You will need planning permission for:

• Containers with capacity greater than 3,500 litres
• Structures forward of the principal elevation of the house
• Structures higher than four metres to the ridge line
• Structures to the side of the house
• Verandas and balconies
• Raised platforms more than 300mm high

Other development may be permitted development if the following conditions are met:

• Dual-pitched structures, such as a building with a gable-ended roof, must not exceed four metres high
• Structures within two metres of boundary must not exceed 2.5 metres high
• Other structures must not exceed three metres high
• Eaves heights must not exceed 2.5 metres high
• Curtilage structures greater than 10 square metres and more than 20 metres from any wall of the house will exclude further permitted development under this class
• Total ground area covered by structures in curtilage must not exceed 50 per cent of curtilage area (excluding house area)