If you are lodging a Development Application (DA) or applying for a Complying Development Certificate (CDC) in Sydney, accurate shadow diagrams are an essential part of your submission. Shadow diagrams are used to assess solar access impacts on neighbouring properties, including private open spaces, balconies, and habitable rooms, ensuring your project complies with the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 (NSW) and local Sydney Development Control Plans (DCPs).
Shadow diagrams for Sydney residential developments must show shadows at 9 am, 12 pm, and 3 pm on 21 June (winter solstice), the standard reference for solar access compliance. They should be drawn at an appropriate scale (typically 1:100 or 1:200) and include adjacent buildings, fences, trees, and landscaping to reflect the true impact of your development. Both 2D plans and 3D models are acceptable, with 3D modelling recommended for larger projects to clearly demonstrate overshadowing.
For Complying Development in Sydney, certification can be issued by private certifiers instead of council. This allows faster approval while ensuring compliance with state regulations.
Submitting accurate shadow diagrams with your DA or CDC application helps avoid delays, demonstrates compliance with solar access requirements, and supports approvals from Sydney councils or private certifiers. Whether you are building a new house, dual occupancy, townhouse, or multi-unit development, professional shadow diagrams are a critical part of your application package.