Green Build Technology Ltd. is an investment holding company, which engages in the upgrading of existing housing estates using green architecture and green technology. It operates through the following segments: Insulation, Underground Utility Tunnel, Project Management, Materials Trading, and Others. The Insulation segment constructs and operates external insulation projects. The Underground Utility Tunnel segment produces underground tunnels for utility lines such as electricity, gas supply pipes and water supply pipes; and communications lines such as fibre optics, television and telephone cables. The Project Management segment consults service for external insulation project. The Materials Trading segment trades green technology materials. The Other segment focuses in investment holding. The company was founded on February 6, 2004 and is headquartered in Singapore.