Most conservatories installed in England and Wales generally do not require planning permission unless:

• Your property is a listed building
  
• Your property has had significant additions to living space added in the past
  
• You are building the conservatory on the front of your house
  
• You are intending to use the conservatory for non-domestic purposes

However, we strongly recommend that in all cases, you contact your local planning office and discuss your project with them prior to ordering to ensure that any obligations are met with regard to planning permission. As the house owner, it is ultimately your responsibility to make enquiries with regard to any local authority requirements affecting alterations to your property.
 

For England and Wales consult the planning portal pages here.

In Scotland you will require a building warrant before commencing any work even if planning permission is not required.  You will find some helpful resources by following these links:

Scottish Borders

The Scottish Government Web Site

Planning Procedue in Scotland