The funding will grow Monumental’s world-class team of hardware and software engineers, scale the number of robots it can deploy across Europe and the UK, deepen its UK presence, expand the range of construction tasks the robots can handle, and fund its expansion into the US.

Britain does not have the people it needs to build. To hit the UK government’s target of 1.5 million new homes, the Home Builders Federation estimates the country needs at least 20,000 more bricklayers, yet only around 1,990 completed apprenticeships in 2024. Monumental is closing that gap with a fleet of more than 150 robots already working as an autonomous subcontractor on real job sites.

“The world simply does not have enough people to build what it needs, and that shortage will not be solved by another app or another robot doing backflips on stage,” said Salar al Khafaji, co-founder and CEO, Monumental.

“It takes machines that turn up on site and lay real brick all day, to spec, which is what our fleet already does today. Every robot we deploy expands the industry’s capacity to build, bringing a future of beautiful, affordable, bespoke buildings and infrastructure closer to reality. Khosla’s investment lets us put many more of them to work in more countries while expanding beyond bricklaying.”

Monumental’s electric, autonomous robots use advanced sensors, computer vision, and cranes to lay brick and mortar with millimetre precision, operated by its AI platform, Atrium. Having already built the walls of more than 100 homes across the Netherlands and the UK, along with a school, a community centre, a hotel, and canal walls, Monumental has proved that autonomous construction works. The pace is accelerating fast, with nearly half of those homes built in the past three months alone, up from just eight the quarter before.

Sten Tamkivi, partner at Plural, said: “Since our first investment, Monumental has become one of the most deployed autonomous construction operators in the world, solving a global-scale problem from the heart of Europe. That’s not a coincidence - it’s the result of the right team with the right approach to finally close the gaps, not just plaster over them.” 

Contractors engage Monumental as a subcontractor and pay for finished wall rather than buying machines, which removes the financial and technical risk of owning and operating equipment. The model is outcome-priced and forward-deployed, so customers pay for the wall that gets built. Salar al Khafaji and Sebastiaan Visser previously built Silk, acquired by Palantir in 2016, and Monumental was the first company to bring Palantir’s forward-deployed engineering model to robotics, years before the rest of the industry caught on.