Top tips to refinance & access equity for renovations

Refinancing to access equity locks in two outcomes at once

Refinancing your home loan to access equity gives you the funds for a renovation or second dwelling build while creating an opportunity to review your current rate and loan structure. You're increasing your loan amount, so lenders treat the application as a full refinance rather than a simple top-up, which means they assess your income, property value, and serviceability from scratch.

Consider a homeowner with a property valued at $650,000 and an outstanding loan of $350,000. They want to build a granny flat for around $150,000. Refinancing allows them to increase the loan to $500,000, releasing $150,000 in equity while switching from a variable rate to a fixed rate or consolidating other debts into the mortgage. The lender assesses the combined loan amount against the updated property value and confirms the borrower can service the higher repayment.

Why lenders assess equity release as a full application

When you refinance to access equity, lenders assess the entire loan amount as though you're applying for the first time. They verify your income, run a full credit check, and order a valuation to confirm the property supports the new loan amount. Lenders also apply current serviceability buffers, which means your borrowing capacity might differ from when you first took out the loan, even if your income hasn't changed.

This process differs from a simple loan top-up, where your existing lender may approve a smaller increase without a full application. Refinancing involves switching lenders or restructuring your loan with your current lender, and that triggers a complete assessment. If your income has dropped, your expenses have increased, or lending criteria have tightened, you may not qualify for the full amount you're seeking.

How much equity can you actually access through refinancing

Most lenders cap your combined loan-to-value ratio at 80% without requiring lenders mortgage insurance. If your property is worth $700,000 and you owe $300,000, you can typically borrow up to $560,000, which gives you access to $260,000 in equity minus costs. Going above 80% is possible, but you'll pay LMI, which can add thousands to your upfront costs depending on the loan size and deposit gap.

Some lenders allow higher LVRs for specific purposes, such as building a second dwelling that generates rental income. In our experience, properties with existing granny flats or dual occupancy potential are valued more favourably, which can increase the amount of equity you can access. If you're planning a renovation that adds a separate dwelling, mention that to your broker early so they can approach lenders who recognise the added value.

Fixed rate periods ending often trigger refinancing decisions

Many borrowers refinance when their fixed rate period ends and they revert to a variable rate that's higher than what's currently available elsewhere. If your fixed term is ending soon, refinancing to access equity at the same time lets you secure a lower rate and fund your project in one application. Waiting until after you've reverted to the variable rate doesn't change the process, but you may end up paying a higher rate for several months while you organise the refinance.

If you're still within a fixed rate period, breaking the loan early to refinance usually incurs break costs. These costs depend on how much time remains on the fixed term and how much rates have moved since you locked in. In some cases, the savings from a lower rate and the value of accessing equity outweigh the break costs, but you'll need to run the numbers before proceeding.

Offset accounts and redraw facilities change when you refinance

Refinancing means leaving your current loan structure behind, including any offset account or redraw facility you've built up. If you have $30,000 sitting in an offset account, that balance won't transfer automatically to your new loan. You'll need to set up a new offset with your new lender, assuming the loan product includes one, and transfer the funds across yourself.

Redraw facilities work differently depending on the lender. Some allow you to redraw any extra repayments you've made, while others limit access once you refinance or restructure. If you've been making extra repayments and plan to use that buffer to cover renovation costs, check whether you can access those funds before you switch lenders. Once the refinance settles, any redraw entitlements with your old lender are lost unless you withdraw them beforehand.

Loan structure matters when you're funding a second dwelling

If you're refinancing to build a granny flat or second dwelling that you plan to rent out, splitting your loan between owner-occupier and investment portions can simplify your tax position. The portion funding the rental dwelling is treated as an investment loan, which means the interest is tax-deductible, while the portion funding your main residence remains owner-occupier. Setting this up correctly from the start avoids the need to refinance again later to separate the loans.

Split loan structures also give you the option to fix part of the loan and leave part variable, which helps manage interest rate risk while keeping some flexibility for extra repayments. If you're building in stages, a construction loan may be required for the granny flat portion, with funds released progressively as the build reaches certain milestones. Your broker can structure the refinance so the construction loan sits alongside your main mortgage without requiring separate applications.

Valuation outcomes affect how much you can borrow

Lenders order a valuation as part of the refinance application, and the outcome determines how much equity you can access. If the valuer's figure comes in lower than you expected, your borrowing capacity drops accordingly. Properties in regional areas, on large lots, or with unusual features are more likely to receive conservative valuations, which can limit the amount you can release.

In some cases, providing recent sales evidence for comparable properties or details of planned improvements can help the valuer reach a higher figure. If the valuation falls short, you may need to contribute additional cash, reduce the scope of your renovation, or consider a lender that offers desktop or automated valuations, which sometimes return higher figures than physical inspections. Not all lenders accept automated valuations for refinancing, so discuss this with your broker before applying.

Refinancing with an existing mortgage to fund construction

If you already have a mortgage and want to refinance to fund a granny flat build, lenders assess the application based on the combined loan amount and the projected value of the property once the second dwelling is complete. Some lenders require progress payments during construction, while others release the full construction amount upfront if you're using a fixed-price building contract. The latter simplifies the process but isn't available from all lenders, particularly for builds over a certain value.

For homeowners refinancing with an existing mortgage, the key consideration is whether your current lender will increase your loan or whether you need to switch to access the equity. Staying with your current lender can save on application fees and speed up the process, but switching often delivers a lower rate and access to features like offset accounts or flexible repayment options that your current loan doesn't include.

Call one of our team or book an appointment at a time that works for you

Refinancing to access equity involves more than comparing rates. The structure you choose, the lender's approach to valuation, and how the loan interacts with your tax position all affect the outcome. We work with homeowners across Australia who are funding renovations, granny flats, and second dwellings through refinancing, and we'll walk you through the options that suit your situation. Call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions