Tiny houses are popular, but in the UK they sit in a grey area between caravans, buildings and sheds. Short answer: a tiny house on wheels may legally be a caravan, but that does not mean you can put one on a field and live in it. Where you put it and how you use it decides whether you need planning permission, and living in one almost always does.
Is a tiny house a caravan or a building?
Under the Caravan Sites Act 1968, a structure designed to be moved, within the size limits (commonly quoted as 20 m long, 6.8 m wide and 3.05 m internal height), can count as a caravan. Tiny houses on a trailer often fit. Tiny houses on foundations, or too large to be moved as a caravan, are treated as buildings and need building regulations approval and planning scrutiny.
Do I need planning permission for a tiny house?
Usually yes if you live in it as a home. Wheels do not decide the question. Planning looks at the use of the land. A tiny house lived in as a main home on land without residential permission is a change of use.
Where can a tiny house go?
- In the garden of an existing home: often the simplest route, as a home office or ancillary space, but not as a separate dwelling without permission.
- On a licensed caravan or park home site: designed for this, with site rules and pitch fees.
- On land with planning permission: where the council has approved residential use, sometimes conditionally or for a limited period.
- As part of a One Planet Development in Wales or a rural scheme: possible but evidence-heavy. See One Planet Development explained.
Building regulations and safety
A caravan is not subject to building regulations, but a fixed building is. Even when regulations do not apply, sensible safety still does: gas safety, electrical safety, fire escape, ventilation and insulation. If you build your own, ask the local authority building control what applies.
What do tiny houses really cost?
Costs vary widely, and any single figure would be misleading. Plan around these buckets, then replace guesses with real quotes:
- Build or purchase price (self-build or manufacturer).
- Transport and siting.
- Land, pitch fee or rent.
- Power, water and waste solutions.
- Insurance, which can be specialist.
- Planning fees and professional advice.
Our Off-Grid Budget & Cost Planner is built for exactly this: separating set-up costs from running costs and comparing low, working and high scenarios.
Mortgages, insurance and resale
Standard mortgages rarely cover a caravan-style tiny house, so most are funded with savings or a personal loan. Insurance is available from specialist providers. Resale can be harder if there is no permanent pitch or planning status. Read our guide to off grid mortgages.
FAQ
Are tiny houses legal in the UK? Yes, but living in one needs the right land use permission.
Can I put a tiny house on my own land? You can own land, but residential use usually needs planning permission.
Can I live in a tiny house in my garden? Some ancillary uses are possible; a separate home usually needs consent.
Sources
General information for the UK, not legal or professional advice. Rules differ between nations and change over time; check with your local planning authority and a qualified professional before acting. Last checked: September 2026.
