Everything You Need to Know About Home Loans for Renovations

Renovation Finance Works Differently to Your Original Home Loan

Renovation finance lets you borrow additional funds against your property's equity without refinancing your entire mortgage. You can access renovation funds through a construction loan top-up, a separate split loan, or by restructuring your existing home loan to release equity. The option that works for you depends on how much equity you hold, whether your current rate is worth keeping, and how your lender structures their loan products.

Consider a dental assistant who purchased three years ago and now wants to add a second bathroom and update the kitchen. The existing mortgage sits at a fixed rate locked in before recent rate rises. Refinancing the entire loan would mean losing that rate advantage. Instead, a split loan structure keeps the original loan untouched and adds a second variable rate loan for the renovation amount. The variable portion can be drawn as needed during construction, and the fixed portion continues on its original terms.

Most lenders will lend up to 80% of your property's current value without requiring Lenders Mortgage Insurance. If your property has increased in value since purchase, that equity becomes available for renovation without needing to save a separate deposit. The lender orders a valuation, calculates 80% of that figure, subtracts your current loan balance, and the difference is what you can access. In practice, you might owe $420,000 on a property now valued at $650,000. At 80% LVR, you could borrow up to $520,000, which gives you $100,000 in available equity before LMI applies.

How Construction Draw-Down Loans Work for Renovations

A construction draw-down loan releases funds in stages as the renovation progresses, not as a lump sum upfront. The lender typically structures payments around key milestones such as slab completion, frame and roof, lock-up stage, fixing stage, and practical completion. Your builder submits progress claims, the lender inspects the work, and funds are released directly to the builder or into your nominated account.

This structure protects both you and the lender. You only pay interest on the amount drawn, not the full approved loan amount. If the builder walks off site or disputes arise, the lender holds back remaining funds until issues are resolved. During construction, most lenders allow interest-only repayments on the draw-down portion, which keeps cash flow manageable while you're still living in the property or covering temporary accommodation costs.

For smaller renovations under $50,000, some lenders skip the staged draw-down and release funds as a single amount. The trade-off is you pay interest on the full sum from day one, even if the work takes three months to complete. For anything structural or involving council approval, expect the staged approach.

Using an Offset Account to Manage Renovation Costs

An offset account linked to your variable rate loan portion reduces the interest you pay without locking funds away. Every dollar in the offset account reduces the balance on which interest is calculated. If you have $15,000 sitting in an offset and your loan balance is $100,000, you only pay interest on $85,000.

This becomes useful during renovations when you might receive funds from the lender but need to hold them temporarily before paying the builder. Keeping those funds in an offset account rather than your everyday transaction account means they're working to reduce your interest bill while you wait for the next invoice. It also gives you flexibility to redirect those funds if plans change or unexpected costs emerge, without needing to reapply for additional lending.

Not all home loan packages include a full offset account. Some lenders offer partial offsets that only reduce interest on a percentage of the balance, usually 40% to 60%. Others charge a higher interest rate or annual fee for offset functionality. Before restructuring your loan, confirm whether the offset is full or partial and whether the rate difference justifies the feature for your circumstances.

Fixed Rate vs Variable Rate for Renovation Lending

Lenders rarely offer fixed rates on construction or renovation draw-down loans because the loan balance changes as funds are released. Fixed rates apply to a set loan amount, and the administrative burden of recalculating fixed terms after each draw makes them impractical for staged lending. Most renovation finance defaults to a variable rate, at least until construction completes.

Once the renovation is finished and the full loan amount is drawn, you can convert that portion to a fixed rate if your lender allows it. Some lenders let you fix the renovation loan at that point without refinancing. Others require you to move the debt to a new fixed rate product, which might involve discharge and establishment fees. The variable rate period during construction typically lasts three to six months for most domestic renovations, longer if the project involves significant structural work or council delays.

If your existing loan is already on a variable rate and you're adding a renovation top-up, you could split the combined debt into fixed and variable portions after construction. This gives you rate certainty on part of the loan while keeping flexibility on the rest. A split loan structure also lets you make extra repayments against the variable portion without penalty, which is useful if you receive a bonus or overtime payment and want to reduce the renovation debt quickly.

When Refinancing the Entire Loan Makes Sense

Refinancing to release equity and fund renovations works when your current interest rate is higher than what's available in the market, or when your existing loan lacks features you now need. If you're paying a rate that's 0.5% or more above current variable rates, the interest saving from refinancing might outweigh the cost of breaking a fixed rate or paying discharge fees.

Refinancing also makes sense when you want to consolidate debt. If you're carrying credit card balances, a car loan, or other personal debt, rolling that into a refinanced home loan at a lower interest rate reduces your monthly commitments. The debt doesn't disappear, but the interest rate drops from 10% or 15% to whatever your home loan rate is, and the repayment term extends to match your mortgage. For a dental assistant managing shift work income, lower monthly repayments can improve cash flow even if the total interest paid over the life of the loan increases.

The cost of refinancing includes discharge fees from your current lender, application and valuation fees with the new lender, and potentially government charges depending on your state. In most cases, expect to pay between $1,500 and $3,000 to refinance. Some lenders offer refinance cashback incentives that offset these costs, but those deals usually come with rate discounts that revert after a year or two, so compare the ongoing rate rather than the upfront incentive.

Borrowing Capacity and Serviceability for Renovation Loans

Lenders assess your ability to service a renovation loan the same way they assess any home loan application. They calculate your income, subtract your living expenses and existing debts, and determine how much you can afford to repay. For dental assistants, income assessment can vary depending on whether you're permanent part-time, casual, or receiving penalty rates and allowances.

Most lenders require at least three months of payslips and will average your income over that period. If your hours fluctuate, they might take a more conservative view and use your lowest regular income rather than including occasional overtime. Some lenders accept a letter from your employer confirming your ongoing hours and base rate, which can help if your recent payslips don't reflect your usual income pattern.

Renovation lending doesn't typically increase your borrowing capacity as much as other property purchases because the loan amount is added to your existing debt. If you're already near your serviceability limit, accessing additional funds for renovations might require a co-borrower or guarantor, or waiting until your income increases or your existing loan balance reduces. The lender also considers the end value of the property after renovation, not just the current value. If the renovation adds significant value and improves the loan to value ratio, that can work in your favour.

Practical Considerations Before You Apply

Before applying for renovation finance, get at least two quotes from licensed builders and make sure the scope of work is clearly documented. Lenders want to see a detailed breakdown of costs, not a single-line estimate. If the quote includes a contingency amount for unforeseen work, some lenders will exclude that from the approved loan amount and only release those funds if the work is actually required.

You also need council approval or a complying development certificate for structural work, additions, or anything that changes the building footprint. Lenders won't release funds without sighting the relevant approval. For cosmetic renovations like kitchens, bathrooms, or flooring, council approval usually isn't required, but you still need quotes and a clear schedule of works.

Check whether your builder is licensed and insured, and whether your state requires home warranty insurance for the project. In New South Wales, any residential building work over $20,000 requires the builder to hold warranty insurance. Other states have similar thresholds. Lenders often ask for proof of insurance before approving the loan, particularly for staged draw-downs.

Call one of our team or book an appointment at a time that works for you. We'll review your current loan structure, confirm how much equity you can access, and walk through the options that suit your income pattern and the scope of your renovation.

Frequently Asked Questions