Glazed extensions let natural light flow into the room and to the rest of the house as part of an open plan layout. The quality of light can make a space feel brighter and more spacious as well as adding actual square footage. Glass walls and roofs afford better views of the garden and sky that you can enjoy all year round.

The terms 'glass extension' or 'glass box extension' tend to refer to a specific type of home addition which is predominantly glazed. They are more structurally sound than traditional conservatories and many sunroom ideas, hence their increasing popularity.