The C15 arcade and the principal plan layout survives.
Fine C15 west tower of 3 stages, moulded plinth and strings dividing stages of diminishing width, embattled parapet with corner pinnacles.
Bracket-moulded C15.
Old slender weathered buttress at either side with ancient carved head over each.
Old slender weathered buttress on the right of this opening with carved head over and wide C19 buttress on the left.
There is a fragment of Norman masonry built into the south east corner.
Interior : between the nave and north aisle is a C15 7-bay standard A (Pevsner) arcade with steep 4-centred arches between.
Otherwise the features are C19: arch braced windbraced roof structures and C19 glass in the C19 windows.
C19 column of 4 engaged shafts standing on a freely carved square-on-plan base with entwined figures, set into a C19 octagonal granite slab.
Otherwise C19 fittings: polygonal pulpit on granite base, parclose screen between chancel and north aisle, painted mosaic reredos depicting the Last Supper, granite sedilia with polished granite shafts in the south wall of the chancel and several coloured glass memorial windows Monuments : in the north aisle are some ancient reset brasses circa 1400-1599 and some fine stone monuments to members of the St Aubyn family including: Geoffrey St Aubyn, c.1400, Geoffrey St Aubyn and wife, c.1490, and Thomas St Aubyn and wife, C.1550 (Pevsner).
The brasses (3) are reset in slate and difficult to decipher.
2 C18 monuments: a limestone chest with moulded base, recessed square carved corner columns, panelled sides and moulded black marble lid to Sir John St Aubyn of Clowance, Baronet, died 1714 aged 45 and a fine marble wall monument Ionic aedicule with triangular pediment with dentilled cornice
Of the C19 is a marble wall monument carried on enormous consoles with inscribed plaque between to Sir John St Aubyn of Clowance, Baronet, 1758-1739, above is a mourning female figure in Grecian dress leaning on an urn.
Several memorial windows including: west window of south aisle, given by George Hickman Johns BA in memory of his wife and west window of north aisle to Henry Jenkin of Kerthen, 1860.