Small garden room ideas
The short answer
In a small garden, the planning rule that at least 25 m² of garden must remain sets your limit. A 6 × 6 m back garden (36 m²) allows a garden room of up to 11 m². Rooms of 6 to 12 m² work well as offices or studios with built-in storage, a glazed front and furniture placed along the walls.
On this page
How big can you go?
| Rear and side garden | Largest exempt garden room |
|---|---|
| 30 m² (for example 6 × 5 m) | 5 m² |
| 36 m² (6 × 6 m) | 11 m² |
| 42 m² (7 × 6 m) | 17 m² |
| 50 m² (10 × 5 m) | 25 m² |
| 55 m² or more | 30 m² |
Remember to subtract any existing shed from the 30 m² total too.
See what fits your garden
Enter your garden's width and depth to see the largest exempt garden room, drawn to scale.
Three small layouts
Drawn to scale on a 1 m grid.
3 × 2 m: a compact studio
Room for one desk along the back wall and tall shelving in the corner. Good for writing, painting or a music practice room.
3 × 3 m: a one-person office
The desk faces a side wall to avoid glare from the doors, with an armchair for breaks or calls.
4 × 3 m: office and fitness
A desk at one end and an exercise bike or yoga mat at the other, with storage to clear the floor.
Ideas that make a small room work
- Full-height glazing on one side makes the room feel larger and connects it to the garden.
- A higher ceiling, within the 3 m height limit for flat roofs, adds a sense of space.
- Built-in storage under the desk or across the back wall keeps the floor clear.
- Sliding doors don't need space to swing open.
- Light colours inside and one consistent floor finish.
- A fold-down wall desk frees the floor when the room doubles as a gym or playroom.
Where to put it
- At the end of the garden, keeping open space near the house where you use it most.
- In a corner, so two sides back onto boundaries and the rest of the garden stays open.
- Facing the house or the sun, depending on whether you want light or privacy.
- Leave room behind to maintain walls and gutters, and check access for delivery through the side passage.
Common questions
Can you put a garden room in a small garden?
Yes, but the 25 m² open space rule limits the size. Measure the garden behind and beside the house, take away 25 m², and the result is the largest garden room you can build without planning permission.
What is the smallest useful garden room?
Around 6 to 7 m² works for a single desk or a compact studio. Below that it is closer to a shed.
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