Yishun N3C27 Housing, Singapore

Project Summary

Khatib Bongsu, a once extensive mangrove network in Yishun, has undergone urbanisation and is now severely fragmented. The N3C27 development aimed to restore rich nature of the place by integrating the existing secondary forest, the adjacent mangrove patch, and the waterway link to Yishun Pond. 

bioSEA conducted a biodiversity and soil survey, identifying 190 animal species and high insect diversity in the secondary forest. Originally slated for clearance, bioSEA led the ecological aspects of the masterplanning process such that the site was planned as a residential district with a neighbourhood park, retaining the secondary forest as a core habitat space and incorporating a wetland as an ecological stepping stone.

A core conservation zone was established in the neighbourhood park, minimising ground disturbance. Thematic ecological zones were created for educational and recreational purposes. The project aimed to promote human-wildlife coexistence without conflict by elevating boardwalks abutting the forested zone.

The lack of guidance on nature-inclusive design in residential districts led to the creation of the Ecological Enhancements & Design Considerations report. It provided guidelines for landscape architects to include nature and establish natural zones with minimal human intervention. Environmental impact mitigation strategies were outlined, including phased construction and protecting core habitat zones.

bioSEA piloted a framework based on landscape ecology principles to assess the site’s pre- and post-construction ecological value. The assessment highlighted the value of the wetland in connecting the landscape and laying the foundation for future development. An ecosystem service evaluation assessed the benefits for residents and visitors.

Overall, the surveys, design approaches, and assessments aimed to conserve, protect, and celebrate the site’s high ecological value. The project emphasises the importance of nature in residential design, promoting sustainable development and the harmony between humans and the environment.

Associated Links

The design received the International Federation of Landscape Architects (IFLA) Award of Excellence 2022 for their strategic greening and masterful execution of biophilic and ecological design.