Sunlight Analysis

When is a sunlight analysis required in WA?

In Western Australia, R-Codes Volume 1 requires that new residential development does not unreasonably overshadow the solar collectors, solar access areas, or private open space of adjoining properties. A sunlight analysis demonstrating compliance with the sun access plane provisions is typically required for development applications in medium and high-density residential zones.

When is sunlight analysis required in NSW?

In NSW, the Apartment Design Guide (ADG) requires that a minimum of 70% of apartments receive at least 2 hours of direct sunlight between 9am and 3pm on 21 June (winter solstice). Sunlight analysis is required for all apartment DAs under SEPP 65 to demonstrate compliance with this requirement and to assess overshadowing of communal and public open spaces.

What is the ArchieLume tool?

ArchieLume is Ark Resources' proprietary sunlight analysis platform. It models shadow impacts and solar access with the precision and output format required by R-Codes (WA) and ADG/SEPP 65 (NSW). It produces shadow diagrams, sun access plane compliance reports, and solar access calculations that are accepted by planning authorities across WA and NSW, and that integrate directly with Ark Resources' ESD workflow.

Can sunlight analysis be done at early design stage?

Yes, and we strongly recommend it. Early-stage sunlight analysis allows the design team to test massing options and setback configurations before documentation is advanced. Identifying shadow impacts at concept stage allows design changes to be made cost-effectively, before construction drawings are complete.

Does Ark Resources provide sunlight analysis outside WA and NSW?

Our current sunlight analysis practice is focused on WA (R-Codes) and NSW (SEPP 65/ADG). For projects in other jurisdictions with specific solar access requirements, please contact us to discuss whether we can assist.