In most cases, you will NOT need planning permission for installation of windows but will require a FENSA Certificate. 

As from 1st April 2002 all windows and doors (doors being 50% glazed or more) installed after this date will require a FENSA Certificate.  On completion of your installation a FENSA Certificate will be posted to you directly from FENSA within         10- 16 weeks from the date of completion. 

There are some exceptions where a Fensa Certificate will not be required, these are as follows:- 

  • Doors installed are less than 50% glazed 
  • All conservatories installed are excluded 
  • Garage doors or doors installed within a garage are excluded
  • Planning Permission or Building Regulation Approval have been applied.

There are some exceptions that Planning Permission may be required from your Local Authority, these are as follows:-


  • Your house is in a conservation area, a National Park, a registered AONB (Area of Outstanding Natural Beauty) or any other area, officially considered to be environmentally sensitive
  • Your house is a Grade I or II Listed Building

When spending your hard earned money on new windows, doors, conservatory or roofline products you want to make sure your investment is going to be looked after in the unlikely event of something happening. 


For peace of mind Classic Windows offer 10 Year Insured Backed Guarantee with Homepro Insurance. This policy is to be requested upon your order.  Should you wish to obtain an additonal policy, please speak with our agent to obtain a quotation.