In the past, orangeries were grand glass buildings used to grow orange trees in large stately homes.  Large expanses of glass ensured the sun's heat reached the plants and ripened the fruit. 

 

Today orangeries are available on much smaller homes and are glazed structures that have a lantern on a flat roof or an internal pelmet around the perimeter of the ceiling to create a strong, robust, yet well lit structure.

   

An orangery is a beautiful extension to your home with a glass roof that typically covers less than 75% of the overall roof area, and glass walls that cover less than 50% of the total wall area.