Demonstrating the benefits of increasing available green infrastructure in residential homes (GC21000)

What was it all about?

This project demonstrated the social, economic and environmental benefits of increasing green infrastructure in new residential homes. The research showed clear demand for greener private outdoor spaces, confirmed strong market value linked to green infrastructure, and provided practical evidence on cooling, safety and water management benefits. Together, the findings build a strong case for making more space for plants, turf and trees in new housing developments.

The project brought together social research, economic modelling and on-ground demonstrations. More than 1,000 homeowners in new estates across Sydney, Melbourne and Adelaide were surveyed about their housing and garden preferences. Property sales data from Greater Western Sydney were analysed to assess the market value of green infrastructure. Field trials compared artificial and natural turf, tested backyard cooling options such as misting and green facades, and demonstrated an infiltration trench to retain stormwater on a private lot. Outputs included peer‑reviewed research, industry articles, conference presentations, an industry workshop, videos, and a technical drawing for an infiltration trench.

The project addressed the challenge that modern housing estates are being built with larger homes and less outdoor green space, despite expectations for liveable, climate‑resilient communities. Limited evidence had previously been available to show the benefits of private green infrastructure or its value to homeowners, developers and industry.

For growers and industry, the results show strong opportunities ahead. Almost half of surveyed homeowners preferred smaller homes with more outdoor space. Homes with more green infrastructure achieved higher sale prices, demonstrating a clear market premium. Natural turf was shown to be safer and cooler than artificial turf in summer, while irrigation, larger yard sizes and smart design reduced heat stress. Infiltration trenches proved effective at reducing stormwater runoff, supporting healthier landscapes and waterways. These findings support increased demand for plants, turf and green infrastructure in future residential developments.