Avoid These Knockdown Rebuild Loan Mistakes in Camberwell

Knockdown rebuild projects in Camberwell require a different type of finance compared to purchasing an established home.

You are not buying a finished property that can be valued and secured against immediately. Instead, you are funding a staged construction process on land you already own or are purchasing, and that changes how lenders assess risk, structure repayments, and release funds. If you treat this like a standard home loan application, you will run into problems.

Mistake One: Applying for the Wrong Type of Loan

A knockdown rebuild requires a construction loan, not a standard home loan. A construction loan releases funds in stages as your build progresses, meaning you only pay interest on the amount drawn down at each stage. Most lenders offer a construction to permanent loan structure, which converts automatically to a standard home loan once the build is complete and you have received your certificate of occupancy.

Consider a buyer who owns a 1950s brick home in Camberwell near the intersection of Burke Road and Riversdale Road. The home is dated, and the block is large enough to support a modern family home with better use of space. They want to demolish and rebuild. If they applied for a standard home loan, the bank would value the land and existing dwelling but would not release additional funds to cover demolition or construction. The loan would need to be structured as a land and construction package from the outset, with the total loan amount approved upfront and funds released progressively as the builder completes each stage.

Without this structure in place, construction cannot commence, and the project stalls before demolition even begins.

Mistake Two: Underestimating How Long Council Approval Takes

You cannot draw down construction funds until you have council approval and a fixed price building contract in place. In Boroondara, where Camberwell sits, development applications for knockdown rebuilds can take several months depending on the design, site constraints, and whether objections are lodged by neighbours. If your loan has a condition that you must commence building within a set period from the disclosure date, and council approval drags on, you may need to reapply or extend your approval, which can delay the entire project.

This becomes a real issue when buyers assume a three-month turnaround and council takes five. The holding costs on the land during that period add up, and if you are living elsewhere while waiting, you may be paying rent or a second mortgage at the same time.

Mistake Three: Not Understanding the Progress Payment Schedule

Construction loans operate on a progressive drawdown basis. The lender releases funds according to a progress payment schedule tied to construction milestones such as base stage, frame stage, lock-up, fixing, and completion. Each stage triggers a progress inspection by the lender or a third-party valuer before the next payment is authorised. You do not control the timing of these payments, the builder does, and the lender will only release funds once they are satisfied the stage has been completed to a sufficient standard.

In a scenario where your builder requests payment for the frame stage but the lender's valuer identifies incomplete work or missing compliance, the drawdown is delayed. If your builder has already paid sub-contractors or suppliers in anticipation of that payment, the relationship becomes strained. Some builders will not proceed until they receive payment, creating a standoff that adds weeks to the timeline.

Most lenders charge a progressive drawing fee each time funds are released, typically between $300 and $500 per drawdown. Over five or six stages, this adds up. Factor these costs into your budget from the outset rather than discovering them halfway through the build.

Mistake Four: Choosing the Wrong Builder or Contract Type

Lenders will only approve construction finance if you are working with a registered builder under a fixed price building contract. Owner builder finance is available, but it is harder to obtain, comes with stricter conditions, and usually requires a larger deposit. If you plan to act as an owner builder to save on building costs, expect lenders to assess your experience and capacity to manage the project, and many will decline the application outright.

A fixed price contract protects both you and the lender by setting a clear budget and timeline. A cost plus contract, where you pay the builder's costs plus a margin, creates uncertainty around the final loan amount and makes it difficult for lenders to assess whether the project is financially viable. Most mainstream lenders will not touch a cost plus arrangement for a knockdown rebuild.

If your builder is not registered or does not hold adequate insurance, your application will be declined regardless of how well-prepared the rest of your documentation is.

Mistake Five: Ignoring the Interest-Only Repayment Structure During Construction

During the construction phase, most lenders offer interest-only repayment options on the amount drawn down. You are not required to make principal repayments until the loan converts to a standard home loan after completion. However, because funds are released progressively, your interest charges increase with each drawdown.

At the start of construction, you might only be paying interest on the land value and the first stage payment. By lock-up, you could be paying interest on 70% or 80% of the total loan amount. If the build runs over time due to weather, supply delays, or builder scheduling, those additional months of interest accumulate. Budget for at least six months of construction and factor in interest costs across the full loan amount, not just the initial drawdown.

Some buyers attempt to continue living in the existing home during demolition and early construction to avoid paying rent elsewhere. This is rarely feasible once demolition begins, and most council plans require the site to be vacant and secured during major works.

Mistake Six: Not Accounting for the Deposit and Upfront Costs

Lenders typically require a deposit of at least 10% to 20% of the total project cost, which includes the land value and the full cost of construction. If you already own the land, the equity in that land can contribute to your deposit. If you are purchasing the land as part of the project, you will need genuine savings or equity from another property to meet the deposit requirement.

In addition to the deposit, you will need to cover upfront costs such as council application fees, demolition costs, site works, and any additional payments required by the builder before construction begins. These costs are often excluded from the construction loan and must be paid from your own funds. For a knockdown rebuild in Camberwell, where land values are high and council requirements can be detailed, these upfront costs can reach tens of thousands of dollars.

If you do not have sufficient cash on hand to cover these costs, the project cannot proceed, even if your loan is approved.

How to Structure Your Application to Avoid These Mistakes

Before you approach a lender, have your council plans approved or at least lodged, a fixed price building contract signed with a registered builder, and a clear breakdown of all project costs including demolition, site preparation, and finishes. Lenders want to see that the project is viable, that you have thought through the timeline, and that you have enough buffer in your budget to absorb minor cost overruns or delays.

Work with a mortgage broker in Camberwell who understands how construction finance works and can match your project to a lender that offers suitable drawdown terms, competitive construction loan interest rates, and flexibility around timing. Not all lenders handle knockdown rebuilds the same way, and some are far more experienced with this type of project than others.

If you are also considering whether to renovate instead of rebuild, or if you are weighing up a knockdown rebuild against purchasing an established home in a neighbouring suburb, your broker can model both scenarios and show you the real cost difference once land value, construction costs, holding costs, and loan structure are all accounted for.

Knockdown rebuild projects in Camberwell are common, particularly on larger blocks close to Camberwell Junction, where older homes no longer meet the needs of growing families. The process is well understood by local builders and lenders familiar with the area, but the finance structure is specific and requires planning well before demolition begins.

Call one of our team or book an appointment at a time that works for you to discuss how your knockdown rebuild project should be structured and which lenders are the right fit for your timeline and budget.

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