The staircase survives intact with very few alterations. There were minor departures made on execution, with a variant balustrade inserted. The grisaille panel paintings, trophy panels and tromp l’oeil panels all survive, although the tromp l’oeil statues of Juno and Minerva are later additions, possibly dating to the 1920s.

Adam designed three Tuscan screens for the ground storey level, but these do not survive. King suggests that only the screen facing the stairs was ever executed, and this has since been replaced.

On the second floor there are four Ionic screens forming galleries and four niches, which currently contain tripods. As King notes Adam’s design shows them incorporating statuary.

Other examples of the use of the Imperial staircase within Adam’s interiors can be seen in the later designs for Culzean Castle and Dalquharran Castle.