Is a granny flat considered a permanent dwelling?
Written by Clayton Bielby
Updated at March 31st, 2025
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Answer:
Yes — when built to Class 1a certification standards under the National Construction Code (NCC), a granny flat is classified as a permanent residential dwelling.
Expandify homes are:
- Fully certified Class 1a dwellings
- Installed on permanent foundations
- Approved for full-time occupancy
- Treated by councils as permanent buildings (not mobile homes or temporary structures)
This makes them suitable for long-term use, resale, and council-compliant residential living.