Does the development need to protect neighbours’ sunlight?
Yes. A dual-occupancy development needs to be designed so that it does not cause excessive overshadowing of neighbouring residential properties. In particular, we would check the proposal against the current solar access and building envelope requirements, including the effect of the proposed building's height, setbacks and building envelope on adjoining properties.
A new dual occupancy should not unnecessarily block sunlight to neighbouring homes.
The size, height and location of the new buildings can affect how much shadow falls onto the property next door. We would therefore check the proposed development's shadows to make sure the neighbour continues to receive the required level of sunlight.
This is normally demonstrated using shadow diagrams, particularly for the relevant winter assessment period when shadows are longest.
Reference: Planning (Residential Zones) Technical Specifications 2026 (NI2026-303), Assessment Outcome 15: Solar Access - Planning (Residential Zones) Technical Specifications 2026
Link on the answer: https://www.legislation.act.gov.au/View/ni/2026-303/current/PDF/2026-303.PDF
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| Dual Occupancy Q&A | #464 | agrees | 20/08/2026 |