Whatever the method of construction, if you are going to build a house you will always need planning permission.
For garden buildings planning permission is not required provided:

• - It is not closer to the road than your house
• - It does not cover more than half the area of the garden
• - It is not for use in connection with running a business
• - It is not more than 4m high
• - It is for the sole use of the house occupants
• - Your house is not a listed building

If you live in a Conservation Area, a National Park, an Area of Outstanding Natural Beauty, or the Broads additional limitations apply.

You should always check with your local planning authority in case any special local rules apply. Your local planning office will often operate a telephone help line so you can talk to the duty planning officer if you have any doubt about whether planning permission is required.

Buildings and other structures on the land around your house

Many kinds of buildings and structures can be built in your garden or on the land around your house without the need to apply for planning permission. These can include sheds, garages, reenhouses, accommodation for pets and domestic animals, summer houses, swimming pools, ponds, sauna cabins, enclosures (including tennis courts) and many other kinds of structure. But you will need to apply for planning permission if any of the following cases apply.
•You want to put up a building or structure which would be nearer to any highway than the nearest part of the “original ouse”, unless there would be at least 20 metres between the new building and any highway.
• More than half the area of land around the “original house” would be covered by additions or other uildings.The meaning of “original house” is explained in Section A.
• Your house is a listed building, and you want to put up a building or structure with a volume of more than 10 cubic metres.

The building or structure is not to be used for purposes ancillary to domestic use and is to be used instead, for example, for parking a commercial vehicle, running a business or for storing goods in onnection with a business.
• You want to put up a building or structure which is more than 3 metres high, or more than 4 metres high if it has a ridged roof. (Measure from the highest ground next to t.)
• You live in a Conservation Area, a National Park, an Area of Outstanding Natural Beauty, or the Broads, and you want to put up a building or structure with a volume of more than 10 cubic metres though it might be allowable as an extension).

Note: in all cases, if your new building would have a volume over 10 cubic metres and come within 5 metres of the house, you need to be aware that it could be treated as an extension (and its volume deducted) when calculating your entitlement to extend the house (see Section A).Also, if your new extension would bring some existing garden uilding within 5 metres of the (extended) house, that existing building’s volume could be deducted from your overall volume entitlement for the house, as if it were another extension. Ask your council if in doubt.