When is a shadow diagram required?

Short answer

A shadow diagram is required when submitting a Development Application (DA) for projects that could impact neighbouring sunlight or solar access.

Full answer

Most councils require shadow diagrams for developments above a single storey or where overshadowing of adjoining properties may occur. They are typically mandatory for townhouses, apartments, mixed-use buildings and significant extensions. Councils also request them to assess compliance with solar access controls and to protect communal open space.

Why this matters

Submitting a DA without a shadow diagram can cause rejection or delays. Providing one upfront shows compliance and helps smooth approval.

How Certified Energy can help

We create precise diagrams that meet council formatting and timing requirements, ensuring your DA has the best chance of success.

Related regulations

• Local Council DCPs on solar access and overshadowing

• NSW Planning and Environment guidelines

• Apartment Design Guide (ADG) solar access provisions

Helpful resources 

• What is a shadow diagram?
• How much do shadow diagrams cost?
• What should be included in a shadow diagram?
• How do shadow diagrams affect DA approvals?