Philadelphia Chapel inc. attached Chaple House and attached Sunday School

Philadelphia Chapel, along with the attached Chapel House and Sunday School, is a significant building dating from the early to mid-19th century. The main facade, which faces Globe Street, features an advanced central bay with an entablature that rises above the eaves. This bay includes a Serliana with a blind central arch, marked by a keystone, and is flanked by windows supported by pilasters and a cornice. Above this, there is a plaque that records the history of the chapel. On either side of the central bay, there are single square-headed upper windows with shallow architraves and a pedimented entrance doorway. The gabled ends of the building are topped with chimneys. The rear of the chapel has three windows on the upper level and two windows along with a door on the right side at ground floor level. To the left, a forecourt features a plaque noting the donation of land for a rent of one peppercorn per annum.

Attached to the right gable, which faces Morris Street, is the Chapel House, dating from the early to mid-19th century and remodeled in the 1930s. It has smooth cement render with a cemented plinth and a slate roof. This two-storey structure has three windows, with the entrance doorway located between the first and second windows. The doorway features a bracketed pedimented doorcase in cement render and a part-glazed panelled door. The end of the house facing Globe Street has a parapet with a gablet and a single window on each floor, both with replacement glazing and shallow architraves that match the adjacent chapel.

At the rear of the chapel, connected via a fuel store, is a single-storey school building from the earlier 19th century. This building also has cement rendered walls and a slate roof. To the left, there is a doorway with a pedimented doorcase and a simple panelled door, along with three round-headed windows; the right return features two round-headed windows.

The interior of the chapel retains an early 19th-century character, with a ceiling that has ribbed geometrical decoration. A gallery extends to three sides, supported by classical iron columns, featuring splayed corners and a panelled front, along with wooden benches. The angles at the front of the building have enclosed staircases and lobbies. Behind the panelled set fawr enclosure is a balustraded convex pulpit with flanking stairs. An organ is located on the rear wall, with supplementary pipes adjacent to the lobby entrances. The front windows contain stained glass, and the floor is raked with box pews.