Designed by Warren Heywood Williams and Arthur Lorenzo Smith of Portland, Oregon, the castle’s original architectural plans have not been preserved, and only one known interior photograph exists from the period when the Dunsmuir family resided there.

[6] Prefabricated components, including stairs, doors, window frames, and 2,128 panels, were manufactured in Chicago and transported to Victoria.

Various types of wood were used in the interior, including white oak for the main hall and staircase, Spanish mahogany in the library, western red cedar in the porte-cochère and back hall, cherry in the breakfast room and window sashes, Hawaiian koa in the drawing room floor, and American ash for the back stairs.

The building also features an encaustic tile floor by Minton, Hollins & Co. imported from England, with decorative patterns characteristic of Victorian-era design.

These elements contribute to the historical and architectural significance of the site.The Drawing Room at Craigdarroch Castle functioned as a formal reception area for guests and may have also been used for smaller family gatherings.

The ceiling of the Drawing Room originally featured hand-painted decoration, which was covered with white paint in 1935 when the castle was repurposed as Victoria College.

The floor of the Drawing Room is made of Hawaiian koa wood, a material also used in the construction of musical instruments such as guitars and ukuleles.

Over the years, the room has served multiple purposes, including as a recreation space for patients during the castle’s use as a hospital, a classroom during its time as Victoria College, and an office when the building was used by the School Board.