How to Buy a Duplex as Your First Home in Sunbury

A duplex can work well for first home buyers who want to live in one side and rent out the other.

Purchasing a duplex in Sunbury means you're buying either both titles or a single title that's part of a dual occupancy property, and which one you're getting changes everything from how you finance the purchase to what you qualify for under government schemes.

Can You Use First Home Buyer Concessions on a Duplex Purchase?

You can use first home buyer stamp duty concessions and government schemes on a duplex, but only if you intend to live in the property as your primary residence. If you're buying both sides of a duplex on separate titles and plan to rent out the second dwelling immediately, the side you don't occupy won't qualify for first home buyer benefits. The property value limits also apply, which in Victoria means the purchase price must be under $1,000,000 for the First Home Owner Grant on new builds, and under $600,000 for stamp duty relief.

Consider a buyer purchasing a newly built duplex in Sunbury for $580,000. If they're living in one side as their primary residence and it's a new build, they would qualify for the $10,000 First Home Owner Grant and full stamp duty exemption. If the same duplex was an established property at $550,000, they'd receive stamp duty concessions but not the grant, as that only applies to new or substantially renovated homes.

What Deposit Do You Need for a Duplex as a First Home Buyer?

The deposit required depends on whether you're occupying the property yourself or treating part of it as an investment. For an owner-occupied duplex where you live in one dwelling, you can access low deposit options including the Regional First Home Buyer Guarantee, which covers properties in Sunbury and allows you to purchase with a 5% deposit without paying Lenders Mortgage Insurance.

If you're buying both sides on separate titles and renting one out immediately, lenders treat the second dwelling as an investment property. That typically requires a 10% deposit at minimum, and you'll need to demonstrate that rental income in your application. In our experience, buyers who plan to rent out the second side often need to save the larger deposit or have family contribute through a gift or guarantor arrangement.

Sunbury's median house price sits around $600,000 to $650,000, which means a duplex in the area often falls within the price range where these schemes apply. A 5% deposit on a $590,000 duplex would be $29,500, compared to $59,000 for a 10% deposit.

How Lenders View Rental Income from the Second Dwelling

Lenders will factor in rental income from the second dwelling when assessing your borrowing capacity, but they won't use the full amount. Most lenders apply a discount of 20% to account for vacancy periods and maintenance costs, so if the second dwelling could rent for $400 per week, they'll only use $320 per week in their calculations.

This rental income can help you service a larger loan, but it won't replace your primary income. You still need to demonstrate that your employment income can cover the full loan repayment if the rental side becomes vacant. For buyers in Sunbury working locally or commuting to Melbourne's northern suburbs, lenders will want to see stable employment history and regular income over at least three to six months.

As an example, a buyer earning $85,000 per year might qualify for a loan of around $450,000 on their income alone. With verified rental income of $320 per week from the second dwelling, their borrowing capacity could increase to around $500,000, depending on other debts and living expenses.

Does the Home Guarantee Scheme Cover Both Sides of a Duplex?

The Home Guarantee Scheme only covers the portion of the property you occupy as your primary residence. If you're buying a duplex on a single title and living in it, the entire property can be covered under the scheme. If you're purchasing both sides on separate titles, only the title you live in qualifies, and the second dwelling would need to be financed as an investment property with standard lending terms.

The Regional First Home Buyer Guarantee applies to Sunbury because it's classified as a regional area under the scheme, which gives buyers here an advantage over those purchasing in metropolitan Melbourne. This scheme has a capped number of places each financial year, so getting pre-approval early in the year improves your chances of securing a spot.

Fixed or Variable Interest Rates for a Duplex Purchase

Choosing between a fixed interest rate and a variable interest rate depends on whether you want repayment certainty or flexibility. A fixed rate locks in your repayments for a set period, usually one to five years, which helps with budgeting when you're also managing rental income from the second dwelling. A variable rate typically offers features like an offset account or redraw facility, which can reduce the interest you pay over time if you deposit your rental income into the offset.

Many buyers choose a split loan, fixing a portion of the loan for stability and keeping the rest variable for flexibility. If you're receiving $1,600 per month in rent from the second dwelling, depositing that into an offset account linked to the variable portion reduces the balance on which interest is calculated. Over time, this can save you thousands in interest without requiring you to make extra repayments that lock funds away.

What Happens If You Want to Sell One Side Later?

If you purchased the duplex on two separate titles, you can sell one side independently without affecting the other. This gives you options down the track if your circumstances change or if you want to access equity. If the duplex is on a single title, you'd need to sell the entire property or go through a subdivision process to create separate titles, which involves council approval, surveying, and legal costs.

Buyers in Sunbury choosing between a single title duplex and separate titles should consider their long-term plans. Separate titles offer more flexibility but may cost slightly more upfront due to additional conveyancing and registration fees. A single title is simpler at purchase but limits your options if you later want to sell or refinance just one dwelling.

How Do You Apply for a Home Loan on a Duplex?

Your first home loan application for a duplex follows the same process as any residential property purchase, but you'll need to be clear with the lender about your intentions. Let them know from the start whether you're occupying the entire property, living in one side and renting the other, or purchasing as an investment. That determines which loan products you're eligible for and what documentation they'll require.

You'll need to provide proof of income, recent payslips, bank statements showing your savings history, and details of any debts including credit cards, car loans, or buy-now-pay-later accounts. If you're relying on rental income from the second dwelling, the lender will want to see a rental appraisal or existing lease agreement. Getting these documents together before you start looking at properties speeds up the approval process once you find the right duplex.

Call one of our team or book an appointment at a time that works for you. We'll walk through your situation, look at what you're eligible for under the current schemes, and structure your application to give you the outcome you're after without overcomplicating the process.

Frequently Asked Questions