Operating as a diversified infrastructure company across India, Tantia Constructions Limited specializes in the development, enhancement, and upkeep of various transportation networks. This includes extensive road infrastructure projects such as highways, bridges, and flyovers, alongside comprehensive railway systems. For railways, their services encompass everything from initial planning and track installation (including advanced welding techniques) to steel structure fabrication and the construction of critical facilities like stations, terminals, bridges, tunnels, and light rail/mass transit systems. The company also undertakes Build-Operate-Transfer (BOT) and similar concession models, in addition to providing signaling, electrification, and ongoing rail maintenance services. Beyond transport, Tantia offers a broad spectrum of urban infrastructure solutions, ranging from large-scale land development, earthmoving, and ground engineering to the installation of associated utilities such as roads, pipelines, and electrical/lighting systems for residential, commercial, and public buildings. Their expertise further extends to aviation infrastructure (e.g., terminal buildings, control systems), marine projects, and power transmission networks (covering foundations, tower erection, and cable stringing). Completing its offerings, the company manufactures and supplies ready-mix and dry-mix concrete and mortar products. Established in 1964 and headquartered in Kolkata, India, Tantia Constructions Limited operates as a subsidiary of Nigolice Trading Private Limited.