Why Hasn't Factory-Built Housing Delivered?

THE SHELTER JOURNAL  |  NO. 002

Why housing is still unaffordable.

For more than half a century, prefabricated and modular housing has promised to change the way we build homes.

For decades, governments, industry and researchers have searched for a better way to build homes. The challenge has become increasingly urgent.

Housing affordability continues to decline.

Construction productivity remains stubbornly low.

Labour shortages continue.

Governments continue searching for ways to increase housing supply.

In 2025, the Productivity Commission highlighted the scale of the problem:

"The number of dwellings completed per hour worked by housing construction workers has declined by 53% over the past 30 years."

Productivity CommissionHousing Construction Productivity: Can We Fix It? (2025)

If the way we build houses has become less productive over time, perhaps it is not surprising that housing has become increasingly unaffordable.

For more than half a century, one of the industry's answers has been prefabricated and modular housing.

The promise was remarkably simple.

Lower cost.

Higher quality.

Faster delivery.

The holy trinity of manufacturing.

It is the formula that transformed the automotive industry.

It transformed aviation.

It transformed consumer electronics.

It transformed almost every manufactured product we use every day.

As factories improved productivity, products became better while becoming more affordable.

That is the promise of industrialisation.

Housing was expected to follow the same path.

Yet, despite decades of development, that promise is yet to be realised.

Today, Australia has an established modular housing industry. Modern factories use digital design, CNC machinery and engineered production systems to manufacture homes and remote accommodation.

So why hasn't factory manufacturing transformed housing in the same way it transformed almost every other industry?

Walk through almost any modular housing factory today.

What do you see?

Not automotive production lines.

Not aircraft assembly.

Not highly automated manufacturing.

Instead, you'll often see something remarkably familiar.

Carpenters framing walls.

Electricians installing wiring.

Plumbers fitting pipework.

Plasterers lining walls.

Cabinet makers installing kitchens.

Painters.

Floor layers.

Trade follows trade.

One activity follows another.

The weather has changed.

The roof has changed.

But the underlying production methodology has changed far less.

The building site has simply moved indoors.

That observation is not criticism.

Factory-built housing has undoubtedly improved workplace safety..

But improving the environment in which construction occurs is not the same as reinventing the manufacturing process itself.

The promise of industrialisation was never simply to build indoors.

The promise was to fundamentally change the economics of housing.

There is another influence quietly shaping factory-built housing.

The truck.

Every completed building must leave the factory.

Its width.

Its height.

Its weight.

Its lifting points.

Its transport route.

Its bridge clearances.

Its escort requirements.

Long before a family walks through the front door, the road network has already influenced the architecture.

Module widths.

Roof forms.

Structural design.

Room layouts.

With or without intending to, the dimensions of the truck became the architect.

Perhaps this is the more important question.

If factories transformed the economics of almost every other industry...

Why hasn't factory-built housing yet transformed the economics of housing?

What do you think?

Has factory-built housing fulfilled its promise of lower cost, higher quality and faster delivery?

Or is the industry still searching for the manufacturing breakthrough that transformed almost every other industry?

About The Shelter Journal

The Shelter Journal explores housing, resilience, architecture, manufacturing and the future of shelter. Published by Diamond Weave, it is an open invitation to question how we build and how better shelter might be made available to more people.