Karnataka's transit map is about to get a lot bigger. Karnataka is on the verge of a transit revolution with a proposal to extend Bengaluru's Namma Metro all the way to Tumakuru, marking the state's very first inter-district metro service. For homeowners and investors along the Tumkur Road corridor, this is one of the most closely watched infrastructure stories of the year.
The project has moved steadily from concept to concrete planning. The Bangalore Metro Rail Corporation Limited (BMRCL) has given the green light for a new metro line running from Madavara (BIEC) station to Tumkur Bus Stand, spanning an estimated 52.41 kilometers. This planned 52.41 km Namma metro line to Tumkur will be an elevated extension of the existing 33.53 km Green Line (Anjanapura - Madavara), constructed under the Public-Private Partnership (PPP) model. The alignment will follow Tumkur Road (National Highway NH-4).
BMRCL commissioned a detailed feasibility study to firm up the plan. Last December, BMRCL awarded a Rs 1.26-crore contract to Hyderabad-based Aarvee Engineering Consultants to prepare a detailed project report (DPR). That study has since progressed well beyond the drawing board. The feasibility study report for the 56.6 km metro line has been completed and submitted to the Bangalore Metro Rail Corporation Limited (BMRCL), which in turn has forwarded it to the state government. Plans include the construction of 25 elevated stations along the route, starting from Madavara (BIEC) station on Bengaluru's Green Line and extending all the way to Shira Gate in Tumkur.
The project has now cleared another key milestone. After the formal submission of a BMRCL report to Karnataka Home Minister G Parameshwara and Chief Secretary Shalini Rajneesh at Vidhana Soudha on Saturday, the ambitious transit project is now headed straight to the state cabinet for final deliberations. On costs, Parameshwara, who is also the district in-charge minister for Tumakuru, said around Rs 3.5 crore had been spent on the study and that the report strongly endorsed the project's feasibility. The DPR has proposed two implementation models — one involving direct execution by BMRCL at an estimated cost of Rs 18,000 crore, and a Public-Private Partnership (PPP) model costing around Rs 20,000 crore.
Ridership projections underline why the corridor matters. The new stretch is expected to cover nearly 60 km from Madavara on Bengaluru's outskirts to Tumakuru along the National Highway corridor, serving residential and industrial clusters in Nelamangala and Dabaspet, with a projected daily ridership of around 3 lakh passengers.
Not everyone agrees a conventional metro is the best fix. Bengaluru South MP P C Mohan has pointed to the Economic Survey 2025–26 proposal for a Namo Bharat Regional Rapid Transit System (RRTS) corridor between Bengaluru and Tumakuru, arguing a semi-high-speed rail network would be faster, cheaper and more practical, while other experts have suggested alternatives such as RRTS or expansion of the Bengaluru Suburban Rail Project (K-RIDE). Some urban planners go further, suggesting extending the existing Mallige suburban rail infrastructure from Chikkabanavar to Tumakuru could offer higher speeds and lower fares through dedicated heavy rail tracks using high-speed MEMU and metro-style AC coaches operating up to 110 kmph. Whichever mode is finally chosen, the intent is the same: faster, safer travel between Bengaluru and Tumakuru.
For now, the corridor sits under the broader umbrella of Namma Metro's long-term expansion. Another long-term proposal is a metro corridor connecting Madavara with Tumkur, which could improve connectivity between Bengaluru and rapidly developing satellite towns along the Bengaluru–Tumkur industrial corridor, and if implemented, help reduce congestion on the highway while supporting regional economic growth.
What does this mean for someone house-hunting today? Even at the proposal stage, transit news like this tends to move the needle on real estate sentiment along the corridor. Tumkur Road already benefits from the operational Green Line up to Madavara, and any credible extension plan — even years from full construction — adds to the area's long-term connectivity story. Homes located close to the existing metro stretch and the NH-48 corridor, such as those in Chikkabidarakallu near Nelamangala Toll Plaza, are well placed to benefit first, regardless of how the Tumkur extension eventually takes shape.
