The Indian government is planning to introduce 3D concrete printing technology in public housing projects, aiming to address the country's housing shortage. At least three demonstration projects will be launched under the Pradhan Mantri Awas Yojana-Urban (PMAY-U) 2.0, with each project comprising a cluster of around 20 houses.
The projects will be undertaken in Goa, Nagpur, and Thiruvananthapuram, among other locations, marking the first use of 3D concrete printing in India's urban public housing sector. The technology has gained traction globally, with countries like Malawi, Mexico, and the UAE adopting it in their construction sectors.
However, experts say cost remains a major hurdle, with 3D-printed construction currently costing around ₹4,000 per sq ft, compared to ₹2,000 per sq ft for conventional construction. Another limitation is its inability to support high-rise construction, which limits its applicability in large cities.
Despite these challenges, researchers are working to address the technology's drawbacks. Recent innovations have substituted cement with industrial and agricultural waste materials, reducing construction costs and the carbon footprint. The technology is also being explored for its potential in rural housing programmes, where people prefer single-storey or two-storey homes.
However, regulatory uncertainty may prove a bigger obstacle than engineering challenges. India lacks a dedicated regulatory framework for 3D-printed buildings, and existing provisions in the National Building Code and Indian Standards do not fully address the material behaviour and load-transfer mechanisms unique to printed structures.
