Chennai Metro's Purple Line, Corridor 3 of Phase 2, runs from Madhavaram to SIPCOT Siruseri: about 45.4 km and 47 stations after CMRL's 2023 revision. The city section to Taramani is underground; the OMR section from Nehru Nagar to SIPCOT is elevated, roughly 20 km with about 20 stations. No part of it is open yet, and reported opening dates disagree.

Updated 11 October 2026, the day the first Phase 2 stretch (Poonamallee to Vadapalani, on Corridor 4) was reported for inauguration. That stretch is covered in our main article: Chennai Metro Poonamallee–Vadapalani Line Is Open: Timings, 11 Stations, Fares & Property Impact (2026)

How long is Corridor 3, and how many stations?

Figures vary with the date of the source. Metro Rail Today reported in June 2023 that CMRL had trimmed Corridor 3 from 45.8 km to 45.4 km, with 47 stations, as part of a wider cut to Phase 2. Wikipedia's Purple Line page still shows 45.8 km and 48 stations, split into 26.7 km underground and 19.1 km elevated, with depots at Madhavaram and Semmancheri.

For a buyer the split matters more than the total. The underground half, from Madhavaram through Perambur, Kilpauk, Nungambakkam, Mylapore and Adyar to Taramani, is the slower, costlier build. The elevated OMR half is the part most likely to open first.

Which stations are on the OMR section?

Wikipedia's station table lists 20 elevated stations from Nehru Nagar to SIPCOT, in this order. Earlier press coverage of the OMR stretch (Swarajya and India Infra Hub, May 2023) gives essentially the same list with minor spelling differences. CMRL signage may use different names, so treat these as working names:

  • Perungudi end: Nehru Nagar, Kandanchavadi, Perungudi.
  • Thoraipakkam belt: Thoraipakkam, Mettukuppam, PTC Colony, Okkiyampet, Karapakkam, Okkiyam Thoraipakkam.
  • Sholinganallur: Sholinganallur, Sholinganallur Lake I, Sholinganallur Lake II. Sholinganallur is also the southern terminus of the Red Line (Corridor 5), per Wikipedia's station tables for both lines.
  • Semmancheri: Semmancheri Depot, Semmancheri I, Semmancheri II.
  • Navalur to Siruseri: Gandhi Nagar, Navallur (Navalur), Siruseri, SIPCOT 1 and SIPCOT 2.

When will the OMR metro open?

Sources disagree, and we have not found a CMRL announcement that settles it. Propspedia (published 27 September 2026, updated 2 October) says the elevated Nehru Nagar to Siruseri SIPCOT section was originally slated for June 2026 and is now expected by December 2026, with the underground section targeted for 2028. Wikipedia's station table shows December 2027 for the elevated stations and December 2028 for the underground ones.

What is verifiable is progress, not a date. Swarajya reported on 18 July 2026 that piling and U-girder casting were 100% complete on the Nehru Nagar to Sholinganallur stretch (contract C3/EV-01, executed by Larsen & Toubro): 3,066 piles and 582 precast U-girders. Track, systems, stations and testing still have to follow, and the first Phase 2 stretch took several months from safety approval to its 11 October 2026 opening. Our reading: plan around 2027 for the OMR section and 2028 for the city section, and treat December 2026 as optimistic until CMRL confirms trials.

Where does Corridor 3 meet the other lines?

What it means for OMR homes

OMR's housing demand has been built on IT employment and road access, not rail. The metro changes the daily commute most for households living within walking distance of a station who work along the same corridor or in the city centre once the underground section opens. It changes little for homes 3 to 4 km inland from OMR. Below are catalogue projects grouped by the locality in their listing. We have not measured walking distance to a station; check that on foot before deciding.

Thoraipakkam and Karapakkam: Ceebros Boulevard, ready to move, 2 and 3 BHK, ₹0.66 to 1.35 crore (Ceebros Boulevard Thoraipakkam). Radiance Mandarin, 2 and 3 BHK, ₹0.95 to 1.70 crore, possession listed September 2027 (Radiance Mandarin). Radiance Eternity, 2 to 4 BHK, ₹1.78 to 3.52 crore, December 2028 (Radiance Eternity Thoraipakkam). Baashyaam Enchanted, 3 and 4 BHK, ₹2.20 to 3.60 crore, September 2030 (Baashyaam Enchanted Thoraipakkam). In Karapakkam, Doshi Risington, 1 to 3 BHK, ₹0.46 to 1.50 crore, December 2027 (Doshi Risington Karapakkam), and Casagrand Savoye, ready, ₹0.71 to 1.28 crore (Casagrand Savoye Karapakkam).

Perungudi: Akshaya Rhythm, ready, 3 BHK, ₹1.34 to 1.57 crore (Akshaya Rhythm Perungudi). Nahar Arista, 3 BHK, ₹1.73 to 1.96 crore, March 2028 (Nahar Arista Perungudi).

Sholinganallur: Brigade Altius, 3 and 4 BHK, ₹1.92 to 7.58 crore, March 2030 (Brigade Altius Sholinganallur). Urbanrise Whispers of Sky, 3 and 4 BHK, ₹1.35 to 2.18 crore, December 2028 (Urbanrise Whispers Of Sky Sholinganallur). Ready options include Adroit Fortune, ₹0.76 to 0.95 crore (Adroit Fortune Sholinganallur), and Radiance Sapphire off OMR, ₹0.65 to 0.81 crore (Radiance Sapphire Sholinganallur).

Semmancheri: Casagrand Ariana, 2 and 3 BHK, ₹0.68 to 1.25 crore, June 2028 (Casagrand Ariana). DAC Cambridge, ₹0.79 to 1.40 crore, December 2030 (Dac Cambridge Semmancheri). Jains Aadhya, compact 1 and 2 BHK, ₹0.42 to 0.69 crore, October 2029 (Jains Aadhya Semmancheri).

Navalur: Appaswamy Cerus, ₹0.75 to 1.38 crore, December 2027 (Appaswamy Cerus). Jains Anushree, ₹0.55 to 0.84 crore, January 2029 (Jains Anushree Navalur). DRA Harmony, ₹0.59 to 0.85 crore, ready to move (completed March 2026, per DRA); ask for the TNRERA number (Dra Harmony Navalur). Radiance Edgewood, 3 and 4 BHK, ₹2.49 to 4.05 crore, January 2029 (Radiance Edgewood Navalur).

Siruseri: Casagrand Jarvis, 3 and 4 BHK, ₹0.89 to 1.39 crore, March 2028 (Casagrand Jarvis Siruseri). Urbanrise Codename The Game Changer, ₹0.53 to 0.73 crore, December 2026 (Urbanrise Codename The Game Changer Siruseri). Isha Symphony Villa, ₹1.25 to 2.53 crore, February 2027 (Isha Symphony Villa Siruseri).

Padur and Kelambakkam lie south of the SIPCOT terminus, so they are beyond the line as planned. Projects there, such as TVS Emerald Isle and Godrej Azure in Padur, should be judged on road access to SIPCOT, not on the metro. Guide: OMR South Buyer's Guide 2026: Padur, Siruseri, Semmancheri and Navalur Compared

All prices are indicative and change with the developer's price sheet; possession dates are as listed by the developer.

And along the underground city section?

The underground half matters for buyers in North and Central Chennai, on a longer clock (2028 in both Propspedia and Wikipedia). Catalogue examples by locality: Madhavaram, at the northern end, has several new launches including DRA Astra in Moolakadai (Dra Astra Madhavaram Moolakadai) and Prestige Palm Court (Prestige Palm Court Madhavaram); Perambur has Casagrand Mercury (Casagrand Mercury Perambur) and SPR Sky Towers (Spr Sky Towers Perambur Spr City); Kilpauk has Casagrand Dior (Casagrand Dior Kilpauk); and Mylapore and Adyar have Appaswamy Kamadhenu (Appaswamy Kamadhenu Mylapore) and Ramaniyam Anantiya (Ramaniyam Anantiya Adyar). Guides: Madhavaram, Chennai: Buyer's Guide 2026 — Prices, Rents, Metro Phase 2, Projects and Risks, Kilpauk, Chennai: Buyer's Guide 2026 — Prices, Metro Phase 2, Projects and Risks and Nungambakkam, Chennai: Buyer's Guide 2026 — Prices, Metro Phase 2, Projects and Risks

How to use the Purple Line in a purchase decision