Replacement windows

Do you need to apply for approval?

You do need to apply for approval for:

  • Non-domestic buildings
  • Windows not being installed by a FENSA or CERTASS approved installer on domestic properties

You do not need to apply for approval if:

  • Windows are installed by a FENSA or CERTASS approved installer on domestic properties
  • You are replacing glazing (e.g. smashed window)
  • You are repairing rotten framework

Apply for approval

Find an approved installer

Fees

Fees must be paid at the time of applying.

Technical guide