Industrial buildings are usually exempt from planning permission, however there are limitations that each structure must adhere to:
A new building cannot be higher than 5m, if within 10m of the curtilage boundary. In every other case the building can not be higher than 15m OR the highest building within the curtilage boundary, whichever falls shorter.
A new building cannot exceed gross floor space of 100m2 in areas of specific scientific interest. Every other case can span up to 200m2.
A building extension cannot make the building higher than 5m if within 10m of curtilage boundary. In other cases, the extension cannot be taller than the original building.
Development must be within the curtilage of an existing building. Gross floor space can’t exceed: 110% of original building or 500m2 (whichever is lesser) on designated land. 125% of original building or 1,000m2 (whichever is lesser) on a site of scientific interest. 150% of original building or 1,000m2 (whichever is lesser) in all other cases.
No development can come within 5m of curtilage boundary.
No development can be within the curtilage of a listed building.
On designated land, any new buildings or extensions must be made with materials similar in appearance to those used by industrial buildings already on site.
Planning permission will be rejected if the building impacts parking spaces or turning circles.
Any new buildings or extensions must relate in some way to the current use of the original buildings.
No new, extended or altered building to provide staff facilities: Between 7pm and 6.30am, for employees other than those present at the premises of the undertaking for the purposes of their employment. At all, if a notifiable quantity of hazardous substance is present.
If any of these requirements raise questions, it is always best to consult the local planning authority in your area before proceeding further with your installation. You can also apply for a “Lawful Development Certificate” from your local authority if you believe that your structure is exempt from needing planning permission.
Please also bear in mind that while these pointers are a solid guide to go by, there may be variations to these limits dependent on your local authorities’ own rules so it is always better to check with the local planning authority before undertaking any development.