By Roelof van den Berg, CEO of Gap Infrastructure Corporation (GIC)
Public housing remains a national priority, with government consistently reinforcing its commitment to delivering safe, secure homes to historically disadvantaged communities. But to accelerate a new wave of large-scale housing delivery and trigger a public housing boom, cost and time efficiencies must be optimised through support from experienced partners in the private construction sector. By drawing on modern innovations, construction times could then be reduced from weeks to days – or even hours.
Many modern alternative construction methods exist to assist with this goal. For example, although building techniques such as 3D printing of homes have yet to be extensively tested and implemented in South Africa, they have proven to be highly effective in regions such as the United States of America (USA), Europe, and parts of Asia, where entire neighbourhoods have been built using this highly promising construction method.
South Africa itself has previously demonstrated the feasibility of 3D printing in construction on at least one occasion. Two years ago, the Department of Science and Innovation collaborated with the University of Johannesburg to successfully construct the country’s first 3D-printed home. Completed in just eight hours, the structure was proof of the speed and precision that emerging building technologies such as this can offer. But unfortunately, this innovative method has not been widely adopted since, leaving a compelling opportunity for implementation and innovation.
Using specially formulated concrete mixtures that dry rapidly, large-format 3D printers can produce housing shells with high accuracy and speed, guided entirely by digital blueprints. The challenge is that a high-capacity 3D printer has a substantial upfront cost, and that multiple printers are required for larger projects. That said, their productive potential is equally significant and could have outsized benefits over enough time.
By combining 3D design principles with more established alternative construction methods such as prefabrication and modular design, the idea is to build upon what already works, while strengthening delivery efforts by unlocking additional capacity and utilising more efficient systems and construction practices.
The benefits of speed and efficiency without sacrificing quality
Traditional brick-and-mortar methods remain a dependable foundation for much of the country’s public housing construction. However, other techniques such as modular building and prefabrication can also complement this approach by enabling faster build cycles, particularly where large numbers of similar units are required, like large-scale public housing developments in townships.
Modular design involves the off-site manufacturing of building components such as walls, roofs, and internal modules that are then transported to the site and assembled rapidly. Because much of the construction process occurs in a controlled environment, delays due to weather or site constraints are notably reduced. In many cases, the overall time from project commencement to handover can be cut by as much as 30% to 50%, while maintaining strict safety and quality standards.
Faster builds mean fewer disruptions to the surrounding community, less dust and noise, and shorter construction timelines. With proper planning, modular and prefabricated approaches also offer flexibility in design, allowing for adaptation to local conditions while retaining the structural integrity of the overall development.
The critical role of public-private partnerships (PPPs)
However, large-scale rollouts of new technologies require significant investment, equipment, and skilled labour, as well as effective frameworks that support cooperation, alternative financing, and long-term implementation stability. As an effective solution to this challenge, PPPs have already played a major role in major infrastructure projects across the country and can do the same for emerging housing technologies.
Through marrying public leadership with private sector investment, we can share the initial costs and risks while ensuring the benefits reach the intended communities. With this approach, private partners could co-invest in prefabrication facilities, mobile 3D-printing equipment, or modular panel factories, while government provides policy alignment, strategic oversight, and coordination across departments.
Government has laid a solid foundation for housing development in South Africa. Now, through partnership and innovation, we have the opportunity to take the next step, building faster, smarter, and at greater scale.
