The Deposit Problem in Factory-Built Housing

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Why Treating Homes Like “Products” Leaves Homeowners Unprotected

California has some of the strongest consumer protection laws in the country when it comes to residential construction. And yet, a growing number of homeowners pursuing ADUs and factory-built housing are finding themselves financially exposed — sometimes losing tens of thousands of dollars with little recourse.

This isn’t happening because homeowners are careless. It’s happening because the law has not kept pace with modern housing delivery models.

The $1,000 Deposit Rule — and Where It Breaks Down

Under California law, contractors performing home improvement work are generally limited to collecting no more than $1,000 or 10% of the contract price (whichever is less) as an upfront deposit. This rule exists for a reason: to prevent homeowners from handing over large sums of money before meaningful work has been performed.
When this law applies, it works.

The problem is that factory-built, modular, prefab, and ADU projects often fall into a legal gray area — sometimes treated as…

• product purchases,
• manufacturing agreements,
• or hybrid design-build contracts,

…rather than as housing or real estate transactions.

Which category applies often depends not on the lived reality of the project, but on how the contract is written.

Factory-Built Housing Is Treated Like a Product — But Lives Like Real Estate

On paper, factory-built housing is frequently treated as a product — something manufactured off-site, purchased through a sales or production agreement, and paid for upfront.

But once that “product” is delivered and installed, it becomes real property.

• It is permanently affixed to land.
• It requires permits, inspections, and a Certificate of Occupancy.
• It affects property value, financing, taxes, insurance, and inheritance.

In every meaningful way, it functions as real estate, not a consumer good.
Yet the protections that normally accompany real estate transactions — such as regulated escrow, milestone-based fund release, and professional errors-and-omissions insurance — often do not apply at the point when homeowners are most financially exposed.

This mismatch creates a dangerous gap: homeowners are asked to pay for housing as if they are buying a product, while assuming the risks of a real estate development — without the safeguards that typically protect buyers in real estate transactions.

If factory-built homes ultimately become real estate — and they do — then consumer protections should reflect that reality. (Please refer to the chart below to view the differences of Factory Built Housing vs. Real Estate)
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The Gap Bad Actors Exploit

In this gray zone, some contractors structure agreements to bypass deposit limits by separating:

• “unit purchase” contracts,
• factory production agreements,
• consulting or design contracts,and site work agreements.

This can allow large upfront deposits to be collected without:

• escrow protection,
• milestone verification,
• or independent oversight

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Once funds are deposited directly into operating accounts, homeowners assume nearly all the risk. If a contractor stalls, closes, or fails to perform, homeowners often become unsecured creditors with limited options for recovery.

This is not theoretical. It is happening repeatedly — and predictably.

There Is No Deposit Insurance for Housing Construction

• Unlike banks, construction deposits are not insured.
• Unlike real estate transactions, escrow is often optional or absent.
• Unlike other consumer industries, there is no automatic backstop when contractors fail.

For homeowners using life savings, retirement funds, or home equity to build ADUs, the consequences of this gap are devastating. This Is a System Failure — Not a Homeowner Failure. 

Homeowners reasonably assume:

• Licensing equals protection
• Permits equal progress
• Deposit requests equal standard practice

But in factory-built housing, those assumptions are often unsupported by enforceable safeguards.

Good contractors are harmed by this too. When standards are unclear, bad actors operate longer — eroding trust across the entire industry.

In a world of Housing Crisis this MUST CHANGE

• Homes are not startups.
• Housing is not a speculative product.
• Failure should not be normalized when homeowners carry all the downside.

If California and other states want to expand ADUs and innovative housing solutions, they must modernize consumer protections to reflect how housing is actually delivered today.
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That means:

• Clear deposit rules that apply to factory-built housing
• Required third-party escrow for large deposits
• Payments tied to verified milestones
• Professional insurance standards similar to real estate
• Real consequences for non-performance

​Housing innovation without consumer protection isn’t progress. It’s risk transfer.
Homeowners must demand stronger structures — and policymakers must act.

Be Well, 
Lindsay Wood
Tiny Home Lady®