Bangalore's Red Line Metro (Phase 3A): Route, Approval Stage and What Buyers Should Verify
Bangalore's proposed Red Line, officially Phase 3A of Namma Metro, would link Hebbal at the northern edge of town with Sarjapura on the south-eastern side. Many buyers confuse it with the Orange Line of Phase 3, which serves the west. This article lays out the alignment, how far the approvals have come by October 2026, and the questions worth asking before paying for a home near it.
Where the Approvals Stand
The Red Line has taken a slow road through the system. Here is the sequence:
- On 6 December 2024 Karnataka's cabinet cleared the project, putting its cost at Rs. 28,405 crore
- Afterwards, New Delhi sent the project report back because each kilometre looked too costly
- In February 2026 the BMRCL reworked the report, and the total fell to Rs. 25,999 crore
- In April 2026 the reworked report was despatched to the Centre
- In August 2026 the Union housing ministry told the Rajya Sabha that appraisal in detail was under way
The ministry offered no decision date. When the appraisal ends, the Union Cabinet must still sanction the line before money is released and contracts are tendered. The BMRCL is aiming to break ground in 2027 and finish by 2033, though both years hinge on that sanction.
Red Line and Orange Line Compared
The two phases have similar names but run through different parts of town. The Orange Line (Phase 3) is built from two corridors: one joins Kempapura with JP Nagar 4th Phase, the other joins Kadabagere with Hosahalli. The Red Line (Phase 3A) is a single long corridor.
- Orange Line length: 44.65 km, with 31 stations, every one elevated
- Red Line length: 37.8 km after revision, with 28 stations in the state-approved plan, 11 of them underground
- Orange Line price tag: Rs. 15,611 crore
- Red Line price tag: Rs. 25,999 crore after revision
- Orange Line status: sanctioned by the Union Cabinet in August 2024 and now at tender stage for civil work
- Red Line status: awaiting the Centre's decision
The approval is what matters most. The Orange Line carries the Union Cabinet's sanction. The Red Line has only the state's blessing, so money and a start date remain open questions.
Walking the Alignment from North to South
Seventeen of the 28 approved stations are elevated and eleven are underground. Roughly 14.28 km of track would run below the surface through the dense middle of the city, with the remainder on a viaduct.
The northern leg
Trains would start at Hebbal. Ganganagar comes first, then Mekhri Circle, then Palace Guttahalli, after which the track passes the golf course, then Basaveshwara Circle, and arrives at Town Hall by way of KR Circle. The Bellary Road approach to the city centre has no metro station now, so this leg fills a real gap.
The underground heart of the city
Beyond Town Hall, the route serves Shanthinagara, the NIMHANS neighbourhood, and then Dairy Circle. Koramangala gets two stations, at its 2nd and 3rd Blocks, and Jakkasandra and Agara follow. Streets here are tight, which is the reason this section goes underground.
The elevated stretch on Sarjapur Road
At Iblur on the ORR the train comes back up and travels above Sarjapur Road. Stops are planned at Bellandur Gate and Kaikondrahalli, then Doddakannelli and Carmelaram. Muthanallur Cross and Dommasandra come next, and a terminal in Sarjapura town ends the line.
Where the Red Line Meets the Network
A line gains value from the places where it joins others. Four interchanges are planned:
- Hebbal, where passengers can change to the airport-bound Blue Line or to the Orange Line
- KR Circle, shared with the Purple Line
- Dairy Circle, shared with the Pink Line
- Iblur, shared with the Blue Line that follows the Outer Ring Road corridor
Construction of the Blue and Pink lines continues, while Orange awaits its civil contracts. These junctions will deliver their full benefit only after all of them are running.
What the 2026 Revision Altered
Cost was the reason for the rework. Plans for stations at Kodathi Gate and Veterinary College were removed, while a terminal at Sarjapura was added. Underground stations were made more compact, and the below-ground stretch is now 14.28 km, against 14.44 km earlier.
The overall length is now 37.8 km, against 36.59 km before, since the alignment was refined. If a sales team shows an older station map, ask for the latest one. A flat advertised as close to a deleted station may now be well away from the line.
Neighbourhoods Likely to Benefit
Sarjapur Road benefits most. It has no metro at present and relies on one congested road, even though the belt between Iblur and Carmelaram is packed with apartment communities while Dommasandra and Sarjapura town expand quickly. Koramangala would receive its first stations.
Up north, Hebbal would turn into a large junction where three lines meet. Homes near Bellandur would get the Blue Line first, and the Red Line would later give a second link to the centre. All of this belongs to the 2030s, not to the present.
Putting a Planned Line in Perspective
Every metro line passes through four phases of life: a proposal, an approval, a building period and the opening day. The Red Line falls between the first two because the Centre has yet to sign off. Even lines that held every clearance have opened in Bangalore several years behind their first target.
The safer method is to judge a flat by what exists now. Roads, water, schools and the rush-hour drive should justify the price on their own. The metro then becomes a possible bonus for someone who will hold the home for a decade or longer.
A Checklist for Buyers Along the Corridor
Work through these points before handing over a booking amount:
- Find out whether the brochure refers to Phase 3 or Phase 3A.
- Ask which station serves the project on the latest alignment, then measure the walk on a map.
- Try the office-hour drive on today's roads.
- Set the price against a comparable project that is not near the proposed line.
- Look up the project's registration on the Karnataka RERA portal and match its phase and completion date.
- Test the monthly instalment against your budget in the EMI calculator.
A home that clears this list makes sense with or without the metro. One that makes sense only because of the metro carries a risk that no buyer can control.
