The Mumbai Metropolitan Region Development Authority (MMRDA) is actively planning "Third Mumbai," officially known as the Karnala-Sai Chirner (KSC) New Town. This ambitious urban development project aims to create a new city from scratch, spanning 323.44 square kilometers in Maharashtra's Raigad district.
Designated as the New Town Development Authority (NTDA) for KSC New Town, the MMRDA is currently finalizing the land-use plan and masterplan. The vision is to build a modern urban center strategically positioned around new transport links, essential utilities, and emerging economic opportunities.
Strategic Location and Infrastructure Drivers
The concept of Third Mumbai gained significant momentum following the opening of the 21.8-kilometer Atal Setu bridge in 2024, which vastly improved connectivity between Mumbai and Navi Mumbai. This crucial infrastructure is expected to unlock considerable development potential in the wider Raigad region.
Further bolstering the case for planned development is the upcoming Navi Mumbai International Airport. Both the Atal Setu and the new airport serve as catalysts, aiming to capture the land value generated by these major infrastructure investments while ensuring organized, long-term urban growth.
Development Scope and Land Acquisition
The KSC New Town encompasses 124 villages across the Uran, Pen, and Panvel talukas. While the total area covers over 323 square kilometers, approximately 104 square kilometers are designated as developable land, with the remainder comprising villages, forests, and green zones.
Land acquisition for the project commenced in March 2026. Landowners are being offered various compensation options, including 22.5% developed land, direct monetary compensation, or compensation through Transferable Development Rights (TDR) or Floor Space Index (FSI). However, some local villages have expressed opposition, describing the acquisition as a "land grab," which has somewhat slowed the land-use survey process. The MMRDA anticipates the land-use plan to be ready by the end of August 2026.
Masterplan and Future Outlook
Singapore-based urban development consultancy Surbana Jurong has been appointed to prepare the comprehensive masterplan for the developable areas. This plan will detail the new town's layout, transport infrastructure, and fundamental utility provisions.
Experts highlight the critical importance of robust transport and employment opportunities for the project's success. Gulam Zia of Knight Frank noted that for Third Mumbai to function as a true satellite city rather than just a residential extension, it must offer fast and reliable mass transit and local job creation. Similarly, Mohit Malhotra, Founder & CEO of NeoLiv, believes the development will strengthen the broader Navi Mumbai-Raigad belt, enhancing connectivity for areas like Karjat and Khopoli, benefiting both residential and leisure sectors, and fostering new local businesses.
Gaurav K Singh, Founder & Chairman of Womeki Group, emphasized the unique opportunity to design a city from scratch, allowing for better road widths, planned green cover, and integrated townships from the outset. If executed effectively, Third Mumbai could serve as a blueprint for future satellite city developments.
The MMRDA has cautioned that Third Mumbai is a long-term endeavor, with significant returns unlikely within the first five to ten years. Its ultimate success hinges on the synchronized advancement of transport, employment, utilities, and meticulously planned urban development.