Granny Flat vs Home Extension
Granny flat: creates separate independent dwelling (60 sqm), generates rental income ($380–$480/week). Extension: adds space to existing house, no independent rental income but bigger family home.
Cost Comparison
Granny flat (60 sqm, detached): all-in $150,000–$210,000 Ground floor extension (60 sqm): all-in $170,000–$215,000 (construction + structural mods + finishes)
Costs are similar — but the granny flat generates $380–$480/week in rent while the extension generates no income.
Decision
Granny flat: existing house is adequate, want rental income, want elderly parent accommodation with privacy. Extension: existing house is too small, need more bedrooms/living space, want one integrated home.
Some families do both — extend AND add a granny flat. Contact Buildana for a free assessment.
