Why owning a tiny home on wheels can be a legal nightmare

Sunday, 5 July 2026

There are estimated to be thousands of tiny houses on wheels in New Zealand, but achieving complete legal compliance to live in them permanently is difficult.

They sit in a legislative grey area; if classified as a dwelling on a trailer foundation, there is no nationally recognised pathway to achieve full Building Code compliance.

Tiny home advocate Karen Flett has presented a four-objective solution to Parliament.

ACT MP and builder Cameron Luxton hosted the presentation and has vowed to push for legislative changes so that tiny home owners no longer “fall through the cracks”.

It’s a simple and alluring idea - buy a comfy, warm and mobile little home, park it somewhere nice and live the good life.

In a time of low housing affordability and a cost of living squeeze, a tiny home on wheels - a trailer - would seem a logical option for many.

But anyone who owns or is thinking about buying one, should be aware of the veritable morass of laws, regulations and potential pitfalls that need to be contended with.

Countless disputes between tiny home owners and councils are testament to this.

This has been the case for many years, says Karen Flett, who’s dealt with many who bought into the dream, only to have it dashed.

The tiny homes on wheels advocate is an award-winning tiny home designer, an author and recently completed a master's degree in architecture.

Her master’s thesis examined the challenges facing tiny homes on wheels and proposed solutions that could change everything.

Last month she presented it at Parliament at the invitation of ACT MP Cameron Luxton, a licensed building practitioner and builder who is familiar with the issues.

So, what’s the problem?

“The issue really is that tiny homes on wheels are being lived in throughout the country but they don’t actually offer the same housing security as a conventional dwelling because they’re not specifically recognised within a clear, nationally consistent legislative framework,” says Flett.

“They sit in this really fuzzy grey area that councils, homeowners and landowners all look at and think ‘we want these to work but we don’t know where the legislation tells us to put tiny houses’, and therefore they’re often dealt with on a case-by-case basis,” she says.

“When a tiny home on wheels is approached as a load on a trailer it may be seen as a vehicle, but can also be defined as a building and required to meet the building code.

“As various court cases and MBIE determinations have considered, whether a tiny home on wheels is a vehicle or a building depends on many factors such as its moveability and how connected it is to the land, and the answer is not always straightforward.

“Then, even if a tiny home on wheels is defined as a vehicle and not a building, the RMA and district plans can still regard it as a dwelling because somebody is living in it…,” Flett says.

In that case, it would need to achieve Building Code compliance but the code has no compliance pathway that “specifically addresses a trailer-based foundation system”.

That means that if a tiny home is being used as a dwelling and it’s on a trailer it can’t be compliant.

“So it's kind of stuck in a circle of never being able to get complete certainty, given there is no clear nationally consistent pathway,” says Flett.

Everything is fine until a neighbour complains

There’s no way of knowing exactly how many tiny homes on wheels there are in New Zealand, but there are certainly thousands, possibly more than 10,000.

Often, they are high-quality homes built to meet Building Code performance standards. Their owners work hard to respect the rules, manage services appropriately and site them responsibly. They sit quietly as safe, affordable homes, causing little impact on neighbours or the wider community.

Everything is fine - until that one neighbour pops their nose over the fence and complains.

“As soon as there’s a complaint, the council has to act,” says Flett.

And that’s when uncertainty floods in: Can you remain where you are? Are additional approvals required? Must you relocate?

Adding further confusion, different councils take different approaches. What might be acceptable in one district will not necessarily be so in another.

Flett says there’s a dearth of education around the laws.

“There’s a lot of people signing up to tiny homes, buying tiny homes and not being told the full story about what they’re getting themselves into…

“It breaks my heart seeing people invest significant money into what they believe will be a secure housing solution, only to discover the regulatory framework doesn't provide the certainty they expected,” Flett says.

She recently received an email from a man who had to “employ a lawyer and pay a substantial cost just to justify why his tiny home on wheels should be allowed on a property,” Flett says.

“Fortunately he was someone who had the money, but many don’t.”

She knows another person who has spent three years “going round in circles with neighbours and council”.

“It’s been extremely stressful for her, not knowing if she can actually live in her house, or where she needs to move to.”

So, what’s the fix?

Well, there are four solutions outlined in detail in Flett’s paper.

The first concerns the house and how it can meet Building Code requirements through a combination of existing Acceptable Solutions and Alternative Solutions.

Acceptable Solutions are step-by-step compliance pathways published by MBIE that, if followed, must be accepted by a council. Alternative Solutions are ways of demonstrating compliance through engineering advice, expert opinion, previous determinations, testing or other evidence.

Combining these into a nationwide tiny home on wheels Acceptable Solution approved by MBIE is a key part of the puzzle, says Flett.

That could give tiny homes on wheels a similar status to other specialised buildings with compliance pathways tailored to their unique circumstances - for example DoC Huts.

The second objective is the trailer.

“It obviously needs to work on the road but also has to work as a foundation system. To do that we need to look at how an engineered trailer system could be CodeMark certified via BRANZ and recognised as part of the tiny house on wheels Acceptable Solution,” says Flett.

The third objective is the site.

This is essentially the relationship between the tiny home on wheels and the land it sits on, including accessing services or disposing of waste.

Solutions such as composting or incinerator toilets are examples of ways to manage toilet waste, while separate systems can address greywater, enabling the Building Code performance requirements to be met and incorporated into the Acceptable Solution, says Flett.

The last objective is to address the requirements of the Resource Management Act and district plans. Tiny homes on wheels can be formally recognised as dwellings so they can be treated in a similar fashion to standard houses or granny flats.

“This also includes how councils could apply development contributions and rates associated to a movable dwelling. One suggestion is a nationwide registration system administered through NZTA, where a trailer could be registered as a tiny home on wheels and contribute through a registration mechanism,” says Flett.

Where to next?

“We need to create a cross-ministry programme of work developing terms of reference, headed by industry experts with support and guidance from ministers and ministries,” says Flett.

That would look to bring the key requirements from each ministry into a framework that provides councils, homeowners, builders and landowners a clear and nationally consistent approach.

“It’s largely about putting a bunch of jigsaw pieces together, not redefining legislation or creating loopholes,” says Flett.

There would be a cost to putting this legislative jigsaw puzzle together, and Flett suggests funding could come through the existing building levy, which is already distributed to MBIE and BRANZ - two of the key agencies that would be involved in this work.

Luxton was impressed with Flett’s presentation and suggestions.

“This is a choice of living that is like a square peg with the round hole of our construction legislation. There’s a lot of New Zealanders choosing this as their home option and they shouldn’t be falling through the cracks,” he said.

Luxton said Flett’s work showed how tiny homes on wheels could “comply with the Building Act, the planning laws and the Transport Act”.

“If I’m privileged enough to be part of the next ACT Party as part of a coalition government, I will be pushing for this to be addressed.

“It needs attention,” he said. “Karen’s laid out the work. It’s quite clear what needs to be done.”