The right way to upgrade your family home

Practical steps to financing a bigger home in Georgetown without overstretching your budget or settling for the wrong loan structure.

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When upgrading makes sense financially

You can usually afford to upgrade when your current property has built enough equity to cover a deposit on a larger home without requiring Lenders Mortgage Insurance on the new purchase. In Georgetown, where median house prices sit around $450,000 to $550,000 depending on the street and condition, many families find themselves with $150,000 to $200,000 in equity after five to seven years of ownership. That equity becomes your deposit, but whether you should use all of it depends on what happens to your loan amount and your repayments.

Consider a family who bought in Georgetown for $420,000 several years back. Their home is now worth $530,000, and they owe $310,000. That gives them $220,000 in equity. They want to move to a four-bedroom home closer to Georgetown Public School, which will cost them $620,000. If they use $140,000 as a deposit and keep $80,000 in reserve for costs and buffer, their new loan amount becomes $480,000. Their monthly repayment jumps from around $2,100 to $3,200 at current variable rates. That increase matters more than the total loan size when you're deciding if the upgrade fits your income.

The loan to value ratio (LVR) on that new purchase would be around 77%, which avoids LMI and keeps the interest rate competitive. But the real question is whether the household income can absorb the extra $1,100 per month without cutting into savings or lifestyle too deeply. If both partners work and their combined income has increased since the first purchase, the numbers often work. If one partner has dropped to part-time or the household has added childcare costs, the upgrade might need to wait.

How to structure your owner occupied home loan for flexibility

A split loan gives you both stability and room to move if your circumstances change. You fix a portion of your borrowing to lock in repayments you can budget around, and you keep the rest on a variable rate so you can make extra repayments or redraw if needed. For someone upgrading in Georgetown, splitting 60% fixed and 40% variable often makes sense because you protect most of your repayment from rate rises while keeping access to an offset account on the variable portion.

An offset account linked to the variable portion of your loan reduces the interest you pay without locking your money away. If you keep $30,000 in an offset, you only pay interest on the remaining balance. That saves you real money each month, and you can access the funds if the hot water system fails or the car needs replacing. A fixed interest rate home loan on the other portion means you know exactly what that part of your repayment will be for the next two to four years, which helps when you're adjusting to a higher mortgage.

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Some lenders also offer portable loan features, which let you transfer your existing loan to a new property without breaking your fixed rate or paying discharge fees. If you're upgrading and your current loan has a fixed rate that still has 18 months to run, porting that loan can save you thousands in break costs. Not every lender allows this, and not every fixed rate is portable, so it's worth checking before you commit to selling.

Timing the sale and purchase to avoid double mortgages

You avoid paying two mortgages at once by settling your sale before or on the same day as your purchase. In Georgetown, where the market moves steadily rather than in sharp bursts, you can usually negotiate a settlement period that lines up with your new property. Most buyers will accept a 60-day settlement if you explain you're upgrading, and most sellers will work with a 60 to 90-day timeframe if the offer is solid.

If you can't line up the settlements exactly, bridging finance covers the gap. You borrow against the equity in your current home to fund the deposit and purchase of the new one, then repay the bridging loan when your sale settles. Bridging finance costs more than a standard home loan because the interest rate is higher and you're paying interest on both loans for a short period, but it lets you secure the new property without losing the sale. In our experience, families upgrading in Georgetown use bridging for four to eight weeks on average, which adds a few thousand dollars in interest but removes the risk of missing out on the home they want.

Another option is to negotiate a longer settlement on your purchase and a shorter one on your sale, so the sale funds the purchase without overlap. This works if the seller of your new home isn't in a rush, which is often the case when you're buying from someone downsizing or relocating for work. Georgetown has a reasonable number of older couples selling larger homes to move closer to family or into retirement villages, and they're often more flexible on timing than younger buyers.

How lenders calculate your borrowing capacity for the upgrade

Lenders calculate what you can borrow based on your income, your existing debts, and your living expenses. When you're upgrading, they assess your capacity as if you've already sold your current home, so your existing mortgage doesn't count against you. What does count is any other debt like car loans, personal loans, or credit card limits. Even if you don't carry a balance on your credit card, the lender assumes you could draw down the full limit, which reduces how much they'll lend you.

If you're earning $120,000 combined and you have a $15,000 car loan and a $10,000 credit card limit, the lender will factor in repayments on those before working out your borrowing capacity. Paying off the car loan or closing the credit card before you apply for a home loan can increase what you're approved for by $50,000 or more. That difference might be the gap between the home you want and the one you settle for.

Lenders also apply a buffer to your interest rate when they assess your application. They test whether you could still afford the repayments if rates increased by 3%. At current variable rates, that means they're checking if you can service a rate above 9%, even though you'll be paying closer to 6%. If your income comfortably covers the repayments at the buffered rate, you'll get approved. If it's tight, the lender will either reduce your loan amount or decline the application.

Using equity without selling: when it works and when it doesn't

You can access equity in your current home without selling by refinancing and increasing your loan amount, then using that cash to buy an investment property or a second home. For families in Georgetown, this approach sometimes makes sense if you want to keep your current home as a rental and move into something larger. Your existing property generates rent that offsets the mortgage, and you take out a separate owner occupied home loan for the new place.

The problem is that you're now carrying two mortgages, and rental income doesn't always cover the full cost of the first loan. Georgetown rental yields sit around 4% to 5%, which means a property worth $530,000 might bring in $450 to $500 per week. After rates, insurance, and maintenance, you're often covering a shortfall of $200 to $300 per week out of your own income. Lenders will assess your capacity to service both loans plus that shortfall, which limits how much they'll lend you for the upgrade.

This structure works if your income has increased significantly since you bought your first home, or if your partner has returned to full-time work. It doesn't work if you're already stretched or if your job security has changed. The other risk is vacancy. If your Georgetown rental sits empty for six weeks between tenants, you're covering the full mortgage on that property plus your new home loan. That's a cash flow problem that can derail your budget quickly.

Call one of our team or book an appointment at a time that works for you. We'll look at your equity, your income, and the home you're aiming for, and we'll tell you what loan structure fits your situation without overselling or complicating it.

Frequently Asked Questions

How much equity do I need to upgrade my home in Georgetown?

You typically need enough equity to cover a 20% deposit on your new property to avoid Lenders Mortgage Insurance. For a $620,000 home in Georgetown, that's around $124,000, plus another $20,000 to $30,000 for stamp duty and costs.

Should I fix or stay variable when upgrading to a larger mortgage?

A split loan structure often works well when upgrading because you fix a portion for budget certainty and keep the rest variable with an offset account. This gives you protection from rate rises while maintaining flexibility to make extra repayments or access funds if needed.

How do I avoid paying two mortgages when upgrading?

You avoid double mortgages by aligning your sale and purchase settlements to happen on the same day or within a few days of each other. If timing doesn't work out, bridging finance covers the gap between settlements, usually for four to eight weeks.

Does my current mortgage affect how much I can borrow for the upgrade?

No, lenders assess your borrowing capacity as if you've already sold your current home, so your existing mortgage doesn't count against you. However, other debts like car loans and credit card limits will reduce what you can borrow.

Can I keep my current home as an investment when I upgrade?

You can keep your current Georgetown home as a rental and buy a new property, but you'll need enough income to service both mortgages plus any rental shortfall. Lenders assess your capacity to cover both loans, which often limits how much you can borrow for the upgrade.


Ready to get started?

Book a chat with a Mortgage Broker at Mortgage By Design today.