We would always recommend that you contact your local council to find out the exact planning rules that apply to your house however we can provide the following general guidance:
The garden building must be less than 4m high with a pitched roof or 3m with a flat roof.
It should be 2 metres inside of your boundary, if not it is limited to 2.5m high and fire regulations will apply
The garden studio should be 5m from your home.
If you live on a corner plot the garden building will need to be further away from both roads than your house, otherwise you will need permission
If the buildilng exceeds 30metres sq it will be subject to building regulations
If the building contains any plumbing it will be subject to building regulations
The garden building should take up less than 50% of the garden surrounding the house
We are happy to help you provide the necessary information about your garden building for you to submit to your local planning officer to receive their advice on your individual project.