Mumbai Metro Line 4 (Ghodbunder Road to Wadala): Construction Update

As of September 2026, the first Thane stretch of Metro Line 4 is in its final safety stage. This 10.5-km section from Gaimukh to Cadbury Junction cleared RDSO checks in June 2026. Its trains then got safety clearance in August 2026. MMRDA targets its opening around Diwali or by the end of 2026. The rest of the line to Wadala is due in stages through 2027.
With its 4A extension, Metro Line 4 will run about 35 km from Gaimukh to Wadala. Below, you will find the full timeline, station list, costs and what the line means for Thane West.