pay the builder's actual costs plus a margin, are harder to finance and usually only accepted for owner builders or unique projects where a fixed price is not realistic. If you are using a cost plus arrangement, expect the lender to apply a higher interest rate or require a larger deposit, and be prepared to provide detailed quotes and costings at every stage.
Consider a sole trader purchasing a property in Marrickville to knock down and rebuild. The land costs $1.4 million, and the fixed price building contract is $650,000. The lender values the completed project at $2.3 million. The borrower has a 15% deposit, which covers the land purchase and leaves a small buffer. The lender structures the loan with the land component settling first, then releases construction funds over five stages: slab, frame, lockup, fixing, and completion. At slab stage, the builder claims $130,000. The valuer inspects, confirms the slab is complete and complies with council plans, and the lender releases the funds. This repeats at each stage until the final inspection, when the loan converts to a standard variable or fixed rate home loan.
Progressive drawdown and how interest accrues during the build
Interest is calculated daily on the amount you have drawn, not the total approved loan amount. At slab stage, if you have drawn $130,000, you are only paying interest on that $130,000. As each stage is completed and more funds are released, your interest repayment increases. This keeps your repayments lower during construction compared to a traditional loan where you borrow the full amount upfront.
Most lenders offer interest-only repayment options during construction, which means you are only covering the interest charge each month without reducing the principal. Once the build is finished and the final drawdown is made, the loan converts to principal and interest repayments based on the full amount borrowed. Some lenders allow you to make additional payments during construction to reduce the principal early, but this is not common and depends on the loan product.
The progressive drawdown schedule is controlled by your building contract. If your builder delays a stage or the valuer identifies defects, the next payment will not be released until the issue is fixed. This can create cash flow problems for the builder and delay the overall project, so it is important to work with a registered builder who understands the lender's inspection process and prepares each stage properly before requesting payment.
How lenders assess sole trader income for construction finance
Lenders treat sole trader income differently to PAYG wage earners. Most require two full years of tax returns, and they apply a serviceability test based on your net profit after deductions, not your gross turnover. If your accountant has structured your return to minimise tax by claiming maximum deductions, this can reduce your borrowing capacity because the lender sees a lower declared income.
Some lenders will add back certain deductions like depreciation or one-off expenses to give you credit for earning capacity that does not reflect ongoing costs. Others take a more conservative approach and only use the net figure shown on your notice of assessment. If your income has been affected by industry downturns or large one-off expenses in the most recent year, your broker can present your application to lenders who allow explanations and supporting evidence rather than relying purely on the tax return figure.
For construction loans, lenders also want to see that you can service both the construction interest payments and the final principal and interest repayments once the build is complete. If you are currently renting and plan to move into the new home, they will factor in the elimination of rent as an offset. If you already own a home and plan to sell it once the new build is finished, some lenders will allow you to exclude the existing mortgage from serviceability, provided you can show a clear plan to sell and evidence that the property is marketable.
Progress inspections and working with valuers and builders
Every time your builder requests a progress payment, the lender sends a valuer to inspect the site. The valuer checks that the stage is complete according to the contract, that the quality meets industry standards, and that the amount being claimed is reasonable. If the valuer finds that only 80% of the framing stage is complete but the builder is claiming 100%, the lender will either release a proportional amount or hold the payment until the work is finished.
This process protects you from paying for incomplete work, but it also means your builder needs to be organised and communicate clearly with you and the lender. Builders who regularly work with construction lenders understand the inspection requirements and prepare each stage accordingly. Builders who are unfamiliar with the process can cause delays if they request payment before the work is actually complete or if they do not provide access for the valuer.
In Sydney, where construction activity is high and valuers are in demand, inspections can take several days to arrange. If your builder is waiting on a drawdown to pay subcontractors like plumbers or electricians, a delay in the inspection can hold up the entire schedule. Your broker can help by keeping in contact with the lender's construction team and ensuring that inspections are booked promptly once the builder confirms a stage is ready.
When the loan converts and what happens at practical completion
Once the final stage is complete and the valuer has conducted the last inspection, the lender releases the final drawdown and converts the loan to a standard home loan product. At this point, your repayments switch from interest-only on the drawn amount to principal and interest on the full loan balance. The interest rate may also change if you were on a construction-specific rate during the build.
Practical completion is the trigger for this conversion. It means the builder has finished all major work, the property is habitable, and any minor defects are documented in a defects list for the builder to rectify during the defects liability period. The lender does not wait for every minor defect to be fixed before converting the loan, but they do require confirmation from the valuer that the property is complete and liveable.
If you have been living elsewhere during the build and plan to move into the new home, the timing of practical completion affects when you can stop paying rent or when you need to sell your existing property. Some buyers try to time the sale of their current home to coincide with practical completion so they can use the sale proceeds to reduce the construction loan and avoid holding two properties. Others prefer to keep the existing property as an investment loan and rent it out, in which case the rental income can help service the new loan.
Choosing between a construction loan and a land and construction package
A land and construction package combines the land purchase and the building contract into a single loan with a single approval. This can simplify the process if you are buying a house and land package from a developer, but it offers less flexibility if you want to choose your own builder or make changes to the design after purchasing the land.
If you already own the land or are buying the land separately, a standalone construction loan gives you full control over the building contract and the builder you engage. You can negotiate the contract terms, choose your own finishes, and make variations during construction without needing the developer's approval. The trade-off is that the approval process can take longer because the lender needs to assess the land value, the building contract, and your capacity to service the combined loan.
For sole traders, a standalone construction loan also allows you to stage the purchase and the build in a way that matches your cash flow. If you buy the land first and wait six months before starting the build, you can use that time to build up additional savings or complete another tax year to strengthen your income position. With a house and land package, the developer usually requires you to commence building within a set period, which can create pressure if your income fluctuates or if you need more time to arrange finance.
Progressive payment fees and other costs specific to construction lending
Lenders charge a progressive drawing fee each time they release funds to your builder. This fee covers the cost of the valuer's inspection and the lender's administration. It typically ranges from $300 to $500 per drawdown, and with five or six stages in a standard build, the total cost can reach $2,500 to $3,000. Some lenders cap the fee or include a set number of inspections in the loan package, so it is worth comparing this cost alongside the interest rate when choosing a lender.
In addition to the progressive drawing fee, you will also pay standard loan costs like application fees, valuation fees, and legal fees. The valuation fee for a construction loan is often higher than for a standard purchase because the valuer needs to assess both the land value and the proposed build, using the building contract and council plans to estimate the completed value.
If you are refinancing an existing property to fund the knockdown rebuild, you may also face discharge fees from your current lender and new establishment fees from the construction lender. Your broker can help you model these costs and determine whether refinancing is more cost-effective than using savings or selling another asset. In some cases, a loan health check on your existing lending can identify opportunities to restructure or consolidate debt before taking on the construction loan, which can improve your serviceability and reduce your overall interest cost.
Call one of our team or book an appointment at a time that works for you to discuss how a construction loan can be structured around your income and project timeline.
Frequently Asked Questions
How does a construction loan differ from a standard home loan?
A construction loan releases funds in stages as the build progresses, and you only pay interest on the amount drawn down at each stage. Standard home loans provide the full amount at settlement, and you start repaying principal and interest immediately.
Do I need council approval before applying for a construction loan?
Most lenders require development application approval or a complying development certificate before they will formally approve your construction loan. You can start the application process earlier, but final approval is usually conditional on council consent.
What is a progressive drawing fee?
A progressive drawing fee is charged by the lender each time they release funds to your builder. It covers the cost of the valuer's inspection and the lender's administration, typically ranging from $300 to $500 per drawdown.
How do lenders assess sole trader income for construction finance?
Lenders require at least two years of tax returns and assess your borrowing capacity based on net profit after deductions. Some lenders will add back certain deductions like depreciation to increase your assessed income.
When does a construction loan convert to a standard home loan?
The loan converts once the final stage is complete and the valuer confirms practical completion. At this point, repayments switch from interest-only on the drawn amount to principal and interest on the full loan balance.
