The limestone building have a slate hipped roof . It is rectangular with a projecting doric portico entrance and an extension to the rear . The interior is laid out in a U shape , with the larger Ball Room and Tea Room along either side with the octagonal Card Room at the end . The rooms have Whitefriars crystal chandeliers and are decorated with pictures by Thomas Gainsborough , Allan Ramsay ( artist ) , Edwin Long and William Hoare .