The tower was probably started in the late C14 (Sedding), the second
third stages added in the C15.
The north and south aisles and porches are probably late C15.
North and south aisle have almost complete circa late C15 Perpendicular tracery with varying lead patterns to glass.
The C15 north and south porches have 4-centred roll moulded granite arches with incised spandrels and hood moulds.
the doors are probably late C17, of double construction with heavy raised and fielded panels.
5-bay C15 granite arcades to north and south aisles with type A (Pevsner) piers, moulded bases and caps and moulded 4-centred arches.
Fine quality C15 carved rood screen across east end of nave, north and south aisles with 2-centred arched openings with Perpendicular tracery.
fine moulded balusters with inscription 'JOHN RUDDLE MINISTER OF LAUNCESTON PREBENDARY OF EXON AND VICAR OF IRIS PARISH 1684'.
Bench at west end of church inscribed 'WP: SC ANNO 1684'.
Fine quality C16 bench ends and remains of some benches.
C19 pulpit.