Use of Carbon Footprint of Building Materials for Public Housing Projects

Mr Dennis Tan Lip Fong asked the Minister for National Development (a) whether the carbon footprint of building materials used for public housing projects has any bearing on HDB tender outcomes; and (b) what targets have been set to reduce the carbon footprint of building materials procured for HDB projects.

Contractors tender for HDB projects based on designs and specifications provided by HDB which take into account life-cycle costs, sustainability and maintainability. The carbon footprint of building materials is not a direct criterion for tender evaluation.

Nevertheless, as the largest master planner and housing developer in Singapore, HDB has been actively driving sustainability efforts in the planning, design and development of public housing towns and estates. All new HDB public housing developments achieve BCA's Green Mark Gold certification or higher, while new public housing developments in new towns / districts (e.g. Tengah, Punggol, Bidadari, Tampines North & South) achieve Green Mark GoldPlus certification or higher. The Green Mark scheme encourages the adoption of sustainable building materials, including the use of recycled materials and low-carbon concrete. Currently, projects targeting the Green Mark GoldPlus certification or higher are required to compute the embodied carbon of concrete, glass, and steel used in construction.

Going forward, as part of the ongoing Cities of Tomorrow Research & Development (R&D) programme, HDB will study the use of alternative building materials to further reduce our carbon footprint. If the research outcomes are promising, the adoption of such materials will be balanced against other considerations such as availability, cost, quality and performance requirements.