Signal
Tasmania is increasing the allowable size of secondary dwellings from 60m² to 90m².
Why it matters
On paper, that can look like a modest planning adjustment.
In practice, it may be something more consequential.
At 90m², this is no longer just a “granny flat” in any meaningful housing sense. It starts to approach the scale of a genuine small dwelling — one capable, at least physically, of supporting couples, downsizers, independent adult children, and in some cases even small family households.
That makes the key issue less about floor area alone, and more about what the planning system will allow that built form to become.
System angle
The real question is no longer simply what can be built.
It is who is allowed to live there.
If the occupancy rules remain narrow, the reform may remain largely symbolic. But if broader household use or independent occupation is allowed, the change starts to behave very differently.
It stops being a small concession to backyard accommodation and starts to look like a quiet pathway to distributed infill density.