Council House

The Council House is a three-storey building featuring three windows, constructed from local brick with a slate roof and rectangular brick chimneys. The second floor has three almost square windows with voussoir lintels and modern small pane glazing. The first floor includes three twelve-pane hornless sash windows, also with voussoir lintels. On the ground floor, there is a central Doric doorcase with a pediment and panelled returns, leading to a panelled door topped by a semi-circular overlight with intersecting tracery. To the right of the doorway is a mid-19th century semi-hexagonal bay with a splayed slate roof and twelve-pane hornless sashes. To the left is a later 19th century rectangular shopfront bay, featuring a hipped slate roof, steps leading to a part-glazed door with a rectangular overlight, and a shop window to the left with rectangular panes and coloured glass in the top margin. The left gable end has a projecting chimney. At the rear, there are two two-storey gabled wings flanking a tall gabled staircase tower with a tall round-headed window. The main block's rear is slate hung and has two 20th century casement windows on the top floor.

Inside, the house contains a series of wall paintings created around 1812 by Lieutenant Pierre Augeraud, a French prisoner of war and one of 148 Napoleonic captives held in Llanfyllin. The paintings depict scenes of mountains and lakes, featuring ruins in Gothic, Classical, and Picturesque styles, along with tiny human figures. The room on the ground floor to the right (behind the bay window) has an 18th century style interior with a dentil cornice and dado panelling. The staircase features urn balusters and an open string. The main rooms are fitted with broad six-panelled doors that have panelled jambs.