A garden studio is one of the most useful additions you can make to a family home: a quiet office, a gym, a creative space or a room for guests to relax in. One of the first questions we are asked is whether it needs planning permission. For most gardens the answer is no, but only if the building stays within a few clear limits.
Permitted development: the usual route
In England, many garden buildings fall under permitted development, which means you can build without applying for planning permission. As a general guide, a garden studio usually qualifies when it:
- is single storey and not used as somewhere to sleep or live independently
- sits behind the front of the house, not forward of the main elevation
- is no higher than 2.5 metres if it is within 2 metres of a boundary
- keeps eaves at 2.5 metres or less, with an overall height of up to 3 metres (or 4 metres with a dual-pitched roof) when further from the boundary
- does not cover more than half of the garden around the original house, together with other extensions and outbuildings
- has no veranda, balcony or raised platform higher than 30 centimetres
When you will need permission
Different rules apply to listed buildings, flats and maisonettes, and to homes in conservation areas, which are common across Cambridge. If the studio will be lived in or used as a bedroom, or if it is larger or taller than the limits above, you will normally need to apply. In those cases a well-prepared application is usually straightforward.
Building Regulations are a separate question
Planning permission is about what the building looks like and where it sits. Building Regulations are about how it is built. Small studios under 15 square metres generally do not need approval. Between 15 and 30 square metres they are usually exempt if there is no sleeping accommodation and the studio is at least 1 metre from a boundary or built mainly from non-combustible materials. Anything larger normally needs approval.
Our advice
Every garden is different, and the rules change from time to time, so always check the current guidance on the Planning Portal or with your local council. When we visit, we look at your garden, the access and how you want to use the space, and we will tell you plainly whether you are likely to need permission before you commit to anything.
Thinking about a studio of your own? See our garden studio options or ask us for a quote.
