Namma Metro Phase 3A And Peripheral Ring Road: What's Actually Happening On Sarjapur Road In 2026
Sarjapur Road has spent the better part of a decade as Bangalore's most talked-about, most-delayed infrastructure story. In 2026, two long-pending projects have finally moved from paper to the ground: Namma Metro Phase 3A, the Hebbal-Sarjapur Red Line, and the Peripheral Ring Road (PRR), now officially called the Bengaluru Business Corridor. Here is where both stand, verified against the latest official and industry updates.
On the metro front, Bangalore Metro's Phase 3A was approved by Karnataka Government's Cabinet on December 6, 2024 and is now awaiting Government of India's approval. The corridor, officially spanning 36.59 km connecting Koramangala, Dairy Circle, Agara, Bellandur, Carmelaram and Sarjapur, cleared Karnataka cabinet on December 6, 2024, with the DPR revised in October 2025 to bring total cost down to Rs 28,405 crore. The revision was significant: the revised Detailed Project Report, reviewed and optimised by international consultancy firm SYSTRA, brought the per-kilometre cost down from ₹767 crore to ₹688 crore, a reduction of ₹2,920 crore from the earlier estimate.
The first visible, on-ground sign of progress arrived quietly. Something quiet but significant has been happening along Sarjapur Road since January 2026 — teams have been conducting geotechnical surveys, or soil testing, at regular intervals along the corridor. For homebuyers tracking the project, this matters because geotechnical surveys along the Sarjapur Road corridor began in January 2026, marking the first on-ground activity for the Red Line. The line is now waiting on one final sign-off. The project is now awaiting Central Government approval, where the Union Cabinet holds a 50 per cent equity stake in Namma Metro, and central approval is expected before end-2026, after which full construction will commence.
Once sanctioned, the timeline stretches well into the next decade. The project is targeted for completion and operations by December 2030. For Sarjapur Road residents specifically, the relevant stops are clear: the Red Line stations closest to Sarjapur Road residential areas are Carmelaram, Agrahara Road, and Sarjapur at the southern end, followed by Doddakannalli, Kaikondrahalli, Bellandur Gate, Ibballur, and Agara moving northward, with Carmelaram and Doddakannalli the most relevant for buyers in the Sarjapur–Gunjur–Varthur belt. Beyond the immediate neighbourhood, the corridor carries wider structural value. Phase 3A's structural significance is that it directly connects North Bengaluru (Hebbal, the airport corridor) to East Bengaluru (Sarjapur, the tech corridor) via central employment nodes, compressing a commute that currently takes 60 to 90 minutes via ORR to 45 to 60 minutes via direct metro.
While the metro clears bureaucratic hurdles, the Peripheral Ring Road has moved further along. Officially rebranded as the Bengaluru Business Corridor, the 73-kilometre corridor is designed as an eight-lane expressway connecting Tumakuru Road to Hosur Road via key arterial routes including Ballari Road, Old Madras Road and Sarjapur Road, with officials anticipating the project will reduce city traffic by 40 per cent once operational. The road will not just move cars — it is designed for future transit too, as the corridor will feature service roads on both sides, along with provisions for a future metro line, cycling tracks and pedestrian walkways.
On execution, the project has cleared a major hurdle after two decades of delay: environmental clearance is secured, and the Bangalore Development Authority has floated global tenders worth Rs 3,348 crore for the first 20-kilometre stretch in March 2026, with the project being executed through a special-purpose vehicle called Bengaluru Business Corridor Ltd, with funding arranged via loans from the Housing and Urban Development Corporation. Land acquisition, historically the biggest bottleneck, has also gathered pace: by early 2026, over 600 landowners consented, with options like 2-3x guidance value cash, TDR, or enhanced FAR on remaining plots. Officials are now targeting a phased rollout, with first-phase completion eyed for mid-2027, per Deputy CM DK Shivakumar.
For Sarjapur Road buyers, the combined effect of these two projects is the real story. Historical precedent from Bangalore's own metro corridors offers a useful benchmark: based on Bangalore's metro history, properties within 1 to 2 km of confirmed metro stations typically appreciate 15 to 25 per cent in the run-up to inauguration. Analysts tracking the corridor specifically point to steady, compounding gains rather than a single price spike — for Sarjapur Road specifically, industry analysts project 12 to 14 per cent annual appreciation through 2030, factoring in the Phase 3A catalyst. Pricing data already reflects this anticipation: Sarjapur Road's current Rs 12,150 per sqft average, up 84.1% over three years, is already pricing in Phase 3A speculation.
The practical takeaway for anyone evaluating a home on this corridor in 2026 is patience paired with timing. Both projects are real, funded, and moving — but neither is imminent. Phase 3A is real, structurally important, but long-dated, with the structural appreciation cycle running through 2030 to 2033 operational milestones — this is a 5 to 8 year hold thesis, not a 12 to 24 month flip. Buyers who understand this horizon, and who prioritise proximity to confirmed station catchments like Carmelaram and Doddakannalli or PRR-adjacent stretches, are positioned to capture the pre-sanction pricing advantage before either project reaches full operational status.
