A Room to Spare: How Renting Out Space Supports First‑Home Buyers

Meet the new generation of homeowners leveraging flat sharing to offset their mortgage payments.

By Bek Day

 
  • More first‑home buyers are offsetting rising living and mortgage costs by renting out spare rooms, creating a growing trend of homeowners turning to flat sharing for financial support.
  • Clear expectations, good communication and matching lifestyles are key to making shared living arrangements work smoothly for both homeowners and tenants.

With rising living costs squeezing homeowners, more first-time buyers are finding relief in an age-old solution: taking on a flatmate. For many, renting out a spare room helps ease financial pressures and keep their financial goals on track.

For Sydney couple Silvia Parra and Andres Mendoza who bought their first home in 2024, it’s been a smart move. “We were so excited to finally have a place of our own,” says Silvia. “But we didn’t anticipate how much the ongoing costs would add up.” When a friend mentioned she knew someone looking for a room, they decided to give it a go. “It just made sense,” says Andres. “We had the space and it seemed like a good way to pay all the bills coming in.” According to share accommodation platform Flatmates.com.au, the couple are part of a growing cohort of homeowners and landlords looking to subsidise costs this way.

How first-home buyers are finding smart ways to stay afloat

Silvia and Andres moved from Colombia in 2019 and saved steadily while renting in Sydney before taking advantage of the First Home Buyers Scheme to get a foothold in the market. “I heard about the scheme when they announced that permanent residents could access it,” says Silvia. “Then someone explained the process and the benefits we were eligible for, like not needing to pay stamp duty.” The couple’s two-bedroom Lane Cove apartment offered room to grow – but as interest rates rose and strata, insurance and maintenance costs piled up, they realised they’d need to think creatively to stay in their home.

What it’s really like to share your home with a flatmate

But what about privacy? As a young couple building their lives together, would a housemate impede their freedom? “Honestly, we felt like this was the best time in our lives to do this,” says Andres.

For Canberra-homeowner Melissa, having an extra person in a two- bedroom apartment made a huge difference with bills but came with trade-offs. “My boyfriend and I had to whisper-fight,” she laughs. “Or acknowledge that our dynamic was going to impact the single person living with us.” Still, the experience had unexpected upsides: “Seeing her dating adventures made us realise we were glad to be off the market.”

How to choose the right flatmate and set expectations early

Start by getting clear on why you’re opening your home. Is it purely financial or are you also looking for company? Knowing this helps shape what you’re seeking in a tenant. When advertising your room, be upfront about your lifestyle. For example, if you work from home, prefer quiet evenings or expect shared cleaning duties. Ask potential flatmates about their daily routines, work hours and social habits, too.

For Sydney-based Emily, sharing a home had both highs and lows. “My now-husband and I moved in with his best friend to cut costs and while we had some great times, I was often the third wheel,” she says. “The final straw came when I realised our flatmate was using the living room as his floordrobe.” Her advice? “Make sure both your partner and your flatmate are house-trained.” And do your due diligence: you’re within your rights to ask for references from landlords and former housemates. You can even trial an initial three or six-month lease before committing to something longer term.

Avoiding conflict: tips for shared homes

Money, mess and privacy are the three biggest tension points in shared homes so it pays to set things up clearly from the start. Be clear about expenses – a shared tracker or direct debit keeps bills fair and simple – and agree early on how you’ll divide cleaning duties and communal costs.

Establish boundaries that protect everyone’s downtime, like designating quiet nights or having the living room to yourself once a week. And if things aren’t working, don’t just ignore it: a respectful chat can fix friction but if it can’t, follow the notice terms in your agreement to part ways smoothly.

Why flat sharing works for some homeowners

For Silvia and Andres, having a flatmate has been a good experience, offering a way for them to get ahead financially while still enjoying the company of others. “It’s helped us feel more secure,” says Silvia. “And we’ve learnt that when you pick the right person, sharing your house can make it feel even more like home.”

Government schemes and lending options that make buying easier

There are a few ways to make first-home buying more affordable.

First Home Owners grants

  • Eligible buyers can save thousands by avoiding stamp duty on properties below certain price thresholds, helping fast-track that first purchase.

Australian Government 5% Deposit Scheme

  • This initiative lets eligible first-home buyers purchase with as little as a five per cent deposit – without paying lenders’ mortgage insurance.

Borrowing more with a tenant

  • CommBank is the only lender that allows eligible buyers to include up to $150 per week from a flatmate in their loan assessment, to increase borrowing power.

 

Visit CommBank’s Government Grants and Schemes to learn more.

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Published: 23 January 2026

Things you should know

An earlier version of this article was published in Brighter magazine.

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