Can I build my tiny house on wheels (THOW) on an old caravan chassis?

Unfortunately, building a tiny house on an old caravan chassis is unlikely to be a successful tiny house project. Caravan chassis are rated to low weight limits, because caravans are designed to be towed behind family vehicles with low tow limits. Look for a compliance plate on your caravan chassis and find the ATM (Aggregate Trailer Mass).

That weight is the limit of what your overall weight of the completed tiny house needs to weigh. Caravan chassis ATMs will typically be below 3000kgs which is a difficult weight limit to achieve when building a tiny house out of traditional building materials like wood, steel and house cladding. Caravans are built out of plastic products and sealed with glue and rubber to stay lightweight, which is not what a tiny house on wheels is able to match in terms of weight.