Inside the front door is the hall which is quite small but is beautifully decorated with plastered ceilings of classical motifs, door frames and plastered walls. The wooden floor is really outstanding. It is a parquet floor made from exotic wood. Many of the trees which provided the beautiful wood are now extinct. If we continue across the hall we enter the saloon.
The main apartment of the Casino is the saloon, decorated in blue and white with silk hangings secured by a striking gilded border. The ceiling is curved and contains the head of Apollo appearing from a sun burst. In order not to clutter the room with doors to the two rooms off the saloon Chambers used hidden doors called gib-doors to the side rooms. You get the impression that there is only one door in the room. The floor of the saloon is again a parquet floor with the Star of David in various coloured wood as a centrepiece. The original furnishings are lost but we read that the fireplace was made of white marble and carved by Francis Harwood in Italy around 1768. Opposite the chimney piece there was a very elaborate table with a lapis-lazuli top made by Joseph Wilton in London in 1773. Both of these disappeared without trace in the nineteenth century.
The western arm of the cross is occupied by the China Closet. This room was originally intended as a bedroom but Lady Charlemont had some beautiful china ware and she used to keep it in this room where she would show it off to her dinner lady guests while the men had their port and smoked in the saloon. The ceiling in this room is decorated with agricultural motifs spades, rakes and scythes. The floor is again very exotic.
The Zodiac room or study shares the eastern arm of the Greek cross with the stairs. This is called the Zodiac room because the circular ceiling has the sign of the Zodiac around the dome. The small scale of the room results in it being only lit by part of the external window. The remainder of the window lights the stairs.
The stairs is a practical one and is not anything as ornate as the ground floor. The first floor corridor is multi-levelled. The State room is the most colourful in the Casino. It is decorated in green and white with gilding and a screen of columns. It is a comfortable room. Some scholars say that decor of this room was designed by Vierpyl and not Chambers. This room suffered a lot of damage and has been extensively restored. The original room was thought to be on two levels with a chaise lounge on the upper level. Charlemont conducted quite a lot of his meetings in this room where he would be seated on the chaise lounge. This chaise lounge has been restored in the USA and will be on display in the Casino next year.
The other upstairs rooms are very functional and make very good use of light. They have very interesting features such as built in cupboards in the window surrounds. The ceilings are curved so as to reflect the maximum light.
The basement contains the kitchens and other staff rooms. The columns he used for drainage of the rain water appear in these rooms and there is an inspection hole for blockages which can be accessed by removing a wooden covering on the base of the column. The basement is vaulted.