Common Mistakes When Financing an Extension

A construction loan for an extension works differently to standard home finance, and most lenders will only approve one if you have a fixed price building contract, council approval in place, and a registered builder ready to start.

If you own a property in Croydon and you're planning to add a second storey, extend the living area, or build a granny flat, you'll need finance that releases funds progressively as the build moves forward. Unlike a traditional home loan where the full amount is paid upfront, construction loans release funds in stages, tied to inspections and milestones. That means you're only charged interest on the amount drawn down at each stage, not the full loan amount from day one.

You Cannot Draw Down Until Council Approval Is Finalised

Most lenders require a finalised development application and council approval before they'll release the first drawdown. Some borrowers assume they can lock in finance early and sort out the council plans later, but that's not how it works. The lender needs to see the approved plans, the fixed price building contract, and confirmation from a registered builder before the loan can settle.

Consider a homeowner extending a weatherboard home near Croydon station. The builder is ready to start, the contract is signed, but the council approval is still pending due to an issue with the setback from the rear boundary. The lender won't release any funds until that approval is finalised. The project gets delayed by six weeks, and the builder moves on to another job. By the time council signs off, the builder's schedule has shifted and the start date moves out another month. That delay could have been avoided by getting the development application finalised before applying for finance.

Owner Builder Finance Is Difficult to Secure

If you're planning to manage the build yourself as an owner builder, most mainstream lenders won't touch it. They want a registered builder with insurance and a fixed price contract. Owner builder finance does exist, but it's usually offered by specialist lenders at a higher interest rate, with stricter conditions around drawdowns and inspections.

You'll also need an owner builder permit from the Victorian Building Authority, and you'll have to prove you can manage the project, pay sub-contractors on time, and coordinate plumbers, electricians, and inspectors. If you can't show that level of capability, the lender will decline the application outright.

Fixed Price Contracts Protect Both You and the Lender

A cost plus contract, where the builder charges for materials and labour with a margin on top, is almost impossible to finance with a construction loan. Lenders need certainty around the final build cost, and they get that through a fixed price building contract. That contract should break down the total cost, the progress payment schedule, and the stages at which each drawdown will be released.

Without a fixed price contract, the lender has no way to assess whether the project is financially viable or whether the loan amount will cover the full build. If the builder is quoting on a cost plus basis, you'll need to ask them to convert it to a fixed price before you apply for finance.

The Progress Payment Schedule Determines When Funds Are Released

Most construction loans follow a progressive drawdown schedule tied to the stages of the build. Common stages include slab down, frame up, lockup, fixing, and completion. At each stage, the lender arranges a progress inspection to confirm the work has been completed to the required standard, then releases the next instalment.

If the inspection reveals that the work isn't up to standard, or if the builder has skipped ahead without completing the previous stage properly, the drawdown gets delayed. That can cause cashflow issues for the builder and slow down the project. It's worth making sure the builder understands the lender's progress payment schedule and agrees to work within it before you sign the contract.

You'll Pay a Progressive Drawing Fee at Each Stage

Every time the lender releases funds, they charge a progressive drawing fee to cover the cost of the inspection and administration. That fee is usually between $300 and $500 per drawdown, depending on the lender. Over a five-stage build, that adds up to around $1,500 to $2,500 in additional costs.

Some borrowers don't factor this into their budget and end up short when it comes time to pay the builder for the final stage. Make sure you account for these fees when you're working out how much you need to borrow.

Construction Loans in Croydon Often Involve Character Homes

Croydon has a mix of weatherboard cottages, brick homes from the 1970s, and newer builds closer to Eastfield and Warranwood. If you're extending a character home, the lender will want to see that the extension matches or complements the existing structure. They'll also want confirmation that the existing home is in good condition, because if the roof is sagging or the stumps are rotting, they'll see the project as higher risk.

Some lenders will ask for a pre-approval valuation before they commit to the loan, especially if the property is older or if the extension will significantly change the layout. If the valuation comes in lower than expected, you might need to increase your deposit or reduce the scope of the build.

Interest-Only Repayment Options Keep Costs Down During the Build

Most construction loans offer interest-only repayment options during the build phase, so you're only paying interest on the amount drawn down, not making principal repayments. Once the build is complete, the loan converts to a standard home loan with principal and interest repayments.

That structure keeps your repayments lower while the project is underway, which is helpful if you're still paying rent or living elsewhere during the build. Once you move in and the loan converts, your repayments will increase, so make sure you've budgeted for that shift.

Lenders Expect You to Commence Building Within a Set Period

Most construction loan approvals include a condition that you must commence building within a set period from the disclosure date, usually around six months. If you don't start within that window, the approval expires and you'll need to reapply. That means you need to have your builder lined up, your council approval finalised, and your contract signed before you apply for finance.

If you're still shopping around for builders or waiting on quotes, it's too early to apply for the loan. Get the project shovel-ready first, then submit the application.

If you're planning an extension in Croydon and you need help working out which lenders will support your project, or you want to understand how the progressive drawdown works for your specific build, call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions