The church is built of slatestone rubble with granite and freestone dressings, under Delabole slate roofs. It comprises a nave and chancel under one roof, with a west tower, north transept, south aisle, porch, and a vestry north of the chancel. The north wall of the nave retains 13th-century fabric, including lancet windows and a later medieval doorway. The north transept, partly rebuilt in the 15th century, has a two-light window in the north gable and a reset 13th-century window in the east wall.[2]
The 15th-century west tower is of two stages with diagonal buttresses, a battlemented parapet, and a tall octagonal granite spire restored in 1636. The moulded granite west doorway lies beneath a three-light Perpendicular window, and the bell stage has two-light openings with trefoil-headed lights and slate louvres.[2]
The south aisle, largely 15th century, contains Perpendicular windows including a three-light east window; parts of the walling were rebuilt in the 19th century. The south porch incorporates reused medieval granite elements and carved oak wall-plates.[2]
The interior has a seven-bay granite arcade with moulded piers and four-centred arches separating the nave from the south aisle. The roof structure is largely 19th century but includes reused medieval timbers. Built-in stone benches survive in the north transept and south aisle.[2]
Medieval fittings include an aumbry (a cupboard for storing shared vessels) in the chancel and a trefoil-headed piscina in the south wall. A surviving Norman font holds a square top decorated with arcading and a round bowl on a central column with corner shafts. Six carved oak bench ends from the early 16th century survive, decorated with tracery and shields; two include carved pomegranates, a symbol associated with Catherine of Aragon. The remaining seating and fittings are largely 19th century, including a polygonal oak pulpit and choir stalls.[2]
Monuments include a 13th-century sepulchral coffin slab with a quatrefoil-headed cross in the north transept, and a Baroque marble memorial to Edward Hobbs, located on the north wall at the east end of the south aisle.[2]