Do you know how construction loans work for renovations?

What Is a Construction Loan for a Renovation Purchase?

A construction loan for a renovation purchase is a finance product that allows you to buy a property and fund major structural changes under a single facility. The lender advances funds in stages as work progresses, rather than releasing the full amount at settlement.

This structure differs from a standard home loan because the security value increases over time. When you purchase a property requiring extensive renovation, the initial market value may be lower than what the completed project will be worth. Lenders manage this risk by releasing funds progressively and requiring evidence of completed work at each stage. The loan typically converts to a standard variable or fixed rate product once construction is complete and the property is revalued.

Consider a purchaser buying an older home in Mandurah for renovation. The property sells at a lower price because it requires a new kitchen, bathroom upgrades, and structural repairs. Rather than taking out a separate personal loan or line of credit for the works, a construction loan allows the buyer to finance both the purchase and the renovation through one application. The lender assesses the combined risk based on the end value, not just the purchase price.

How Does the Progressive Drawdown Work?

Funds are released in instalments based on a progress payment schedule agreed at the start of the loan. Each drawdown is tied to a specific stage of construction, such as foundation work, frame completion, or final fit-out.

Before each payment, the lender arranges a progress inspection to confirm the work has been completed to the required standard. Once approved, the funds are released directly to the builder or to your account if you are managing payments. You only pay interest on the amount drawn down, not the full approved loan amount. This reduces your repayment burden during the construction period.

In practice, a typical renovation project might involve four to six drawdowns. The first release covers initial demolition and structural work. Subsequent payments follow as plumbing and electrical rough-ins are completed, then internal fit-out, and finally external finishes and landscaping. Each stage must be signed off before the next payment is made. Some lenders charge a progressive drawing fee for each inspection, which can range from a few hundred dollars per visit depending on the lender and location.

What Approvals Do You Need Before Drawdown?

You need council approval for the renovation works and a fixed price building contract with a registered builder before the lender will release funds. These documents form the basis of the loan agreement.

The council approval confirms the proposed works comply with local planning and building codes. Without this, the lender cannot assess the legal risk of the project. The building contract must specify the scope of work, total cost, and payment milestones. A cost plus contract, where the final price is not fixed, is typically not acceptable to lenders because it introduces uncertainty around the final loan amount.

If you are purchasing a property in Mandurah that requires significant structural changes, expect the council to require detailed plans and possibly engineering certification. This is particularly relevant for properties near the waterfront or in older parts of the suburb where heritage considerations may apply. Your builder or architect will manage the development application, but the lender will not proceed until council approval is documented.

Can You Use a Construction Loan as an Owner Builder?

Most mainstream lenders do not offer construction loans to owner builders because the risk of project delays or incomplete work is higher. Specialist lenders may consider owner builder finance, but they typically require more equity and charge a higher interest rate.

If you plan to manage the renovation yourself, expect to provide evidence of relevant building experience and to accept more stringent loan conditions. The lender may require a higher deposit, more frequent inspections, and detailed project documentation. Some lenders cap the loan amount or restrict the types of work that can be funded under an owner builder arrangement.

In our experience, buyers who lack formal building qualifications but want to manage the project closely often achieve a better outcome by engaging a registered builder under a fixed price contract and staying involved as project manager. This allows access to standard construction loan products while maintaining control over timelines and quality.

How Do Interest Charges Apply During Construction?

You are charged interest only on the funds drawn down at each stage, not on the total approved amount. Repayments during construction are typically interest-only, with principal and interest repayments commencing once the project is complete.

This structure keeps your costs lower during the build period when you may also be paying rent or a mortgage on another property. Once the final drawdown occurs and the property is revalued, the loan converts to a standard repayment schedule. The interest rate during construction may be variable or fixed depending on the product you choose, and some lenders offer the option to lock in a fixed rate for the construction period.

For a renovation project in Mandurah with an approved loan amount covering both purchase and construction, you might draw down the purchase amount at settlement, then progressively draw the renovation funds over six months. Your repayments in the first few months are lower because the construction portion has not yet been released. As each stage is completed and more funds are drawn, your repayments increase incrementally.

What Happens If the Project Runs Over Budget?

If construction costs exceed the original contract amount, you will need to fund the difference from your own resources unless you can demonstrate that the increased value justifies a higher loan amount. Lenders do not automatically increase the approved loan mid-project.

Cost overruns are a common issue in renovation projects, particularly when unexpected structural issues are uncovered during demolition. If your builder identifies additional work required, you will need to negotiate a contract variation and either pay the extra cost yourself or apply for a loan increase. The lender will reassess the end value and your borrowing capacity before approving any increase.

To manage this risk, experienced buyers include a contingency allowance in their budget, typically around ten percent of the construction cost. This provides a buffer for unforeseen expenses without needing to return to the lender mid-project. If you are renovating an older property in Mandurah, factor in the possibility of asbestos removal, electrical upgrades, or plumbing repairs that may not be visible during the initial inspection.

Do All Lenders Offer Construction Loans for Renovations?

Not all lenders provide construction finance for renovation purchases, and those that do have different criteria around property types, loan amounts, and borrower experience. Some lenders only offer construction loans for new builds or house and land packages, not for renovations.

When comparing lenders, consider factors such as the number of free progress inspections included, whether the lender charges a progressive drawing fee for each payment, and the flexibility around contract variations. Some lenders require you to commence building within a set period from the disclosure date, which can be challenging if council approval is delayed.

Working with a mortgage broker allows you to access construction loan options from banks and lenders across Australia, including those who specialise in renovation finance. A broker can also help structure the loan to align with your project timeline and ensure you meet the lender's requirements before submitting the application.

How Much Deposit Do You Need?

Most lenders require a deposit of at least ten to twenty percent of the combined purchase price and construction cost. Some will accept a smaller deposit if you have genuine savings or equity in another property, but this typically attracts lenders mortgage insurance.

The deposit requirement reflects the higher risk associated with construction lending. The lender is funding a project that does not yet have its final value, so they require more equity upfront to protect their position. If you are using equity from an existing property to fund the deposit, the lender will assess your overall borrowing capacity based on your ability to service both loans during construction.

In a scenario where you are purchasing a renovation project in Mandurah, you might negotiate a purchase price that reflects the property's current condition, then budget for the renovation works separately. If the combined cost is within your borrowing capacity and you have the required deposit, a construction loan allows you to complete the purchase and renovation without needing to refinance later.

Call one of our team or book an appointment at a time that works for you to discuss your renovation finance options and confirm which lenders will support your project.

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