Dutch robot builder Monumental raises $32m to plug UK labour gap
Amsterdam-based Monumental has raised $32 million to deploy its bricklaying robots across Europe and the US, offering a rare outcome-based model to address a severe construction labour shortage that has left Britain with the second-worst housing density on the continent.
Amsterdam robotics company Monumental has closed a $32 million Series B round led by Khosla Ventures to expand its fleet of bricklaying machines. Existing backers Plural and Hummingbird also participated, following their $25 million investment earlier in 2024. The capital will fund an expansion across Europe, a deeper push into the UK market, and a first launch in the United States this year.
The company operates more than 150 fully electric robots on active building sites rather than in test environments. Using sensors, computer vision, and a small crane arm, the machines have completed the walls of over 100 homes in the Netherlands and the UK, alongside a school, a hotel, and a stretch of Amsterdam canal wall. Nearly half of those homes were built in the last three months alone, up from just eight in the previous quarter.
Monumental does not sell its hardware to builders. Instead, it works as a subcontractor charging contractors for finished walls, absorbing the costs and risks of owning and maintaining the machines itself. This outcome-priced model sidesteps a major barrier in the construction industry, where robotics firms have traditionally struggled to sell expensive equipment to contractors lacking the capital or appetite to operate it.
The immediate target for this expansion is the UK, where a severe shortage of manual labour is stalling housing construction. The British government wants to build 1.5 million new homes, but the Home Builders Federation estimates a shortfall of 20,000 to 25,000 bricklayers. With only 1,990 bricklaying apprenticeships completed in 2024, conventional recruitment cannot close the gap.
Britain's housing deficit reflects a wider European crisis in construction productivity. According to the Centre for Policy Studies, the UK has just 446 dwellings per 1,000 people, ranking second worst in Europe behind a continental average of 542. Stagnant building methods have made addressing this shortage both slow and expensive.
Khosla Ventures' lead investment signals confidence that applied robotics can break this logjam. “Construction costs have exploded while the industry itself has barely changed in decades,” said Vinod Khosla. “We know how to build, we’ve just made it too expensive and too slow.”
Monumental’s founders, Salar al Khafaji and Sebastiaan Visser, previously sold a data-visualisation startup to Palantir and have adopted a similar forward-deployed engineering approach, keeping staff on-site alongside customers. “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 al Khafaji. “It takes machines that turn up on site and lay real brick all day, to spec.”
The company is part of a growing cohort of European startups targeting the construction labour gap, such as All3, which recently raised $25 million for legged housebuilding robots. Because it retains ownership of its machines, Monumental's growth is constrained primarily by its manufacturing capacity and its ability to hire staff, rather than by buyer hesitation. The new funding will also be used to teach the robots additional construction trades beyond bricklaying.
