The Town Hall

The Town Hall, dating to circa 1765, was remodelled in the mid- to late 19th century. It is constructed of red brick in English bond, with a sandstone ashlar base and dressings, which were refaced with cement render in the 19th century. The roof is slate, hipped to the south. The building stands on a rectangular plan with a basement and two storeys.

The south front has a rusticated basement and pilaster strips to the ends, a moulded impost band to the ground floor, a moulded stone cornice, and a central triangular pediment. Above sits a wooden cupola, consisting of a square base with clocks to the south, east and west, a cornice and an octagonal bell-stage with Doric columns, a frieze, a cornice and an ogee lead cap with a weathervane. A flagpole stands at the rear. The first floor features a Venetian window with a plain architrave while the ground floor has a round-arched window with late 19th-century cast iron glazing bars, a moulded architrave, and a keystone. Two circular basement windows have wrought-iron grilles. The east and west fronts have five bays each; the first floor has glazing bar sashes with flush frames and gauged brick heads with keystones, with the second and fourth bays to the east and the bay to the right on the west being blind. The ground floor features round-arched windows with fluted keystones, a continuous moulded impost band, and late 19th-century cast-iron glazing bars above. Boarded double doors are located in the east and west fronts to the north; a former lock-up in the basement to the south now houses public lavatories.

Inside, the north side contains an entrance hall with an office above, and a ground floor hall to the south, with a courtroom (likely a former Council Chamber) above. A staircase from the 18th century is situated in the entrance hall, featuring an open string, heavy turned balusters (two per tread), a moulded ramped handrail, and columnular newel posts. The courtroom may contain an 18th-century "bench" with pilasters and raised panels.

Bishop's Castle was historically a "rotten borough" before the 1832 Reform Bill and was the smallest in England when it was dissolved in 1967. The Town Clerk's office contains a collection of old prints of the town, commemorative items such as clocks, and borough records.