Mackintosh's work on the Ingram Street Tearooms dates to 1900, when he was commissioned as sole designer.
This was just after he and Margaret Macdonald were married, and the two of them worked together for the first time.
Major work was done on Ingram Street Tearooms over the years. Mackintosh’s last work on there was done in 1911 when he worked on a redesign of the Cloister Room.