Can I build a dual occupancy on a block smaller than 600 m²?
Yes, potentially. There is no general 600 m² minimum block-size requirement for dual occupancy. However, the Missing Middle Housing Design Guide identifies blocks over 600 m² as typically suited to dual occupancy, so development on a smaller block will depend on whether an appropriate compliant design can be achieved.
Yes, potentially. A dual occupancy may be possible on a block smaller than 600 m², as the current planning framework does not set 600 m² as a general minimum block size for dual occupancy.
However, the ACT Missing Middle Housing Design Guide identifies blocks greater than 600 m² as typically suited to dual occupancy. Therefore, while a smaller block is not necessarily excluded, it may be more challenging to achieve an appropriate design that meets all applicable planning requirements.
Reference: Planning (Missing Middle Housing) Design Guide 2026 - ACT Missing Middle Housing Design Guide
Link on the answer: https://www.planning.act.gov.au/__data/assets/pdf_file/0020/3092411/ACT-Missing-Middle-Housing-Design-Guide.pdf
Where this question is kept
| Dual Occupancy Q&A | #357 | agrees | 11/08/2026 |