St Martin's church is located on the south side of town at the junction of Mountain Road and St Martin's Road. It was built in 1877-9 (on the site of an earlier chapel) to designs of C.Buckridge (1873). The nave was lengthened by two bays in 1904-5 and the north-west tower built in 1907-10, both under G.E.Halliday, and the south aisle was widened in 1938.
The church is built in Early English style with geometrical tracery and constructed of snecked, rock-faced grey-green sandstone and Bath stone dressings under red-tiled roofs. It consists of nave (originally with lean-to aisles), lower chancel with cross-gabled chapel and vestry, north-west tower, gabled south aisle, north aisle, north porch, and small lean-to in north-east angle. Inside, the arcades have round piers and double-chamfered arches; the clerestory has two windows per bay. Fittings include a medieval font with octagonal bowl keeled down to a square base, and reredos of pink Penarth alabaster. Stained glass includes works by Hardman (1879), and Frank Roper.

Sources:
extracts from Cadw Listing database; J.Newman, Buildings of Wales: Glamorgan (1995), pp.176-7.

RCAHMW, 28 April 2015