The Mumbai Metro Rail Corporation (MMRC) has issued a fresh directive making it mandatory for any redevelopment, construction, excavation or demolition work within 50 metres of the Metro Line 3 route to obtain prior approval. The notice, released on 30 November 2025, applies to all structures along the 33.5-km underground corridor from Colaba to SEEPZ.
MMRC stated that no work can begin unless the developer or housing society secures a clearance from the Director (Planning and Real Estate). The rule covers early-stage activities like soil excavation, foundation digging and dismantling of old buildings. The authority explained that underground tunnels are sensitive to ground vibration, drilling and heavy machinery, so safety checks are essential before any construction begins.
The 50-metre “influence zone” has been part of earlier safety guidelines, but the latest notice reinforces the rule due to increasing redevelopment interest around the metro line. MMRC’s concern includes risks such as falling construction equipment, unstable scaffolding and any force that could impact tunnel stability or endanger pedestrians and workers.
One major reason for rising redevelopment activity is the Transit-Oriented Development (TOD) policy. Under the policy, properties located within 500 metres of select metro stations receive additional development benefits. For 10 Metro Line 3 stations, developers can access up to 5 FSI along with 35% fungible FSI for rehabilitation components. This has made these neighbourhoods attractive for large-scale redevelopment.
Over the last 1.5 years, MMRC has received 31 queries from 13 developers regarding TOD-linked redevelopment plans near Metro Line 3. Some well-known companies exploring these opportunities include K Raheja Corp, Prestige Group, Suraj Estate Developers and Valor Estate with more such proposals expected, the corporation now aims to ensure that each project follows strict safety parameters from the start.
For residents and societies, this means that before awarding redevelopment contracts or commencing groundwork, they must apply for an MMRC No-Objection Certificate. The approval process includes submitting building layouts, structural designs and execution plans. Construction can begin only after MMRC reviews and clears the proposal.
For developers, the directive adds an essential compliance step but also ensures a safer environment around critical infrastructure. MMRC believes that regulating construction close to tunnels will help reduce risks and protect the long-term strength of the metro network.
As redevelopment accelerates across Mumbai, especially near transit hubs, the updated rule seeks to strike a balance between growth and public safety. Metro Line 3 is one of the city’s most significant infrastructure investments and maintaining its structural security remains a top priority.
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Disclaimer – This article summarises publicly available information for general awareness. It is not legal or technical advice, always verify the latest MMRC rules before planning redevelopment or construction.
Source –
Hindustan Times
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