The promise of factory efficiency in prefab housing is often erased by new costs. Modules must be over-engineered to survive road transport—a primary design constraint—and then require complex, costly on-site work to connect, negating initial savings.

To overcome the construction industry's conservatism, Monumental operates as a subcontractor. This model is easier to sell than a large capital expenditure like a robot, as it fits existing project budgets and workflows, de-risking adoption for general contractors.

The collapse of Katerra, which burned through $2-3 billion in VC funding, shows that simply applying factory models to construction is not enough. The startup's failure highlights that deep, systemic issues like logistics, regulation, and on-site complexity cannot be solved by capital alone.

To solve ill-fitting double-wide mobile homes, Clayton Homes innovated its manufacturing. Instead of building two halves separately and hoping they'd align, they built the entire home as a single unit, then sawed it in half for transport, ensuring a perfect reassembly on site.

Unlike lightweight goods, heavy housing modules are uneconomical to ship more than a day's drive. This physical constraint prevents the creation of massive, centralized factories, forcing a model of smaller, distributed plants that cannot achieve the same economies of scale.

The housing industry is resistant to startup disruption due to immense "activation energy." This includes hyper-local regulations, fragmented distribution, cyclical capital needs, and a complex web of legacy players. Overcoming this barrier requires decades of effort, creating a powerful moat for incumbents.

Construction projects have limited upside (e.g., 10-15% under budget) but massive downside (100-300%+ over budget). This skewed risk profile rationally incentivizes builders to stick with predictable, traditional methods rather than adopt new technologies that could lead to catastrophic overruns.

Contrary to most industries that see technological gains, housing construction has become less efficient. This stagnation is a key, often overlooked driver of housing affordability issues, as the fundamental cost to build has not decreased with technology.

The Netherlands was an ideal starting market due to high construction density (short travel to pilot sites) and a single, nationwide building code. This homogeneity simplified product development and testing, unlike fragmented markets like the US or Germany, accelerating learning loops.