The elevated Poonamallee-to-Porur stretch of Chennai Metro's Corridor 4 (Yellow Line) opened to the public in July 2026, after slipping from earlier December and June targets due to the Tamil Nadu Assembly election. It's the first operational segment of the full 26.1km corridor connecting Poonamallee to Lighthouse — and it's worth being precise about what that does and doesn't include.

Quick answer: What's actually open is the elevated section from Poonamallee through to Porur, including the Porur Junction and Porur Bypass stations. What is not open — and won't be for a while — is the underground stretch extending further east toward Kodambakkam and Lighthouse; Kodambakkam metro station itself is still under construction and currently targeted for December 2027. If you've seen this described as a "Porur-Kodambakkam" opening, that's ahead of where the project actually is — Kodambakkam is more than a year away.

What Actually Opened in July 2026

Corridor 4 runs 26.1km end to end, from Poonamallee to Lighthouse, as a mix of elevated and underground sections. The segment that opened is the elevated western stretch — Poonamallee through to Porur — including the Porur Junction and Porur Bypass stations. The launch had originally been expected as early as December, then June 2026, but slipped due to the Tamil Nadu Assembly election before finally opening in July.

What's Still Under Construction

The corridor continues east from Porur as an underground alignment toward Kodambakkam and onward to Lighthouse, connecting through areas like Vadapalani along the way. That underground section — including Kodambakkam metro station itself — is still under construction, with completion currently targeted for late 2027. That's a meaningfully different timeline from the stretch that just opened, which is why treating "Porur" and "Kodambakkam" as though they opened together would overstate where the project actually is today.

What Live Inventory and Pricing Look Like Right Now

Propspedia currently lists 9 live approved projects in Porur, priced from ₹80.1 lakh to ₹1.60 Cr, at an average of roughly ₹9,292 per sq.ft. — and Porur's own five-year price trend on Propspedia shows growth of 50.9%, the kind of run-up that typically reflects a locality that's already been pricing in its metro connectivity for some time rather than reacting to July's opening as new information.

Poonamallee, by contrast, has 6 live approved projects on Propspedia, priced from ₹17.4 lakh to ₹90 lakh, averaging around ₹5,300 per sq.ft. — meaningfully lower than Porur on a per-sq.ft. basis. That gap is worth reading carefully rather than assuming it will simply close: it may reflect Poonamallee being earlier in its own development cycle relative to Porur, not a guaranteed appreciation opportunity purely because the same metro line now reaches both.

Browse live listings in Porur · Browse live listings in Poonamallee.

What This Means If You're Buying Near This Corridor

  • The stations that matter today are Poonamallee through Porur — that's what's actually operational. Marketing that references "metro connectivity" for areas further east toward Kodambakkam is describing a late-2027 timeline, not a current one.
  • Porur's price trend already reflects years of anticipated connectivity — its 50.9% five-year growth predates this specific July opening, so treat the opening itself as confirmation of an existing story, not a fresh catalyst likely to repeat that growth rate going forward.
  • Poonamallee's lower current pricing isn't automatically a bargain — it may simply be an earlier-stage market. Worth comparing project quality, builder track record and amenity infrastructure directly rather than assuming metro access alone will equalise the two localities' pricing.

Frequently Asked Questions

Is the Chennai Metro Porur-Kodambakkam stretch open?
No — only the Poonamallee-to-Porur elevated section has opened, in July 2026. The underground stretch toward Kodambakkam is still under construction, with Kodambakkam station targeted for late 2027 (December 2027).

Which stations opened in July 2026?
The elevated stations along the Poonamallee-Porur stretch, including Porur Junction and Porur Bypass.

Why was the opening delayed from its original timeline?
The launch, originally targeted as early as December and then June 2026, was pushed back due to the Tamil Nadu Assembly election before finally opening in July 2026.

How do Porur and Poonamallee compare on price right now?
Porur has 9 live listings on Propspedia averaging about ₹9,292/sq.ft. with 50.9% five-year growth; Poonamallee has 6 live listings averaging about ₹5,300/sq.ft., with no comparable long-term trend data yet published.

Propspedia Verdict

A genuine, operational metro opening — not a marketing claim — but scoped narrowly to Poonamallee through Porur, not the fuller corridor some coverage implies. Porur's pricing already reflects years of anticipated connectivity; Poonamallee is the locality actually worth watching for whether this opening changes its trajectory from here, since its own price data doesn't yet show it.