- Great Hall: With its 60' high ceiling, this room is a focal point of the castle. Note the sculpted figures adorning the pillars.
- Library: The herringbone oak floor pattern creates different shadings from each end of the room. On the ceiling is Pellatt's coat of arms.
- Dining Room: Lined with circassian walnut, the dining room was originally separated from the library by unique panelling.
- The Conservatory: The floor marble is Italian but the side panels are of Ontario marble. Steam pipes kept the flower beds warm in the winter.
- Serving Room: Also used as a breakfast room, this room contains original Pellatt furniture.
- Peacock Alley: Modelled after a passageway in Windsor Castle. The walls are oak and the floor was teakwood.
- Sir Henry's Study: The mahogany panels conceal a secret door on either side of the fireplace.
- Smoking Room: Quiet games of chess or cards were enjoyed here.
- Billiard Room: Sir Henry and E.J.Lennox, the architect of Casa Loma, recorded a long running game of billiards in this room.