Bethel Calvinistic Methodist Chapel, including Vestry to Right

Bethel Calvinistic Methodist Chapel, including the vestry to the right, was built in 1829 and extensively restored in 1904 by architect David Jenkins of Llandeilo. The chapel features a long lateral facade with a 20th-century spar-dashed finish, previously rendered, and a slate roof. A full-length shallow gable was added in 1904, complete with a timber consoled cornice. The glazing and doors date from the same restoration.

The facade includes two central high round-arched windows with 17 panes and marginal glazing, flanked by arched doorways with boarded doors and fanlights that feature simple radiating tracery. Above these, there are two offset upper windows, each with 9 panes, matching the style of the lower windows. Small ground floor windows at the extreme ends have 6 panes and similar heads. A tablet on the pediment reads: "Bethel Capel y Trefnyddion Calfinaidd. Adeiladwyd yn 1749. A Ail adeiladwyd yn 1829. Ac A Adnewydd yn 1904." The rear of the chapel has two long windows similar to those at the front.

The chapel is enclosed by rendered dwarf walls topped with decorative Edwardian cast iron railings and matching cast iron gates in front of each door.

Attached to the right is a two-storey early 19th-century vestry, which has a rendered front with two 4-pane sash windows from 1904 and two doors to the left. To the right of the vestry is a single-storey rubble former stable featuring a boarded door with a cambered stone voussoired head, a similar door at the rear, and a window to the left with 20th-century glazing.

Inside, the chapel has a simple ceiling that is coved on three sides with timber ribs and cornice, while the center is boarded with a decorative wooden ventilator. There is a three-sided, slightly curving timber gallery supported by cast iron columns painted to imitate granite, with a bracketed front and long panels of cast iron openwork above diagonally set boarding. Panelled pilaster strips and a moulded cornice enhance the interior. The raised timber pulpit has a panelled front and is flanked by sweeping staircases with turned balusters. Behind the pulpit is an impressive timber tabernacle-board featuring fluted pilasters and a triangular pediment, with moulded arched panels in the center and roundels above.