dry Delabole slate roofs with coped gable ends and crested clay ridge tiles.
Originally a cruciform plan of which north wall of nave, chancel and possibly foundations of north transept survive, extended in the early C15 with south aisle and south porch and in later C15 with west tower
round-arched west doorway with C15 three-light traceried window above and traceried louvred windows to belfry.
Tower windows are typical late C15 Perpendicular style
C15 windows to north and south aisle windows have Y tracery, some have had mullions and tracery restored in the C19.
C15 south porch doorway has moulded responds and 4-centred arch
C15 tower arch and tall standard A-type (Pevsner) arcade with 4-centred arches
C19 memorial windows with coloured glass: east chancel to Carlyon, north chancel to George and Jacobi Cornish
Fittings: C17 painted letter from Charles I
otherwise C19 fittings including granite font, pews and pulpit and freestone reredos with trefoil-headed squat colonnade of 9 bays.
Monuments: in north transept nowy-headed plaster and slate wall monument to Edmund Powell 1784
in south transept wall marble to John Richards Paul of Bosvigo 1826-1907, north wall Gothic-style limestone wall monument to William Mitchell 1845, south wall marble monument with urn by Isbell to George John (and family) 1808 of Trehaverne and marble monument with shield and urn by King to George Nicholas John 1797, aged 8.