Will you need planning permission ? Generally no, as the building is classed as a 'Portable Building', however it is your responsibility to check with your local planning office. Notable exceptions to the above are listed buildings and conservation areas. It may be that you need to position the building a certain distance from the house, or boundaries, but each area is different, so we're afraid we cannot offer accurate information. Other general guidelines are that it must not take up more than ½ your garden, it must be behind the building line, it should be 1 metre away from the boundary (although most buildings tend to be nearer than this), it should be less than 4 metres high (if it is an apex building) and should be 50 ft away from the nearest road. Check your phone book for your local council and ask to speak to a 'planning officer' to get the exact advice.Guidelines from 1st Octber 2008
Another thing to keep in mind, is your neighbours reaction - always keep them informed of what's happening, and be prepared to alter the plans you had for locating the building if they object - it's better in the long run, believe me!
If you are in any doubt, you can get guidance on the government planning web site you best contact would be your local planning officer, or visit our on-line customer support area for further assistance.
With all building work, the owner of the property (or land) in question is ultimately responsible for complying with the relevant planning rules and building regulations (regardless of the need to apply for planning permission and/or building regulations approval or not).
This is a commonly asked question and you will find that most garden sheds, workshops, summerhouses and log cabins are exempt from most planning limits provided the building is more than 2m away from the boundary or less than 2.5m overall height. You will find this will cover most situations but it's YOUR responsiblity to check for your own location. You can do by calling your local council and asking to speak to the planning officer. This will ensure you won't have any issues afterward. For more detailed advice about the question - Do I Need Planning Permission For A Garden Shed - Garden Workshop ? - please visit the government web site about planning permission here.