Sullivan House, Former Baptist Chapel

Sullivan House, formerly known as the Baptist Chapel, is a building located on Hill Street in Saffron Walden. It was constructed in 1792 and underwent renovations in 1890, with additional changes made in the 20th century. The chapel is no longer in use and is accessed via an alleyway west of No. 25.

The structure features a timber frame with plaster and brick walls on the ground floor, topped with a peg-tiled roof, which has some repairs made with brown clay tiles in the 20th century. It has a rectangular plan and stands two stories tall. The east front elevation consists of three bays, highlighted by a 19th-century projecting ground floor gabled porch, flanked by 20th-century flat-roofed additions. The porch is adorned with shaped barge-boards and has a plain doorway with an overlight, along with simple arch-headed blind niches on either side. The door is a 19th-century design with two leaves and six bead-moulded flush panels. The first floor features 19th-century sash windows with glazing bars arranged in a 4x4 pane configuration. The roof is hipped.

On the west end elevation, there are two windows on the first floor, which have moulded architraves and sashes with glazing bars, also in a 4x4 pane arrangement. The ground floor has a 20th-century full-width slated lean-to addition with a central gabled porch that matches the style of the east end porch. This addition includes two 4x4 paned sash windows and a two-leaf door with four panels. The hipped roof has two ridges with a small valley in between.

The north and south side elevations are similar, each featuring two first-floor sash windows with moulded architraves and glazing bars in a 4x4 pane layout. The ground floor has three 20th-century two-light metal casement windows. On the left side, within the ground floor porch, there is a 20th-century casement window with glazing bars arranged in a 2x2 pane configuration.

Inside, the first-floor rooms have a panelled dado and some 19th-century panelled doors. The ground floor has been refurbished and altered in the 20th century. The congregation that originally used the chapel was founded in 1711 by Robert Cosen, who was the steward of Audley End House.