Buying a prefab home can seem like a simple and affordable way to create extra living space. Many advertisements focus on an attractive starting price, making the process appear straightforward.
However, the advertised price is not always the final cost.
Many buyers are surprised to discover that additional expenses can arise before their building is ready to use. These costs may include transport, foundations, site preparation, utility connections, permits, installation and other work required to suit their property.
A recent ABC News investigation highlighted why buyers should look beyond the advertised price when comparing prefab homes. The report followed one Australian homeowner’s experience and serves as a reminder that careful planning is essential before purchasing any prefab building.
You can read the original ABC News report here:
ABC News: Highlights the Hidden Costs of DIY Prefab Homes: What Australian Buyers Should Know
By Neve Brissenden, ABC News
What the ABC News Investigation Found
The ABC News report followed Bunbury homeowner Steve Harris, who purchased a $26,000 flat-pack tiny home after it was promoted as a DIY project that could be assembled in a weekend. His plan was to create a small salon for his wife’s home business.
Instead, the project became far more complicated than expected.
During the approval process, engineers identified components that did not meet Australian building standards, including glazing that failed to satisfy Australian safety requirements. According to the report, the building remained unpacked months after delivery while compliance issues were addressed.
The ABC also reported that once engineering changes, approvals and additional work were taken into account, the overall cost of the project could potentially double the original purchase price.
The investigation also included comments from Western Australia’s Consumer Protection Commissioner, who warned buyers to be cautious of claims such as “DIY” or “permit-free” homes. Even prefabricated buildings may still require council approvals, licensed electrical and plumbing work, and compliance with Australian building regulations.
The key takeaway is simple: the advertised purchase price is only one part of the total investment.
Why the Advertised Price Can Be Misleading
Most prefab homes are advertised with a base price because it provides buyers with a starting point for comparison. However, that figure may only cover the building itself.
Two homeowners can purchase exactly the same prefab home but end up paying very different total costs because every property presents its own challenges.
Factors that commonly affect the final project cost include:
- Site access
- Soil conditions
- Block size
- Existing services
- Council requirements
- Installation complexity
This is why comparing suppliers based only on the advertised starting price can sometimes create an unrealistic expectation of the total investment.
Transport
Delivery is one of the most commonly overlooked costs.
Transport pricing depends on factors such as:
- Distance from the factory
- Building size
- Road access
- Whether specialist transport vehicles are required
A home that is easy to deliver to one property may require additional planning and equipment on another site with narrow access or difficult terrain.
Foundations
Every prefab building requires a suitable foundation system.
The type of foundation depends on:
- Soil conditions
- Site slope
- Engineering requirements
- Building design
Some projects may use concrete slabs, while others are better suited to steel footings, adjustable stumps or screw piles. A proper site assessment helps determine the most appropriate solution before construction begins.
Site Preparation
Before installation can begin, the site often requires preparation.
This may include:
- Levelling the ground
- Improving drainage
- Removing vegetation or existing structures
- Creating access for delivery vehicles or cranes
A level block with good access may require very little preparation, while more challenging sites can involve considerably more work.
Utility Connections
If the prefab building includes a bathroom, laundry or kitchenette, it will require connections to essential services.
These can include:
- Electricity
- Water
- Sewer
- Stormwater
- Internet
The further the building is from existing services, the higher these connection costs may become.
Council Approvals and Permits
Approval requirements vary depending on where you live, the size of the building and how it will be used.
Some projects may require:
- Building permits
- Planning permits
- Engineering documentation
- Energy assessments
- Other compliance certificates
The ABC investigation highlighted that buyers should be cautious of products promoted as “permit-free.” In many situations, approvals are still required before installation can proceed.
Before committing to any supplier, ask who is responsible for managing approvals and exactly what is included in the quoted price.
Crane Hire and Installation
Some prefab homes can be installed without heavy lifting equipment, while others require cranes.
Whether crane hire is necessary depends on:
- Building size
- Delivery method
- Property access
- Installation location
Always confirm whether installation costs and crane hire are included in your quotation.
Lessons for Anyone Buying a Prefab Home
The ABC News investigation doesn’t suggest that prefab homes are a poor investment. Prefabricated construction continues to grow across Australia because it can offer faster construction, high-quality manufacturing and a more efficient building process than many traditional builds.
The important lesson is to understand the complete project—not just the advertised purchase price.
Before signing a contract, ask your supplier:
- Is the building designed to comply with Australian building standards?
- What exactly is included in the quoted price?
- Who manages permits and council approvals?
- Are transport and installation included?
- What type of foundation will be required?
- Will licensed trades be needed for plumbing and electrical work?
- Are there any likely site-specific costs?
Getting clear answers upfront can help you compare suppliers more accurately and reduce the risk of unexpected expenses later.
