Chennai Metro's Yellow Line (Corridor 4) is reported to open its first operational stretch — a 14.6km section running from Poonamallee Bypass to Vadapalani — on October 11, 2026, with Prime Minister Narendra Modi and Tamil Nadu Chief Minister C. Joseph Vijay expected to inaugurate it. The stretch covers five stations: Poonamallee Bypass, Thelliyaragaram, Porur Bypass, Porur Junction, and Vadapalani, giving Chennai's western suburbs a direct metro option for the first time.

Quick answer: This is a real, substantially-confirmed opening — multiple independent reports agree on the date, route and stations — but at least one source frames the October 11 date as "likely" rather than fully locked in, so treat it as highly probable rather than guaranteed until CMRL's own confirmation lands. The stretch connects Poonamallee and Porur to Vadapalani, not yet to the wider Chennai Metro network beyond that, since the Yellow Line is still under construction toward its eventual 27-station, 26.1km full length.

What's Opening on October 11

The initial stretch is part of Chennai Metro Phase 2's Corridor 4 (the Yellow Line), running between Poonamallee Bypass and Vadapalani — two elevated and underground sections covering 14.6km with five stations: Poonamallee Bypass (terminus), Thelliyaragaram, Porur Bypass, Porur Junction, and Vadapalani (terminus). Fares for this stretch have reportedly already been finalised ahead of launch.

What's Confirmed — and What Isn't

  • Confirmed: The Poonamallee Bypass-Vadapalani stretch, its five stations, and its role as part of Corridor 4/the Yellow Line under Chennai Metro Phase 2 — corroborated across multiple independent reports.
  • Reported as likely, not yet fully locked: The specific October 11, 2026 inauguration date and the inaugurating dignitaries. At least one source frames this with "likely to inaugurate" rather than stating it as confirmed — treat the date as highly probable but check CMRL's own announcement before making firm plans around it.
  • Not yet operational: The rest of the Yellow Line. The full corridor is planned to eventually reach 27 stations across 26.1km (a mix of underground and elevated sections) — this opening is the first stretch, not the completed line.

Corridor Pricing Today

Here's what Propspedia's own live listings data shows for the corridor right now, before the connectivity effect of an operational metro station has had time to show up in pricing:

  • Poonamallee: average ₹5,324/sq.ft., roughly flat recently.
  • Porur: average ₹9,053/sq.ft., down slightly (~2.6%) in the most recent period.
  • Vadapalani: averaging considerably higher, in the ₹20,000+/sq.ft. range, reflecting its status as an already-established, centrally-located Chennai neighbourhood rather than an emerging metro-adjacent suburb.

The price gap between Poonamallee/Porur and Vadapalani is wide — Vadapalani is already a mature, high-demand locality, while Poonamallee and Porur are the stations where a new, direct metro connection is the bigger relative change. If there's a connectivity-driven price effect on this stretch, it's more likely to show up first in Poonamallee and Porur than in Vadapalani, which doesn't have as much room left to re-rate on connectivity alone.

What This Means If You're Buying on This Corridor

A metro station opening is a real, usable amenity from day one — not a future promise — which is a meaningfully different situation from buying on the strength of a planned-but-unbuilt extension. That said, a single opening date doesn't instantly reprice a corridor: commute-time improvements take time to show up in buyer behaviour and, in turn, in transacted prices. If you're evaluating Poonamallee or Porur specifically for the new metro access, it's worth asking what a project's actual walking distance to Poonamallee Bypass, Porur Bypass, or Porur Junction station is — "near the metro" can mean very different things depending on the specific station and street.

Frequently Asked Questions

Is the Chennai Metro Yellow Line fully open now?
No — only the first stretch, Poonamallee Bypass to Vadapalani (five stations, 14.6km), is reported to be opening on October 11, 2026. The full Yellow Line is planned to eventually reach 27 stations across 26.1km.

Is the October 11 opening date confirmed?
It's reported consistently across multiple sources, but at least one describes it as "likely" rather than officially locked in. Treat it as highly probable and check CMRL's own announcement before finalising plans around the exact date.

Which stations are opening?
Poonamallee Bypass, Thelliyaragaram, Porur Bypass, Porur Junction, and Vadapalani.

Has this already pushed up property prices in Poonamallee and Porur?
Propspedia's current live listings show Poonamallee roughly flat and Porur down slightly in the most recent period — there's no sign yet of a connectivity-driven price jump, which is typical, since these effects tend to show up gradually rather than immediately on an opening date.

Propspedia Verdict

A real, substantially-confirmed metro opening that gives Chennai's western suburbs — specifically Poonamallee and Porur — a genuine, immediate connectivity upgrade, not a speculative future promise. Current pricing on the corridor doesn't yet show any connectivity bump, which makes this a "watch from here" moment for Poonamallee and Porur rather than a "the opportunity already happened" one. Vadapalani, as the already-established end of this stretch, is a different story — its pricing reflects its existing maturity, not this specific opening.