Sustainability Report 2015

Singapore’s built sector consumes up to 38% of the nation’s electricity11 and employs close to 322,000 foreign workers12. To meet the challenges of skilled labour shortage and the rising cost of resources, CDL has invested in greener and more productive methods of building.

For over a decade, CDL has been investing 2% to 5% of a new development’s construction cost on eco-friendly designs and sustainable construction methods such as drywalls and Prefabricated Bathroom Units (PBUs)13. The use of PBUs improves construction productivity by up to 80% when compared with conventional bathroom construction methods and reduces construction waste while improving water tightness of the bathrooms. To date, CDL has installed more than 10,000 PBUs in our residential developments.

In October 2014, CDL announced that we would be the first developer in Asia to apply advanced construction technology, Prefabricated Prefinished Volumetric Construction (PPVC)14, for a large-scale residential development with 638 apartment units. Likely the largest application of PPVC of its kind in the world, over 5,000 building modules will be used to build CDL’s upcoming Executive Condominium at Canberra Drive in Sembawang, Singapore. Apart from mitigating environmental impact onsite, this technology is expected to raise construction productivity by over 40%, saving some 55,000 man days.

In another remarkable feat, our Tree House condominium achieved a Guinness World Record for the largest vertical garden in April 2014.

Case Study

A BCA Green Mark Platinum award-winning development, Tree House is a 429-unit eco-inspired condominium comprising four 24-storey towers and a vertical garden measuring 2,289 m2. Approximately 2.7% of the total construction cost was invested in green innovations, which has translated into an estimated annual energy savings of over 2.4 million kWh and water savings of 30,000 m3. By reducing heat absorption, the 24-storey, 2,289 m2 vertical garden is estimated to achieve air-conditioning energy savings of between 15% and 30%.

Designed for Energy Efficiency  
  • Energy-efficient inverter air-conditioning (NEA energy label with four ticks) and gas heaters for all apartments
  • Heat-reducing laminated green tinted windows
  • Lifts with Variable Voltage and Variable Frequency motor drive and sleep mode programming
  • Motion sensors at staircases that will activate lights automatically
  • T5 and LED lighting for common areas, lobbies and car parks
  • Energy savings from the energy efficient air-conditioners
  • Reduction of external heat gain
Designed for Water Efficiency  
  • Installation of water-efficient sanitary fixtures and fittings (with Water Efficiency Labelling Scheme) such as tap fittings, shower mixers and water closets
  • Use of water sub-meters to monitor water usage for key common areas
  • Rainwater harvesting system for irrigation of landscape
  • Water savings
  • Water usage is monitored to help reduce wastage
Designed for Good Indoor Environmental Quality
and Environmental Protection
  • Construction of vertical garden (extended to the west façade) that will act as bioshading device
  • Use of low formaldehyde adhesive for woodworks such as wardrobes, doors and kitchen cabinets
  • Use of low Volatile Organic Compound (VOC) paints for all internal walls and ceilings
  • Cools the environment and reduces the estate’s carbon footprints by filtering pollutants and carbon dioxide from the air
  • Improves air quality
Design Innovation and Other Green Features  
  • Dual-chute pneumatic waste collection system (for the segregation of domestic and recyclable waste)
  • Takes advantage of the site’s naturally sloping terrain by introducing bioswales15 that aid in the collection of rainwater for landscape irrigation purposes
  • Construction of green sky gardens at the 7th, 13th and 19th storeys of each block to create fresh and healthy living spaces
  • Encourages recycling to protect the environment
  • Treats surface runoff water by cleansing and filtration of pollutants before being used for other purposes

11 Source: BCA Energy Building Benchmarking Report 2014
12 Source: Ministry of Manpower (MOM) foreign workforce statistics, as at December 2014
13 PBUs are completed bathroom units preassembled off-site before installing in position onsite. Source:
14 PPVC are building modules that are made of multiple units complete with internal finishes, fixtures and fittings which are manufactured in factories before installation onsite in a lego-like manner. Source:
15 Bioswales are densely vegetated open channels constructed with gentle slopes to allow runoff to be filtered and directed for re-use or to public drains. Bioswales help to slow down the flow further and reduce the amount of storm water runoff.