Can we rent out the granny flat after parents pass?

If it was consented as a DPU, no, it must be removed. If it was consented as a Secondary Dwelling from the start, yes, subject to separate metering + fire separation + council rental compliance. If you might want to rent later, choose Secondary Dwelling classification even though the permit takes longer.

How does VIC compare to SA on granny flat rules?

SA's 2023 secondary-dwelling rules are more permissive, broader rental rights, faster consent. VIC's DPU pathway is faster for dependent family but the Secondary Dwelling pathway is stricter than SA's. Confirm current rules on your council website before committing.

Does building a granny flat affect our home insurance?

Yes, you must notify your insurer within 30 days of building consent. Building insurance premium typically rises 8-15% to cover the additional dwelling. Content insurance for parents' items usually needs to be separate policy.

What if parents need aged care partway through?

Downsizing path is easiest to unwind, sell the smaller home. Granny flat is harder, most Melbourne buyers see it as an add rather than a subtract, so resale often needs conversion to a studio/home-office. Move-in extension is hardest, the extended home may need re-configuration or the family moves.

Decision Guide

Aging Parents in Melbourne: Move In, Granny Flat, or Downsize?

Three paths, one honest cost + care comparison

Aging parents need more support each year. Melbourne families face three practical paths: bring parents into the main home, build a granny flat / DPU, or help parents downsize to a smaller VIC home nearby. The right answer depends on care intensity, block size, and family dynamics.

Granny Flat / Dependent Person's Unit (DPU) on your block

Pros

Parents keep independence + own front door
Everyone under one address for daily support
$180k-$420k build cost, cheaper than downsizing gap in inner Melbourne
DPU pathway skips full planning permit in most VIC councils
Adds value + rentability once parents pass or move
Kids see grandparents naturally

Cons

Consumes rear yard, lose garden / play space
Block must be over ~500 m² to fit sensibly
8-14 month build to move-in
DPU classification restricts to dependent family only (cannot rent)
Some councils (Yarra, Stonnington, Bayside) restrict siting heavily

Best For

• Blocks over 500 m² without heritage overlay
• Parents who value independence + close family
• Care intensity: mild-moderate (mobility, meds, companionship)
• Families in outer + middle Melbourne with rear yard depth

Parents move into your main home (extension or existing room)

Pros

Highest care intensity possible, 24/7 access if needed
No secondary-dwelling planning process
Cheapest option if extension is not needed ($0-$15k modifications)
One power bill, one water bill, one house to maintain
Grandkids + grandparents share daily routine

Cons

Least independence for parents, psychological adjustment often difficult
Family dynamic strain over years
Extension cost $250k-$500k if adding space
Some councils require accessibility upgrades ($15k-$45k)
Everyone under one roof forever unless plan changes

Best For

• High care intensity (dementia, mobility >30% impaired, chronic conditions)
• Small blocks where granny flat cannot fit
• Families with strong existing multi-gen dynamic
• Parents already dependent on daily family support

Melbourne 2026 - three paths compared (5-year view)

Common Questions

DPU (Dependent Person's Unit) must be occupied by a dependent family member and removed when they leave, faster planning permit path, cannot be rented. Secondary Dwelling has no dependency requirement, can be rented, but planning permit is stricter + slower. For aging parents, DPU is almost always the right classification.

Sources

Last verified June 2026

Victorian Building Authority (VBA) + local councils (2026). Dependent-person units and secondary dwellings must meet permit, siting and services rules; check with your council. link
My Aged Care (Australian Government) (2026). Home-care and accommodation options to weigh against building to keep a parent close. link
Housing Industry Association (HIA) (2026). Cost and activity commentary for secondary dwellings and accessible/liveable design. link

Cost ranges are planning estimates cross-checked against the sources above, not quotes. Prices move with materials, labour, site conditions and council rules. Always confirm against a written, fixed-price quote for your own block.