Do you need planning permission for a garden sauna?

It's the question we're asked most, so here's a clear answer for UK homeowners.

The short answer: in England, most garden saunas don't need planning permission. They're treated as outbuildings under "permitted development", as long as they stay within set size, height and position limits. You're likely to need permission if your home is a listed building, a flat or maisonette, or if you want to put the sauna forward of the front of your house. Rules differ in Scotland, Wales and Northern Ireland, so always check with your local planning authority.

Permitted development limits for outbuildings in England

A garden sauna is usually permitted development if all of these apply:

• It isn't on land forward of the wall forming the principal elevation (usually the front) of the house.
• It's a single storey, with eaves no higher than 2.5 metres.
• It's no taller than 4 metres with a dual-pitched roof, or 3 metres with any other roof.
• If it's within 2 metres of a boundary, it's no taller than 2.5 metres in total.
• Together with other buildings and extensions, it doesn't cover more than half the land around the original house.
• It has no verandas, balconies or raised platforms over 30cm high.

For example, Solen stands 216cm tall, so it sits under the 2.5-metre limit even when placed close to a boundary.

When you'll probably need planning permission

• Listed buildings: any outbuilding within the grounds of a listed building needs permission.
• Flats and maisonettes: permitted development rights for outbuildings apply to houses, not flats or maisonettes.
• Designated land: in conservation areas, National Parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites, outbuildings to the side of the house need permission, and larger outbuildings far from the house are restricted.
• Removed rights: some homes, often on newer estates, have had permitted development rights removed by a planning condition or an "Article 4 direction". Your council can tell you.

Do you need building regulations approval?

Usually not for a garden sauna. A detached outbuilding with a floor area under 15 square metres and no sleeping accommodation doesn't normally need building regulations approval. Between 15 and 30 square metres, it's normally exempt if it has no sleeping accommodation and is either at least 1 metre from any boundary or built substantially of non-combustible materials. Most home saunas are well under 15 square metres.

The electrics are different. The heater must be connected by a qualified electrician. In England and Wales, a new circuit is normally notifiable under the Building Regulations, which a registered electrician can self-certify for you.

Scotland, Wales and Northern Ireland

Each nation has its own planning rules. They're broadly similar, but the limits aren't identical. Check your local council's guidance before you order.

How to be certain

If you'd like formal confirmation that your sauna is permitted development, you can apply to your council for a Lawful Development Certificate. It isn't compulsory, but it's useful if you're unsure, or if you'll sell your home in future.

Before you order

Planning is only one part of getting your garden ready. Space, base, power and access matter just as much. Take our one-minute "Is my garden sauna-ready?" check, or read our garden sauna buying guide.

This guide summarises the general rules for England, based on the Planning Portal's guidance. It isn't legal advice. Always check with your local planning authority.