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Do I Need Planning Permission to Install Secondary Glazing? It is possible to put in secondary glazing within the existing frame in order to reduce the energy costs and block out outside noise. It's perfect for period properties and listed buildings where new windows are not an option. It's a great solution for damp buildings too However, it is best to use it after other issues have been addressed to stop draughts from depriving the building of essential airflow. Do I require planning permission? Cha