Guarantor loans explainer: How Western Sydney families are bridging the deposit gap

Key takeaways:

• Rising property prices in Western Sydney’s growth corridor are making it harder for first home buyers to save a traditional 20% deposit.
• Guarantor home loans allow families to use their home equity to reduce deposit requirements while potentially avoiding Lenders Mortgage Insurance (LMI).
• In suburbs like Narellan, having the right finance strategy can help buyers secure a property before further price increases impact affordability.

For many first home buyers across South-West Sydney, the challenge is no longer just getting approved for a home loan. It’s saving a deposit quickly enough to meet rising prices.

For example, Narellan’s median house price is around $1,050,000, with values rising 5.0% annually, according to PropTrack. Nearby Oran Park is approaching $1.2 million, highlighting the pace of growth across the region.

To avoid lenders' mortgage insurance (LMI) under a traditional loan structure, buyers would need a 20% deposit – around $210,000 on a $1.05 million purchase. For many first home buyers in the Macarthur region, that figure may be difficult to reach without support from the Bank of Mum and Dad Western Sydney.

That’s why more parents are stepping in to bridge the deposit gap and help their children enter the property market sooner. If you’re in that position, our guarantor loans explainer guide outlines how parents can use the equity in their own home to help their first home buyer children meet deposit requirements. 

How guarantor loans work in South-West Sydney

When considering a guarantor home loan in Western Sydney, it’s important to understand that this isn’t about giving a cash contribution; it’s about leveraging equity.

Equity vs cash

Many parents may not have $200,000 in available cash to contribute toward a Narellan house deposit. But they may hold significant equity in their home, particularly in established suburbs such as Mount Annan, Smeaton Grange or surrounding areas.

So, rather than providing a cash contribution upfront, a parent acting as guarantor offers a portion of their own home’s equity as security for the loan. 

Understanding the 20% structure

In a typical loan arrangement, parents can provide what is known as a limited guarantee. This is usually secured against a portion of the property and may cover the equivalent of a 15–20% deposit.

This means that you – the buyer – may be assessed by the lender as though you are borrowing at or below an 80% loan-to-value ratio (LVR), even though you haven't contributed a full 20% deposit yourself. 

Because this loan structure reduces risk for lenders, it could result in a more competitive interest rate and not having to pay LMI, depending on the lender and your overall borrower profile.

Guarantor Loan vs. Australian Government 5% Deposit Scheme

If you’re buying your first Narellan home in 2026, another way to overcome the deposit hurdle is by applying to the Australian Government 5% Deposit Scheme. This scheme allows eligible first home buyers to purchase a property with as little as a 5% deposit without paying LMI, as the government guarantees a portion of the loan.

Each option has benefits and disadvantages. Here’s a quick comparison of the differences between a guarantor loan and the 5% deposit scheme. 

• Deposit required: With a guarantor home loan, you may not need a cash deposit at all if your family can provide enough equity as security. Under the 5% deposit scheme, you will need a minimum 5% deposit ready to go.
• LMI: You can typically avoid lenders mortgage insurance (lenders mortgage insurance (LMI)) if a guarantor loan is structured correctly, while the government waives this fee for those using the 5% deposit scheme.
• Property price cap (Sydney): There is no formal price cap for guarantor loans, though it is subject to lender assessment. The 5% deposit scheme has a $1.5 million cap for properties in Sydney.
• Borrowing capacity: Your borrowing capacity may be higher with a guarantor because of the lower loan to value ratio (LVR) structure, whereas the 5% scheme might be more limited due to the higher LVR (95%).
• Repayments: Avoiding high LVR lending with a guarantor could mean your repayments are potentially lower, while the larger loan size often associated with the 5% deposit scheme can result in higher repayments.
• Eligibility: To use a guarantor loan, you need a suitable guarantor, which is usually a parent. For the 5% deposit scheme, you must meet specific government eligibility criteria.
• Flexibility: Guarantor loans offer more flexibility and can be used for a wide range of properties, including higher-value homes, whereas the 5% scheme is limited by scheme rules and availability.

Exit strategy: For guarantor loans, your guarantor may be released from the loan once your LVR reduces to 80% or below, a step that isn't applicable to the 5% deposit scheme.

Why 2026 may be the right time to leverage a guarantor loan

Timing plays a critical role when entering a market that is being shaped by major infrastructure and population growth. For first home buyers in South-West Sydney, 2026 may present a narrow window of opportunity.

The Aerotropolis effect

With the Western Sydney International Airport expected to open in 2026, attention is turning to the broader Western Sydney Aerotropolis property growth corridor.

Suburbs such as Leppington and Bringelly are already responding. Leppington’s median house price has reached $1,120,000, rising 3.2% annually in the 12 months to February 2026. Bringelly, a rural-residential suburb at the heart of the Aerotropolis precinct, is also experiencing a surge in buyer and investor interest.

Why speed to market matters

This increased activity may continue to place upward pressure on prices across South-West Sydney, including established areas like Narellan and Oran Park.

In a rising market, timing can significantly impact affordability. This is where a guarantor home loan can offer a meaningful advantage. Rather than spending several more years saving for a full deposit, it could help you secure a home before further infrastructure-led growth impacts affordability.

Understanding the risks to parents

While guarantor loans can help children enter the market sooner, it's important for parents to be clear on the risks involved.

Limited versus full guarantees

In most cases, guarantor home loans in Western Sydney are structured as limited guarantees. Rather than being liable for the entire loan amount, your exposure as a parent is capped at a specific portion, often equivalent to a 15–20% deposit. For example, on a $1 million purchase, the guarantee may be limited to around $150,000 to $200,000. 

A full guarantee, by contrast, would make you liable for the entire loan. Because full guarantees carry a higher level of risk, most brokers and lenders recommend a limited structure where appropriate.

It is also worth noting that, as a guarantor, your own borrowing capacity may be impacted for the duration of the guarantee. If you're planning to refinance, access equity or take out new finance, this is worth discussing with your broker before you commit.

Independent legal advice is also recommended, and most lenders require it before finalising a guarantee. This is to ensure that both parents and children fully understand their obligations before entering into the agreement.

Exiting a guarantor loan

While acting as a guarantor is a significant commitment, it is not necessarily for the full life of the loan.

In most cases, once the loan reaches an 80% loan-to-value ratio or lower, the guarantor may be released. In a market like Narellan that’s growing at around 5% per year, this milestone could be achievable sooner than many families expect, possibly within three to five years.

However, timeframes vary and are influenced by a combination of factors such as property value, loan repayments and broader market conditions.

Narellan guarantor loan parent’s checklist: what to consider

• Equity position: Do you have sufficient equity in your home to support the guarantee without overextending your own finances?
• Age and future plans: Will acting as a guarantor affect your retirement plans, home downsizing goals or future borrowing capacity?
• Risk exposure: Do you understand the portion of loan you are liable for and how a limited versus full guarantee works?
• Exit strategy: Is there a clear timeframe for when you may be able to be released from the guarantee, subject to lender approval?
• Legal advice: Have you obtained independent legal advice from a qualified professional, such as a property lawyer, to fully understand your obligations?

Work with a Loan Market broker in Narellan  

Buying a first home in Narellan is becoming increasingly challenging. The $1.5 million Sydney price cap under the 5% deposit scheme helps buyers enter the market with a lower deposit. However, competition for family homes across South-West Sydney’s growth corridor is increasing and driving up prices, moving the goal posts for aspiring homeowners. 

Having the right finance structure can be the difference between securing a property or missing out altogether. A Loan Market broker in Narellan can help you understand the benefits of a guarantor loan, assess your family’s equity position and structure a solution that considers both your needs and your parents’ circumstances.

Securing a property in Narellan or Oran Park requires a decisive finance strategy. Contact the team at Loan Market Narellan to facilitate a family discussion and see if a guarantor loan is the right shortcut to your first home in 2026.

FAQs

Can I buy a home in Narellan without a 20% deposit?

Yes. Options such as a guarantor loan or the Australian Government 5% Deposit Scheme may allow you to purchase with a smaller deposit. Each option has different eligibility criteria and risks, so it is important to discuss this with a mortgage broker to understand which approach fits your situation best.

What is a guarantor home loan and how does it work?

A guarantor home loan allows a parent or close family member to use the equity in their property as security for part of your loan. This may reduce or remove the need for a cash deposit and can help you avoid Lenders Mortgage Insurance, depending on the lender and your circumstances.

What are the risks for parents when acting as a guarantor?

Parents are liable for a portion of the loan under a limited guarantee, often covering around 15–20% of the purchase price. Under a full guarantee, they are liable for the entire loan. If repayments are not met, the lender may call on that guarantee, which can have negative financial implications. Getting independent legal advice is strongly recommended.

Should I buy a home in Western Sydney in 2026?

Western Sydney is currently a high-growth infrastructure corridor, with demand increasing in suburbs such as Narellan and Oran Park. In this environment, entering the market sooner may help you secure a property before further price growth impacts affordability. For some buyers, this may be achievable with support from family through a guarantor loan.