SOUTHEAST ASIA CONSTRUCTION11 Jun 2025
Changi Airport awards contract for intra-terminal tunnels at T5

A joint venture between Penta-Ocean Construction Co Ltd and Koh Brothers Building & Civil Engineering Contractor (Pte) Ltd has secured a S$999 million contract from Singapore’s Changi Airport Group (CAG) to build the intra-terminal tunnels at Terminal 5 (T5). Construction of the project is expected to take more than four years.

These intra-terminal tunnels will serve as underground connections within T5, supporting the efficient transfer of passengers and baggage across the terminal’s concourses, while also facilitating the routing of common utilities.

The tunnel system comprises a series of sub-tunnels that will house key infrastructure to support efficient airport operations. They include the automated people mover system and baggage handling system, as well as a common services tunnel (CST) which will contain dry and wet utilities such as electrical power, communication systems and water services. The works also comprise a ventilation building that supports the CST, and provisions for a future underground infrastructure tunnel.

“The award of the T5’s intra-terminal tunnel works marks another important development in the construction of T5 and the wider Changi East project. These tunnels will enable the smooth and efficient movement of passengers, baggage and services,” explained Ong Chee Chiau, CAG’s managing director for Changi East. 

“We are pleased to partner two highly reputable construction companies on the project – Penta-Ocean, recognised for its extensive expertise and technical proficiency in undertaking large-scale projects such as land reclamation within Singapore and internationally; and Koh Brothers, a key player in shaping Singapore’s infrastructure development with a strong track record in delivering complex, large-scale projects locally.”

T5 is part of the larger Changi East development that includes Changi Airport’s third runway, as well as cargo complexes and other supporting aviation and ground transport infrastructure. The groundbreaking ceremony of T5 was held last month, with Phase 1 slated for completion in the mid-2030s.

Image: Changi Airport Group