What Multi-Generational Living Actually Saves You

Most families weigh up multi-generational living as a lifestyle question. It is also a significant financial decision, and for many families, the numbers make a compelling case for building a home that holds everyone.

Around one in five Australians already live in a multi-generational household, and in the biggest cities the figure is closer to one in four. UNSW's City Futures research has tracked this shift for more than a decade, and the drivers are familiar: housing that keeps adult children closer for longer, an ageing population, and a growing number of families choosing this arrangement because it works for them Melbourne is at the forefront of this shift The ABS projects the city will record the fastest household growth of any Australian capital, between 47 and 52 per cent by 2046. More households, forming faster, in a city where land keeps getting scarcer and more expensive.

Most families arrive at multi-generational living through feeling rather than finance. A parent's health shifts. An adult child needs a secure base while they save. It is overwhelmingly an emotional decision, and rightly so. And yet, it’s also among the biggest financial decisions a household can make,and deserves to be reviewed as diligently as you would any other major life choice.

What the alternatives ask of you

If an ageing parent moves into residential aged care, the Basic Daily Fee alone is $66.80 a day as at March 2026. That’s a little over $24,000 a year and is indexed twice a year in line with the pension. That fee sits on top of accommodation, where a refundable accommodation deposit now averages above $570,000 nationally. The deposit is refundable in time, though it ties up more than half a million dollars of family capital for as long as care continues. In-home care through the government's Support at Home program is means-tested and usually lighter on out-of-pocket cost, with clinical care funded regardless of means.

Buying a second property to keep everyone close carries its own cost before anyone unpacks a box. On a median Melbourne house of around $950,000, stamp duty at general rates comes to close to $54,547. That is the entry fee paid to the state, ahead of the purchase price, a second mortgage, and a second set of rates and bills.

Why the build is a relative cost

Adding a second master suite to a home you are already building is one of the more cost-effective avenues you can take. It typically adds a modest share to the overall build, well short of a second mortgage or an aged-care placement, and the exact figure depends on the floorplan and the block. Carlisle's existing multi-generational designs show what that looks like in practice. Single-storey plan upgrades across the Clovelly, Amberley and Portland range bring a second master suite onto one level, while the Granada and Sorrento dual master suite designs do the same across two storeys. Each suite has its own ensuite and walk-in robe, so neither generation is scheduling a bathroom or borrowing a wardrobe.

The design thinking behind multi-generational harmony proves that happy multi-generational living starts with zoning: dedicated living areas that let each generation be independent. It favours flexible spaces that adapt as needs change, and dual master suites for comfort and dignity, like the ground-floor suite in the Astoria Grand that removes stairs for older relatives. Light-filled interiors, indoor-outdoor connection and multiple living spaces round it out.