Field help: Renewal of windows / external doors

Enter the costs for new or energy-efficient windows, balcony and patio doors, and exterior doors.

Eligible items may include:

• Windows with multi-pane insulating glass,
• Roof windows,
• Balcony and patio doors,
• Exterior doors to heated rooms,
• Energy efficiency improvements to existing windows,
• Windows and doors in listed buildings or buildings of historical interest.