Capel Dewi is located within a rectilinear field, with a footpath depicted as running its length on historic (1889-1906) Ordnance Survey mapping.
The remains of Capel Dewi consist of two buildings orientated east-west.
The larger appears to be rectangular and measures some 10.5m by 6.5m. Its now turf-covered stone walls were roughly dressed 0.6m thick and now up to 1m high.
Some 8m to the east are the remains of a smaller rectangular building some 9.5m by 5m. It too has turf-covered stone walls 0.8m thick and up to 0.4m high.
The site was visited and surveyed by RCAHMW staff in June 1986.
Ordnance Survey, 1889, first edition 25inch
Ordnance survey, 1906, second edition 25 inch
N Vousden, RCAHMW, 12 September 2012