Will i need Permission?


Use our quick and easy automated quiz to see if you building is Permitted Development


If you are still unsure after reading this helpful guide please give us a call and we can go through the process with you.


There are two separate issues when considering a new garden building – Planning Permission and Building Regulations. Often people speak about these two things together as if they were the same but this is not the case.

The good news is that due to the unique design of an ARK Timber buildings, most do not require planning permission. Building Regulation is based on building size and use, so for most small garden buildings, you do not need a building to match building regulations.


Please read on for more information. The information is preliminary advice and is our interpretation of publically available information. Please see www.planningportal.gov.uk for advice from the UK government.



The permitted development rules define a set of criteria which, if the development matches, planning permission is not needed. This means there is an easy guide or checklist you can follow and, if your plans for development match, you will not need planning permission.

The last major update to the Permitted Development rules was in 2008. The list is as follows:



·         No outbuilding on land forward of a wall forming the principal elevation.

·         Outbuildings and garages to be single storey with maximum eaves height of 2.5 metres and maximum overall height of four metres with a dual pitched roof or three metres for any other roof.

·         Maximum height of 2.5 metres in the case of a building, enclosure or container within two metres of a boundary of the curtilage of the dwelling house.

·         No verandas, balconies or raised platforms.

·         No more than half the area of land around the "original house"* would be covered by additions or other buildings.

·         In National Parks, the Broads, Areas of Outstanding Natural Beauty and World Heritage Sites the maximum area to be covered by buildings, enclosures, containers and pools more than 20 metres from house to be limited to 10 square metres.

·         On designated land* buildings, enclosures, containers and pools at the side of properties will require planning permission.

·         Within the curtilage of listed buildings any outbuilding will require planning permission.


*The term "original house" means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date). Although you may not have built an extension to the house, a previous owner may have done so.

*Designated land includes national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites.

(Source – planningportal.gov.uk – information taken 21/10/2014)


Listed buildings, national parks and other areas where everything requires planning permission do not apply under Permitted Development, so people living here must seek permission.


If you wish to place your new garden building within 2m of a boundary, then the building must be under 2.5m at its highest point. 

ARK Timber building products are designed for the UK market, in response to the Permitted Development rules and to help our customers avoid planning issues.


What if the permitted development rules do not apply to my plans?


Just because your plans do not pass all the criteria, this doesn’t mean that you won’t be able to build. If your plans do not fulfil the permitted development criteria, it means that you will need to contact your local council and possibly apply for planning permission.At ARK timber Buildings we would happily make discreet enquires to your local authority for you and help with any planning issues.

Remember that if you do need to apply for planning permission, often your neighbours will be given the opportunity to object, so talk to them first about your plans and consider how you can ensure your building or structure will cause as little inconvenience as possible.




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