Pen-yr-heol Chapel

Pen-yr-heol Chapel is a building constructed from colourwashed stone, topped with a half-hipped slate roof. It consists of a single cell with an added boiler house extension at a right angle, featuring a large terminal stack and a stone slate roof. The chapel has two bays and includes a 20th-century blockwork porch at the northwest front end, which is covered with asbestos slates and re-uses double planked doors along with 'Y'-tracery pointed windows. The original inner entrance is made up of a pair of three-panel doors. On the sides of the chapel, there are two pointed-headed timber windows with stone voussoirs.

On the southwest side, there is a stone inscription panel that reads: "The Memoir of/TWO HUNDRED AND /FORTY POUNDS of The/Pious Donation of /Thomas Williams/of the Island GENT/in the Parish of/ Llanigon and County/ of Brecon, band/for the Use and Benefit/of this Penyrheol/Church for ever. // Ll.....ve 1 ft."

Inside, the chapel has a very simple plastered interior. The roof features open timber trusses that divide the space into two central full bays and quarter-bays at the ends. The pulpit is a part-octagon set against the east window, which has been partially covered.