Top Strategies to Finance a Renovation Purchase

How Construction Finance Works for a Purchase and Renovation

A construction loan for a purchase and renovation covers both the property purchase and the rebuild cost, with funds released progressively as the work is completed. You'll typically need around 10% to 20% deposit calculated on the combined purchase price and construction budget, and the lender will hold back the construction funds until each stage is verified by an inspector.

The structure differs from a standard home loan because you're not borrowing the full amount upfront. The lender releases funds according to a progress payment schedule tied to specific building stages. During construction, you'll generally pay interest only on the amount drawn down so far, not the full loan amount. Once the build is complete, the loan converts to a standard principal and interest home loan, though some borrowers choose to remain on interest-only repayment options for a period.

Consider a buyer who purchases a tired Californian bungalow near Koornang Road for demolition and rebuild. The purchase settles at the agreed price, funded by the loan's purchase component. The construction portion remains undrawn. As the registered builder completes the slab, frame, lock-up, fixing, and practical completion stages, the lender releases funds directly to the builder after each progress inspection. The buyer pays interest only on what's been drawn, so in the early months when only the slab is complete, the interest cost remains modest compared to what it would be on the full loan amount.

Fixed Price Building Contract and Progress Payments

Most lenders require a fixed price building contract before approving construction finance. This document sets out the total build cost, the scope of work, and the progress payment schedule. The contract protects both you and the lender by locking in the price and defining exactly what will be delivered at each stage.

The progress payments typically align with five or six key milestones: base stage, frame stage, lock-up, fixing, practical completion, and final completion. Each payment represents a portion of the total contract price. The lender will only release funds after their valuer or inspector confirms that stage has been reached. This structure means you're not paying for work that hasn't been done, and the builder receives payment as they complete each phase.

If you're working with an owner builder arrangement rather than a registered builder, expect the approval process to be more involved. Many lenders either decline owner builder finance outright or charge higher interest rates and require larger deposits. The lender sees more risk because there's no builder's warranty insurance and no third party managing the project timeline.

What Lenders Look for in a Purchase and Renovation Application

Lenders assess both your borrowing capacity and the project's viability. They'll want to see council approval for the development application, detailed plans, a fixed price contract with a licensed builder, and a realistic construction timeline. The valuer will assess the property's value both as it stands now and its expected value once the build is complete.

The as-complete valuation matters because it determines how much the lender is willing to fund. If the combined purchase price and construction cost is $900,000 but the as-complete valuation comes in at $850,000, you're purchasing and building above the end value. Most lenders will either decline that scenario or ask you to contribute more deposit to bring the loan-to-value ratio down.

In Carnegie, where period homes on larger blocks are common, lenders are generally comfortable with knockdown-rebuild projects because the land value is well established. The suburb sits close to Carnegie Station and has seen steady demand for modern, energy-efficient homes on those traditional quarter-acre blocks. A well-planned rebuild with quality construction will usually meet or exceed the combined purchase and build cost at valuation, particularly if you're replacing a dated home with something that suits today's buyers.

Construction Draw Schedule and Timing

The construction draw schedule sets out when and how much the lender will release at each stage. You'll see this documented in your loan approval. It typically mirrors the progress payment schedule in your building contract, but the lender adds an inspection requirement before each release.

Once you settle on the property purchase, you'll usually have a set period to commence building. Many lenders require construction to start within six months of settlement. If you delay beyond that, you may need to reapply or accept different loan terms. This timing requirement exists because lenders price construction loans based on current rates and risk settings, and they don't want to hold a commitment indefinitely.

During the build, expect each draw to take a few days to process. The builder requests payment, the lender arranges an inspection, the inspector confirms the stage is complete, and the funds are released. Builders in Melbourne are used to this rhythm, but it's worth making sure your builder understands the process and submits drawdown requests promptly. Delays in requesting draws can slow the project and create cash flow issues for the builder, which can flow back to your timeline.

Renovation Finance for Partial Builds and Extensions

If you're buying a structurally sound home that needs a significant renovation or extension rather than a full knockdown, the loan structure remains similar but the construction component may be smaller. The same principles apply: the lender holds back the renovation funds, releases them progressively, and you pay interest only on the drawn portion until the work is done.

Partial renovation projects can be harder to finance if the home isn't liveable at settlement. Some lenders won't approve a loan if the property doesn't have a working kitchen, bathroom, and weatherproof structure at the time you take ownership. If you're buying a house that's partially demolished or uninhabitable, make sure your broker knows upfront so they can connect you with lenders who handle those scenarios.

Properties around Carnegie's Murrumbeena Road precinct, where some of the older homes haven't been updated in decades, often fall into this category. A buyer might purchase a solid brick home with good bones but outdated interiors, then fund a full internal renovation and rear extension. The loan covers the purchase and the renovation cost, with funds released as the plumbers, electricians, and builders complete their stages. Once the renovation is finished, the home converts to a standard home loan repayment structure.

Cost Plus Contract and How It Affects Approval

A cost plus contract means the builder charges you for the actual cost of materials and labour, plus a margin. The final price isn't fixed at the start. Most mainstream lenders won't accept cost plus contracts for construction finance because they can't assess the total loan amount required or control the final cost.

If your builder is only offering a cost plus arrangement, you'll need to either negotiate a fixed price contract or work with a specialist lender who handles these projects. The interest rate will typically be higher, and you'll need a larger deposit. The lender may also cap the loan amount at a conservative figure and require you to cover any cost overruns from your own funds.

In our experience, buyers who start with a cost plus builder and then try to arrange finance often find themselves stuck. The solution is to engage a builder who works with fixed price contracts from the outset, or to accept that the financing will cost more and take longer to arrange.

Interest Rate and Fees on Construction Finance

Construction loan interest rates are usually comparable to standard variable home loan rates, though some lenders add a small margin during the construction phase. You'll also encounter a Progressive Drawing Fee, which covers the cost of inspections and administration each time the lender releases funds. This fee typically ranges from $200 to $400 per draw, and with five or six draws over the course of the build, it adds up.

Some lenders charge a flat fee for all progress inspections upfront, while others charge per draw. Make sure you understand the fee structure before you commit, because it affects your overall project budget. If you're comparing loan offers, look at both the interest rate and the total fees over the construction period.

Once construction is complete and the loan converts to a standard home loan, you can refinance if you find a lower rate elsewhere. Many borrowers stay with their construction lender for convenience, but there's no obligation to do so. Just keep in mind that if you refinance immediately after completion, you'll be paying discharge fees and application fees for the new loan, which can outweigh the rate benefit unless the saving is substantial.

Appointing the Right Builder and Managing the Project

Your lender will want to see that you've appointed a registered builder with adequate insurance and a solid track record. They'll usually ask for the builder's license details, insurance certificate, and a copy of the contract. If the builder isn't registered or doesn't carry the required insurance, the lender will decline the application.

Managing the build means staying in contact with the builder, responding to any variations or decisions quickly, and making sure drawdown requests are submitted on time. Delays in decision-making or material selection can push out the timeline, which increases your interest cost and sometimes triggers extension fees from the lender if the construction period exceeds the original approval term.

If your project involves custom design rather than a standard project home, expect more questions from the lender. Custom builds take longer and cost more, and the lender will want assurance that the builder has experience with that type of work. The valuer will also assess whether the custom design suits the local area. A ultra-modern home in a street of period cottages might not value as well as a sympathetic contemporary design that fits the neighbourhood character, and that will affect how much the lender is willing to lend.

When to Start the Construction Loan Application

Start your construction loan application once you have council plans and a fixed price building contract. Some buyers try to get pre-approval before they've secured a builder, but most lenders won't issue a formal approval without seeing the contract and plans. What you can do early is confirm your borrowing capacity and get an indicative approval based on estimated build costs.

If you're buying a property at auction or in a competitive off-market situation, you'll need to move quickly once your offer is accepted. Having a broker who understands construction finance and can turn around an application in a few days makes a tangible difference to your ability to meet standard settlement terms.

For buyers in Carnegie looking at land and construction packages or planning to purchase and renovate, working with a mortgage broker in Carnegie, VIC who knows the local market and which lenders handle these projects efficiently can shorten the timeline and reduce the back-and-forth.

Call one of our team or book an appointment at a time that works for you. We'll walk through your purchase and renovation scenario, confirm what lenders will support the project, and make sure the loan structure fits both the build timeline and your long-term plans.

Frequently Asked Questions