Llanddewi Rhydderch Baptist Chapel

The Llanddewi Rhydderch Baptist Chapel is a rectangular building, likely dating to the early 19th century. It is rendered and painted, with a hipped slate roof finished with lead flashings. The external render is incised with lines to simulate the appearance of ashlar stone. The corners of the north front, originally emphasised with raised render to look like stone quoins, have been removed. This north front features a single-storey wooden porch supported by freestanding, fluted cast-iron columns carrying a plain entablature. Reeded pilasters flank a 6-panel double door, the upper four panels being moulded and the lower two flush. Above the porch is a window with a lugged architrave, currently containing late 20th-century plastic glazing in the style of a 6 over 6 sash window.

The west side elevation has three irregularly spaced windows, also with lugged architraves and projecting keyblocks; these are 8 over 8 pane sash windows. The third window, set apart, indicates a later chapel extension, to which the roof is hipped. The east side elevation is blank. The south wall has two round-arched window openings. All glazing within the chapel has been replaced with late 20th-century plastic units, but within the original window frames.

The interior, described as part of a 1998 listing, consists of a small, single-cell chapel featuring a gallery from 1826. The entrance lobby has early 19th-century panelling and a stone flagged floor. Doors lead to the main chapel and the gallery. The north (entrance) end has a raked gallery with open-backed benches at the front and close-boarded benches behind. The gallery staircase has winders and plain balusters. The gallery front has moulded vertical panels supported by two slender cast iron columns with plain capitals. The main chapel has a plaster ceiling rose decorated with radiating stylised leaves. An attractive brass corona lucis hangs by chains from a crested circlet ornamented with fleur-de-lys, a pendant finial, and three lamps with opaque flame shades. Side walls have early 19th-century moulded dado panelling. Later 19th-century varnished pine pews are close-boarded with shaped ends, the centre block and side blocks being slightly angled. Pew-ends have 19th-century lamps mounted on slender columns, two with spiral-turned brass shafts and palmette capitals with globe shades, and two with wooden spiral-turned columns and flame shades. A raised pulpit platform is reached by straight stairs on both sides. The pulpit itself has newels with ball finials, turned balusters, and lamps with flame shades at each end. In front of the pulpit is a small, square ‘set fawr’ enclosure with close-backed seating for deacons. The east wall has a projecting chimney breast. A pronounced change in the building line on the west side wall marks the position of a late 19th-century chapel extension.