Thane Borivali Tunnel Status: Borivali Shaft, TBM-03 and Progress

The Thane Borivali tunnel status has two very different stories in October 2026. The Thane half is in full production, with two of India’s largest hard-rock boring machines working under Sanjay Gandhi National Park. The Borivali half is only now getting its launch shaft ready. For homebuyers in Mumbai’s western suburbs, that second story matters more, because the Borivali end decides when the tunnel can actually open.

MMRDA’s project page puts physical progress at 13.73% through August 2026 and financial progress at 13.13% through July 2026. Both figures are modest for a project that is supposed to finish in May 2028. We at Godrej Properties MMR have broken down what has changed at the Borivali end, what TBM-03 means for the schedule, and how buyers in Kandivali East, Borivali East and Manpada should read it.

For the earlier history from groundbreaking to the first launch, see our full milestone tracker. This post focuses on the Borivali side.

The Borivali portal sits at Ekta Nagar in Magathane, Borivali East. Unlike Thane, where the machines started in April and August 2026, the Borivali end has spent most of 2026 on land and preparation. MMRDA lists three active work fronts there: a casting yard for tunnel lining segments, piling around the launch shaft, and excavation of the shaft itself.

The delay traces back to resettlement. In June 2025 MMRDA issued a rehabilitation plan for about 572 affected households around Magathane. Residents were given three options, including one-time monetary compensation. By February 2026, reports said over 500 structures had been cleared on the Borivali side. The last few families have been the final obstacle, and MMRDA moved to clear them during 2026.

That is why the Thane Borivali tunnel status reads so differently at each end. The physical rock at Borivali is no harder than at Thane. The difference is that work could not begin until the land was clear. Once the shaft is complete, the Borivali machines can start boring towards the Thane drives and close the gap from both sides.

“The Borivali shaft is now the single most important date on the project. Two machines from Thane cannot finish a 10.25 km twin tunnel on their own within the 2028 window.”

The contractor, Megha Engineering and Infrastructures Ltd (MEIL), is using a fleet of four tunnel boring machines, two for each end. Each one carries a cutter head of roughly 13.2 metres, making them among the largest single-shield hard-rock TBMs used in India. The tunnels will have an internal diameter of about 12.2 metres, enough for two running lanes plus an emergency lane in each tube.

TBM-03 passing its factory acceptance test on 29 May 2026 is a quiet but important step. It means the machine itself is not the constraint. The constraint is the shaft it will be lowered into. In Thane, the first machine was lowered in December 2025 and launched in April 2026, a gap of about four months for assembly and testing. If Borivali follows a similar pattern, a Borivali launch in the first half of 2027 looks realistic. That is our estimate, not an MMRDA date.

Work began in May 2023 on a 60-month contract, which is where May 2028 comes from. By October 2026, about 41 of those 60 months have passed, while physical progress stands at 13.73%. A June 2025 state review already referred to December 2028 as the completion date. Our team’s view is that a 2028-2029 window is the honest planning range, and our three completion scenarios lay out the reasoning in detail.

The good news is that tunnelling progress is not linear. Much of the early work, including land, shafts, casting yards and machine assembly, adds little to the percentage but unlocks fast progress later. Once four machines are boring at the same time, the headline figure can climb quickly. Our companion piece on the Thane Borivali tunnel current status today does the arithmetic on the pace required.

If you are buying near either portal, you do not need to follow every press release. These are the signals our team watches, in order of importance:

• Borivali shaft completion. The shaft must be finished before TBM-03 can be lowered.
• TBM-03 lowering and launch. This is the single biggest schedule milestone left before breakthrough.
• MMRDA’s monthly physical progress figure. A jump above 20% by mid-2027 would signal real acceleration.
• Any revised completion date in official statements. A formal shift from May 2028 to late 2028 or 2029 would reset price expectations.
• Toll notification. A reported Rs 200 car toll has not been notified; the final figure affects daily commute economics.
• Metro 4 opening. Passenger service on the Gaimukh-Cadbury Junction stretch is targeted for around Diwali or the end of 2026, which changes Thane-side access to the portal.

For buyers comparing the two sides of the park, our Thane Borivali tunnel map for commuters shows which daily trips actually change.

The Borivali end is where Godrej Properties Limited has its strongest tunnel-linked inventory. godrej reserve kandivali sits about 10 minutes from Magathane, with RERA possession in June 2030, which leaves a comfortable cushion even if the tunnel slips into 2029. Godrej Bliss Kandivali, with November 2029 possession, lines up closely with a 2028-2029 opening. On the Thane side, the upcoming Ghodbunder Road township sits beside the Manpada portal. The developer’s full portfolio is on the Godrej Properties Limited website.

Buyers who want exposure to infrastructure stories outside the tunnel can look at godrej city panvel, which sits in the Navi Mumbai airport catchment. Pune buyers often compare godrej infinity keshav nagar pune for ready homes, godrej emerald waters pimpri in Pimpri and godrej serene in Mamurdi. At the luxury end of Mumbai, sea-front projects such as Adani Bandra Reclamation and harbour-front ones such as L&T The Gateway Sewri show how much a single infrastructure link can move a micro-market.

Q: What is the Thane Borivali tunnel status in October 2026?

MMRDA reports 13.73% physical progress through August 2026. Two TBMs, Nayak and Arjuna, are boring from the Thane end. At the Borivali end, the casting yard, piling and launch shaft excavation are under way, and TBM-03 is ready for dispatch after passing factory tests.

Q: Why has the Borivali side not started boring yet?

Land had to be cleared first. MMRDA’s June 2025 plan covered about 572 households around Magathane. Over 500 structures were cleared by February 2026, with the last families relocated during 2026. Shaft work could only start after that.

Q: When will TBM-03 start boring from Borivali?

MMRDA has not announced a date. Based on the four-month gap between lowering and launch at Thane, our team estimates a Borivali launch in the first half of 2027, subject to the shaft being completed on time.

Q: Is the May 2028 completion date still realistic?

It remains the official target. A June 2025 state review referred to December 2028, and our team plans around a 2028-2029 window. Progress should accelerate once all four machines are boring.

Q: Who is building the Thane Borivali tunnel?

MMRDA is the implementing authority, and Megha Engineering and Infrastructures Ltd (MEIL) is the contractor. The project cost is commonly reported at about Rs 14,401 crore.

Q: How does the status affect property prices near Magathane?

Kandivali East averaged about Rs 30,950 per sq ft in September 2026. Most of the tunnel premium so far has shown up on the Thane side. A Borivali TBM launch is the kind of visible milestone that tends to pull the western-side premium forward.

The Thane Borivali tunnel status in October 2026 is a tale of two ends. Thane is boring with two machines, while Borivali is finishing its launch shaft with TBM-03 ready to go. The next six months at Magathane will decide whether May 2028 holds or the realistic window moves to 2029.

If you are planning a purchase near either portal, pick a possession date that works across 2028-2029. Our team can walk you through current inventory on both sides and arrange a site visit. For possession-timing advice, see our guide on the Borivali Thane tunnel completion date.