St John's Church was located on the west side of Giant's Grave Road. It is recorded that a Mission Church dedicated to St. John the Baptist was erected at Giant's Grave in 1878. It was built at a cost of £601, constructed in stone, in the Gothic style, and consisted of chancel, nave, western porch and a turret containing one bell; there are 212 sittings.
By mid-2013 the church was closed and had been proposed for redevelopment as a dwelling.
Sources:
http://forebears.co.uk/wales/glamorganshire/briton-ferry
planning.npt.gov.uk:8251/view.aspx?Doc=382674

David Leighton, RCAHMW, 18 December 2014