Castle Fraser is contemporary with other nearby castles: Craigievar Castle, Crathes Castle and Midmar Castle which are also believed to have been designed by the Bell family of master masons. The castle was modernised in a classical style in the late 18th century, with a new entrance inserted in the south side and sash windows throughout. This work was supervised by Elyza Fraser, the lady laird. Elyza was also responsible for the landscaping of the grounds, sweeping away the remains of the original formal gardens and orchards, and for the construction of the impressive octagonal stable block.