Energy Modelling

Energy modelling is an integrated approach that provides a good gauge of the energy consumption of the building, identifies energy efficiency opportunities and gives an indication of how a building is going to operate. Higher-tier Green Mark Certifications (i.e. GoldPLUSor Platinum) are required to demonstrate energy savings through Energy Modelling. 


Energy performance of a building is measured by comparing the annual power consumption of the Proposed Model (designed building) against the Reference Model (baseline building).

General requirements

  • The Reference Model must meet minimum requirements stipulated in the Building Regulations including the Envelope Thermal Transfer Value (ETTV) and relevant Singapore standards
  • The Reference Model must be the same as the Proposed Model in shape, size and orientation
  • The Proposed Model must perform better than the Reference Model in total annual savings in energy consumption through:
    • Better building design
    • Higher Improved equipment efficiency 
    • Lower thermal transmittance of building envelope
    • Any other relevant methods
  • Simulation results from the Proposed Model must show at least 25% savings in annual energy consumption compared to the Reference Model for Green Mark GoldPLUSbuildings, or 30% energy savings for Green Mark Platinum buildings.

More resources

Download these documents for more information and submit required forms to BCA as part of your GMIS application.

Popular e-Services


The Construction Workforce Registration System (CWRS) is an online portal for CoreTrade and Multi-skilling registration and the renewal of Direct R1 eligibility.

Overseas Testing Management System

OTMS allows you to register the workers for Identity Verification and to check your registration status online.

Lifts and Escalators Application (LEAP) Portal

Lift and escalator owners, contractors and Specialist Professional Engineers (SPEs) can apply for and view applications for Permit to Operate (PTO) here.