Colt DCS and RMZ Begins Construction of Third Data Centre in Mumbai to Support Growing AI Demand

• Part of a $1.7 billion investment under Colt DCS and RMZ's joint venture to develop data centre capacity across India 
• Signs its first hyperscale client for Mumbai 3 
• AI-ready facility delivering 64MW upon completion, powered entirely by renewable energy 
• Hybrid cooling design incorporating a closed-loop cooling system to enable near-zero wastewater 
• Expected to create more than 700 jobs across construction and operations 

 

Colt Data Centre Services (Colt DCS), a global provider of AI-ready, hyperscale and large enterprise data centres, and RMZ, India's largest privately owned real assets platform, today announced the commencement of construction of its third data centre in the city (Mumbai 3), an AI-ready facility located at the operator's Navi Mumbai Campus that will deliver 64MW upon completion. 

Mumbai 3 is being developed as part of Colt DCS and RMZ's joint venture (JV), announced in 2024, to invest $1.7 billion in the Indian data centre market. Ground preparation began in December 2025, and construction is now underway following the signing of the facility’s first hyperscale customer. This development is a milestone reflecting the pace at which the venture has scaled just within 18 months of signing. 

Mumbai 3 responds to growing demand for AI-ready data centre capacity in the region, where the rapid adoption of AI is driving requirements for larger deployments, higher rack densities and greater power capacity. With the data centre fully pre-let, the project will deliver critical AI-ready capacity to the Mumbai market while reinforcing Colt DCS and RMZ’s commitment to India’s growing digital infrastructure. 

Mumbai 3 will join existing data centres Mumbai 1 and Mumbai 2 at the Navi Mumbai Campus, which currently supports large enterprise and cloud workloads. The campus has the potential to deliver up to 148MW of capacity at full development and, upon completion, Mumbai 3 will increase the site's operational capacity to 86MW. 

 

Built for AI Deployments 

Mumbai 3 has been designed to support AI workloads and high-density compute deployments, delivering 64MW of secured contracted power, supported by a hybrid cooling architecture that combines traditional air cooling with direct liquid-to-chip cooling. The facility will also benefit from a 220kV GIS substation located on campus, providing high levels of resilience and scalability, alongside carrier-neutral connectivity with access to high-capacity fibre routes. 

 

Sustainable by Design, Creating Local Opportunity 

Sustainability and long-term community impact have been central considerations in the development of Mumbai 3. The facility will operate using 100% renewable energy and has been designed with a closed-loop cooling system, enabling near-zero wastewater from the cooling process. In addition to its environmental credentials, the project is expected to create more than 700 jobs across construction and operations, while supporting local suppliers, contractors, and service providers. These initiatives reflect Colt DCS and RMZ's shared commitment to delivering sustainable digital infrastructure that creates lasting value for local communities and the wider region. 

As part of the JV, both organisations have committed to develop 250MW of data centre capacity across Mumbai and Chennai.  The partnership brings together Colt DCS' global data centre expertise with RMZ's over two decades of experience in developing, owning and operating high-quality infrastructure in the Indian market.