Understanding the Impact of Street Trees on Solar Access
Shadow Diagrams was recently engaged by Heatherton Developments Pty Ltd to undertake a comprehensive Street Tree Shadow Study for a proposed residential development at 69–73 Duve Street, Marshall, Victoria. The purpose of the study was to assess the impact of proposed and existing street tree planting on solar access to future dwellings, private open space areas, pedestrian pathways and the broader development throughout the year.
As councils across Australia continue to prioritise urban greening initiatives, developers are increasingly required to demonstrate how street trees may affect solar access, amenity and the long-term performance of residential developments. A detailed tree shadow analysis provides planners, designers and decision-makers with the information needed to strike the right balance between landscaping outcomes and solar access requirements.
Our Approach
Using advanced 3D modelling and shadow simulation software, our team developed a detailed digital model of the proposed development and surrounding streetscape. Multiple tree species and canopy sizes were modelled to represent a range of mature growth conditions, allowing the client to understand the future shading effects of different landscape scenarios.
The assessment examined shadow patterns at key times throughout the year, including:
21 June (Winter Solstice)
21 September (Equinox)
21 December (Summer Solstice)
Shadow diagrams were prepared at 9:00am, 12:00pm and 3:00pm for each assessment date, providing a comprehensive understanding of seasonal and daily shading impacts.
Why Street Tree Shadow Studies Matter
Street trees provide significant environmental and community benefits, including improved streetscape character, urban cooling, biodiversity enhancement and reduced heat island effects. However, large canopy trees can also create overshadowing that affects:
Solar access to private open space
Daylight penetration into dwellings
Energy efficiency performance
Usability of outdoor recreational areas
Future landscaping opportunities
By understanding these impacts during the design phase, developers can make informed decisions regarding building orientation, landscaping strategies and tree species selection before construction begins.
Delivering Better Planning Outcomes
The completed study provided the client with a clear visual representation of how shadows move across the site throughout the year. The analysis enabled informed discussions with planners, designers and stakeholders regarding the relationship between proposed development outcomes and future street tree planting.
This project demonstrates how detailed shadow modelling can support better planning outcomes by balancing urban greening objectives with the need to maintain adequate solar access and residential amenity.
Need a Street Tree Shadow Study?
Shadow Diagrams has been providing professional shadow diagrams, solar access assessments and overshadowing studies across Australia since 2008. Our team works with architects, developers, planners, landscape architects, councils and property owners to provide accurate and council-ready shadow analysis for development applications, planning proposals and expert reports.
Whether you require a street tree shadow study, solar access assessment, overshadowing report or 3D shadow modelling, we can assist.
Contact ShadowDiagrams.net.au today to discuss your project.
