One home. Two keys. A FIFO base in the Perth market.
A dual-key home is one house that locks into two living spaces. Each side has its own entry and its own living area. One side is yours. The other can be rented. It is still one title and one home from the street — not two houses on two lots.
For a FIFO worker that split matters. You can own a place in Perth, keep a lockable side for your life, and let the other side earn rent while you are on site.
Why FIFO workers look at dual-key
A normal whole-house rental means inspections through your rooms, tenants using your garage, and a clean-up the day you fly in. A dual-key keeps the tenant on their side of the lock.
You still get exposure to the Perth property market. You still add a place someone can actually live. You also have a home to come back to on R&R.
New-build tax settings can still apply to the rented side if that part qualifies as a new residential investment. The side you live in is treated differently. An accountant should split the numbers. Do not treat the whole house as a pure investment.
Case study: Sara
Sara works a 2 weeks on / 1 week R&R roster. She wants three things at once: a stake in the Perth market, a place that is actually home, and somewhere her car and road bike stay locked up while she is on site. She does not want to rush a whole-house clean for a rent inspection the week she gets back.
She builds a new 4-bedroom, 3-bathroom dual-key house-and-land package in the seaside suburb of Madora Bay, a stone’s throw from Singleton Beach. The two sides have separate living areas and separate entries.
| Item | Amount |
|---|---|
| Land | $402,000 |
| Home build (4 bed, 3 bath, dual-key) | $469,000 |
| Total | $871,000 |
| Deposit (20%) | $174,200 |
| Loan | $696,800 |
| Rate | 6.14% principal and interest, 30 years |
| Repayment | $4,241 a month ($979 a week) |
| Rent — tenant side only | $560 a week ($29,120 a year) |
The lock-up garage sits on Sara’s key. Car and road bike stay on her side. The tenant side has its own living area and its own entry.
She intends to rent that side to her friend Raj. That gives her extra peace of mind that the house is looked after while she is away. It is still a real tenancy: a written lease, rent, and a clear line between Raj’s rooms and hers.
Rent versus mortgage only
Other costs (rates, insurance, management) are left out.
| Item | Weekly | Annual |
|---|---|---|
| P&I repayment on $696,800 at 6.14% | $979 | $50,887 |
| Rent received (Raj’s side) | $560 | $29,120 |
| Shortfall | $419 | $21,767 |
On rent versus the full home loan, the tenant side does not cover the whole repayment. Sara puts in about $419 a week. That is the cash cost of a larger 4×3 dual-key home — her own lockable living area, garage and beach-side base — not only an investment unit.
Because she lives in one side, only the rented portion is an investment for tax. Interest, rates and depreciation need to be apportioned. The rented side of a qualifying new build can still sit inside negative gearing and the new-build CGT rules. Her side is closer to a home she uses. Raj being a friend does not change that.
After five years
P&I pays the loan down. After five years the balance is about $650,000.
| Growth assumption | Value after 5 years | Equity (value − remaining loan) | Gain on $871,000 |
|---|---|---|---|
| 8% per year | $1,280,000 | $630,000 | $409,000 |
| 13% per year | $1,605,000 | $955,000 | $734,000 |
Figures rounded.
If the Madora Bay home grew at a steady 8% a year, it would be worth about $1.28 million, with equity around $630,000. If it matched a strong recent five-year run of 13% a year, it would be worth about $1.60 million, with equity around $955,000. Those rates are scenarios, not a forecast. Costs and tax on a sale would change cash in the hand.
The point for Sara is the mix: two weeks on site, one week at home near Singleton Beach, bike and car locked on her key, Raj in the other side, and a new home that still sits in the Perth market.
What you need to know
Not every estate or R-Code allows a dual-key layout.
General information only. Not tax, legal or financial advice. Growth figures are illustrations, not predictions. Owner-occupied and rented parts of a dual-key home are treated differently for tax.