Built between 1787 and 1793 to house a large collection of orange, lemon and citron trees inherited by Thomas Mansel Talbot. It is a Grade I listed building and one of the finest classical buildings in Wales. Designed in 1787 by Anthony Keck, it is of regular classical consumption, ornamental in appearance and functional in design. It is made of local Pyle sandstone, with Sutton Stone from the former mansion used for the rear, most of the labour was provided for from within the estate and cost £16,000 at the time.