Colt Data Centre Services (Colt DCS) and Indian real assets developer RMZ have begun construction of Mumbai 3, a 64-megawatt (MW) AI-ready data centre at their Navi Mumbai campus. The facility is fully pre-let to a hyperscale customer and will combine direct liquid-to-chip cooling, enhanced power infrastructure and renewable energy to support high-density artificial intelligence (AI) and high-performance computing workloads. The project forms part of the companies’ $1.7 billion joint venture to expand India’s data centre infrastructure.
AI Infrastructure Expansion Drives Mumbai 3 Development
The project marks a new phase in the companies’ joint venture, announced in 2024, which plans to invest $1.7 billion in India’s data centre market. Ground preparation for Mumbai 3 began in December 2025, and construction moved forward after the facility secured its first hyperscale customer.
According to Colt DCS and RMZ, the development has been fully pre-let, indicating that its capacity has been contracted before completion. The companies say the project reflects demand for larger data centre deployments and infrastructure capable of accommodating increasingly intensive AI workloads.
Mumbai 3 will join Mumbai 1 and Mumbai 2 at the Navi Mumbai Campus, which serves enterprise and cloud computing requirements. The campus has the potential to support up to 148MW of capacity at full development. Once Mumbai 3 is completed, the site is expected to have 86MW of operational capacity.
Liquid Cooling and Power Infrastructure Target High-Density AI
The facility is designed around the requirements of high-density computing, where AI accelerators and other high-performance processors can generate substantial heat and require significant electrical capacity.
Mumbai 3 will use a hybrid cooling architecture combining conventional air cooling with direct liquid-to-chip cooling. Liquid cooling transfers heat away from processors through a liquid-based system, helping data centre operators manage thermal loads that can be difficult to address using air cooling alone.
The facility will also have access to a 220-kilovolt gas-insulated switchgear (GIS) substation on campus. This power infrastructure is intended to support the facility’s electrical requirements, resilience and future scaling. Carrier-neutral connectivity and access to high-capacity fibre routes will provide additional network options for hyperscale customers.
These capabilities matter as AI infrastructure increasingly requires coordinated investment in computing hardware, power delivery, cooling and connectivity. Data centre capacity measured in megawatts is only one part of the equation: operators must also ensure that individual halls and racks can support customers’ specific equipment configurations and workload requirements.
The International Energy Agency’s Energy and AI report projected that global data centre electricity consumption could reach approximately 945 terawatt-hours annually by 2030 under its 2025 base-case scenario, with AI identified as a major growth driver.
The projection illustrates why power availability and thermal management have become central considerations in new data centre developments.
Renewable Energy and Water Management Shape Design
Colt DCS and RMZ say Mumbai 3 will operate using 100% renewable energy and employ a closed-loop cooling system designed to generate near-zero wastewater from the cooling process.
These commitments address two environmental considerations associated with data centre expansion: electricity sourcing and water use. However, renewable energy procurement does not by itself establish that a facility will have zero emissions across its full lifecycle. Its environmental performance will also depend on energy sourcing arrangements, efficiency, equipment and construction impacts.
Similarly, a closed-loop cooling design can reduce water discharge, but its overall water footprint depends on the system configuration and operating conditions. Independent performance data will be needed to assess the facility’s actual environmental impact once it is operational.
The development is also expected to create more than 700 jobs across construction and operations. The companies anticipate opportunities for local suppliers, contractors and service providers, although the announcement does not specify how those jobs will be distributed between temporary construction work and long-term operational roles.
Joint Venture Targets 250MW Across Mumbai and Chennai
Mumbai 3 forms part of a wider commitment by Colt DCS and RMZ to develop 250MW of data centre capacity across Mumbai and Chennai through their joint venture.
The partnership combines Colt DCS’s international data centre operating experience with RMZ’s Indian real estate and infrastructure development background. Its strategy aligns with broader investment in Indian digital infrastructure as cloud adoption, enterprise workloads and AI computing increase demand for capacity.
JLL’s India data centre market research published in August 2026 estimated that national capacity could grow from 1.6GW in mid-2026 to 6GW by 2029.
JLL Such forecasts are not guarantees, but they highlight the scale of investment that operators and infrastructure partners are pursuing.
For Colt DCS and RMZ, the immediate priority is delivering Mumbai 3’s contracted capacity while meeting customers’ requirements for power, cooling, connectivity and operational reliability. The project’s longer-term significance will depend on execution, energy performance and the ability to accommodate evolving AI hardware.
As hyperscale deployments grow, developments such as Mumbai 3 show how AI infrastructure is increasingly being shaped by physical constraints as much as by advances in computing technology.
Market Landscape
India’s data centre sector is attracting investment as enterprises migrate workloads to the cloud and AI applications increase demand for compute-intensive infrastructure. Mumbai and Chennai remain important markets for hyperscale facilities, supported by connectivity, enterprise demand and established digital infrastructure.
The IEA’s 2025 analysis projected global data centre electricity use at about 945TWh by 2030, while JLL’s 2026 India report projected national data centre capacity reaching 6GW by 2029.
Mumbai 3 competes in this expanding market through its pre-let 64MW capacity, direct liquid-to-chip cooling, dedicated high-voltage power infrastructure and renewable-energy commitment. Its execution will depend on timely delivery, dependable power availability, efficient cooling and the ability to meet hyperscale customers’ technical requirements.
Top Insights
- Colt DCS and RMZ have started construction of Mumbai 3, a 64MW AI-ready facility fully pre-let to a hyperscale customer.
- Direct liquid-to-chip cooling and conventional air cooling will support thermal management for high-density AI and high-performance computing deployments.
- A 220kV on-campus GIS substation and carrier-neutral connectivity are designed to support power resilience and hyperscale infrastructure requirements.
- The companies plan to use 100% renewable energy and closed-loop cooling while creating more than 700 jobs across construction and operations.
- Mumbai 3 is part of a $1.7 billion joint venture targeting 250MW of data centre capacity across Mumbai and Chennai.
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