Few infrastructure projects are cited in Bengaluru property marketing as often as the Sarjapur Road metro. Brochures and listings frequently describe projects as metro-adjacent. The reality, as of early October 2026, is more measured: the line is approved by the Karnataka government, its design has been revised to cut costs, and it is still awaiting approval from the Union government, which is required before construction can begin.

This explainer separates what is sanctioned from what is proposed, so that buyers can price the metro correctly.

The status in one paragraph

The Hebbal–Sarjapur corridor, Phase 3A of Namma Metro and referred to as the Red Line, received Karnataka state cabinet approval on 6 December 2024. Rail Analysis India reported that approval at ₹28,405 crore for a 36.59 km line with 29 stations. After the Union government asked for cost reductions, a revised plan was submitted in April 2026 at about ₹25,999 crore, according to Asianet Newsable, which also reported that central approval was expected around October 2026 and that the opening had moved to April 2033. On our reading of published reporting up to early October 2026, we found no report that the Union Cabinet has approved the line.

Sanctioned, under construction and proposed: the distinction

  • Operating near Sarjapur Road: none directly. The Yellow Line's Central Silk Board station, open since August 2025, is among the nearest operating stations to the corridor's inner end.
  • Sanctioned and under construction: the Blue Line along the Outer Ring Road, which crosses the corridor's inner end with stations including Agara and Ibbaluru. ANAROCK's 2025 Sarjapur Road report noted this line will pass the easternmost part of the corridor with a station at Iblur. Business Today reported ORR trial runs expected from October 2026.
  • State-approved, awaiting Union approval: the Hebbal–Sarjapur Red Line (Phase 3A).

Why Union approval matters

Namma Metro is a joint venture in which the Centre holds a 50% equity stake, so new corridors need Union Cabinet approval before funding and construction can proceed, as noted in the line's public project summary. Until that approval arrives, there are no civil tenders for the main works, and every timeline is an estimate.

Asianet Newsable reported that BMRCL revised the plan after the Union government requested cost reductions, including shorter underground platforms, smaller stations and alignment adjustments. Separate reporting noted the revision followed a review by the consultancy Systra and a revised detailed project report in February 2026, which civic data portal OpenCity has published.

The revised line, by the numbers

  • Cost: reduced from ₹28,405 crore to about ₹25,999 crore, still about ₹706 crore per km, making it the most expensive metro line planned in Bengaluru (Asianet Newsable).
  • Length: reported at about 37 to 37.8 km in the revised plan (Asianet Newsable; Wikipedia), against 36.59 km in the December 2024 approval.
  • Stations: 28 in the published revised list (Wikipedia), against 29 in the original approval.
  • Operations: 35 trains instead of 30, with peak-hour services every 4.5 minutes (Asianet Newsable).
  • Opening: April 2033, two years later than earlier plans (Asianet Newsable).

Stations along Sarjapur Road

From the Hebbal end, the line runs through the city centre to Koramangala, then south-east. On the published revised list, the stations relevant to Sarjapur Road buyers are: Agara, Ibbaluru, Bellandur Gate, Kaikondrahalli, Doddakannelli, Carmelaram, Ambedkar Nagara, Muthanalluru Cross, Dommasandra, Sompura, Kada Agrahara Road, Sarjapura and Sarjapura Terminal Station. Station names and locations can change before final approval, and Asianet Newsable reported that several stations were redesigned or shifted in the revision.

What happens after Union approval

Approval is a beginning, not a finish line. After a Union Cabinet decision, BMRCL would still need to finalise funding, acquire land for stations and depots, and tender the civil packages. The original approval described a line with roughly 17 km underground and 19 km elevated, according to Rail Analysis India, and underground sections through the city centre typically take the longest to build.

Bengaluru's own record is a useful guide. The Blue Line along the ORR, approved earlier, has seen its target dates move repeatedly; Native Planet reported its full completion target moving from December 2027 to March 2028. The Pink Line's elevated stretch on Bannerghatta Road was reported complete in September 2026 but was still awaiting inspection and inauguration. Buyers should assume that any metro timeline can slip, and that the period between approval and opening is measured in years. The signals worth watching next are listed below.

  • A Union Cabinet approval announcement for Phase 3A, which Asianet Newsable reported as expected around October 2026.
  • BMRCL tender notices for the corridor's civil packages, which signal that construction is genuinely starting.
  • Any further changes to station locations, particularly at the outer Sarjapur Road end.
  • Progress on the ORR Blue Line, which will deliver the first metro access to the corridor's inner end.

What this means for property prices

JLL India, as cited by Realty Today in January 2026, has found that homes within about 2 km of upcoming metro corridors tend to outperform by 5% to 25% over a five- to seven-year cycle. For Phase 3A, that cycle has barely started: construction has not begun, and the reported opening is seven years away.

Sarjapur Road's prices already reflect strong demand without the metro. ANAROCK's Q2 2026 average quoted rate for the corridor was ₹11,560 per sq ft, among the highest of its tracked Bengaluru micro-markets, and its January 2025 report recorded about 62% appreciation between 2018 and Q3 2024. A buyer should not pay an additional premium today for a station that may open in 2033.

How to read metro claims in listings

  • Ask which line and which phase. Blue Line stations on the ORR are under construction; Red Line stations on Sarjapur Road are not yet sanctioned by the Union government.
  • Ask for the station name on the published alignment and measure walking distance yourself.
  • Treat any completion year before 2033 for the Sarjapur Road stations with caution, given current reporting.
  • Value the home on today's commute. Count the metro as long-term upside, not as part of the price.

Who benefits most if the line proceeds

If the Union approval comes through and construction proceeds, the largest relative benefit is likely on the outer stretch, around Dommasandra, Kada Agrahara and Sarjapura, where road congestion is the main constraint and prices are lower. Square Yards lists Dommasandra near ₹10,250 per sq ft and Sarjapur town near ₹9,700 (June 2026), against inner pockets such as Kaikondrahalli near ₹18,650. The inner stretch near the ORR benefits sooner from the Blue Line.

Our view

The Sarjapur Road metro is a real project with state approval, a revised plan and a published alignment. It is not yet sanctioned by the Centre, and its reported opening is April 2033. Buyers should value Sarjapur Road homes on today's commute and the Blue Line's progress at the ORR end, and treat the Red Line as a long-dated option. When Union approval is announced, we will update this page.