Can both dwellings share a driveway?
Yes. Both a secondary residence (granny flat) and a dual occupancy can generally share the same driveway in the ACT. You do not necessarily need to provide a separate driveway for each dwelling, as long as the shared driveway provides suitable access and the required parking is provided.
Reference: Planning (Missing Middle Housing) Design Guide 2026,
Short Answer
Yes. Both a secondary residence (granny flat) and a dual occupancy can generally share the same driveway in the ACT, provided suitable access and parking are provided.
Detailed Explanation
For a secondary residence, the principal dwelling and secondary residence are located on the same block and are not separately subdivided. A shared driveway may therefore provide vehicle access to both dwellings, subject to compliance with the applicable ACT Territory Plan requirements for vehicle access and parking.
For a dual occupancy, a shared driveway is also permitted. ACT Government planning guidance recognises that a driveway may be used by both dwellings and, in a unit-title arrangement, may be retained as common property for the benefit of both units.
In both cases, whether a particular shared-driveway design is acceptable will depend on compliance with the applicable ACT Territory Plan, Residential Zones Policy, parking, access and other relevant development requirements.
No minimum block size does not remove the need for planning assessment.
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