chancel, C15 aisles, porch and tower, restored 1883-5 by James Crocker of Exeter.
The niche has flanking pilasters and richly carved pinnacled canopy and contains the figure of St Matthew - a gift to the church in 1885 by the Rev. George Dowty.
Porch has Beer stone ribbed vault springing from angel corbels over half-engaged columns in each corner and features a series of bosses carved to represent the stigmata and other symbols of the Passion.
C14 moulded volcanic chancel arch (Pevsner's B Type) has caps to half-engaged columns, the wave is carried continuously through.
Superior five bay Beer stone arcade on both sides, three arches to nave and two to chancel, has clustered column shafts with carved foliage capitals and, in the chancel, demi-figures of angels bearing shields above pier capitals.
Floor includes many grave slabs of notable quality from late C16
C17, some in black or white marble.
Blocked C15 arch-headed volcanic stone doorway to former rood stair in north wall.
The Maw's encaustic tile floor to chancel, the Beer stone Gothick reredos featuring carved emblems of the Evangelist and polychrome mosaic, stalls, pews, (including much reused C18 oak), stained glass and altar rail date from 1885 restoration.
Font of 1874.
Possibly C15 plain arched piscina to right of reredos and also niche in north chapel for aumbry or piscina.
North chapel contains graves and memorials of families who lived at Upcott Barton.
In north east corner is a good marble wall monument of 1691 to John Moore comprising an oval plaque with nut husk garland architecturally framed, flanking Corinthian columns, moulded entablature, open pediment with ascanthus and egg-and-dart cornice crowned by heraldic cartouches, the whole carried by a moulded sill on fluted brackets which frame a later panel in memory of John's wife It preserves traces of ancient colour.
In south west of chancel a good grey marble mural monument to Nicholas Hickes and Elizabeth his wife
the carved drapery with swags include an oval tablet with bolection-moulded frame, an heraldic cartouche with flanking cherubs heads and, at the bottom, a skull with wings.
To left of reredos and partly obscured by it is an early C19 mural monument to Reverend John Arundel
Over south door painted arms of Charles II dated 1665 was naively restored in 1971.
Tower has ring of six bells, the oldest was cast by John Pennington of Exeter in 1665, in a frame of 1893.
Church was dedicated to St Mary before 1850 and known as All Saints in C14.