The nave and lower stages of the west tower are late Norman. The font is also Norman, but decorated with a series of pointed arches. The chancel and third stage of the tower are 13th-century. The nave clerestory, north and southaisles and their four-bay arcades are 14th-century additions. The clerestory has five windows on each side. Most are Perpendicular Gothic, but two on the north side are Decorated Gothic. The two-storey brick south porch is early 16th-century. The panelled south door is oak, dating from the same period. Control of the church at Sutton varied between Abingdon Abbey and the Pope. In 1258 the Abbey leased the church. When Hugh Courtenay inherited the manor he took over the rights from the Abbey. Around the tower door are marks in the stone believed to be carved by soldiers returning from the Crusades, thanking God for their return. The tower has a clock with a one-handed dial, one of only 22 in England. The five-bay rood screen is 15th-century. There is a wall painting above the chancel arch of the Stuartroyal coat of arms. In 1643, in the English Civil War, gunpowder and munitions stored in the church exploded, shattering windows and damaging part of the tower. The King's coat of arms is believed to have been painted after the restoration of the monarchy in 1660. Of the church seating, one of the pews is dated 1633. The hexagonal pulpit is Jacobean and was given to the church in 1901.
The parish registers for christenings, marriages and burials cover the years since 1538–39. They are held at the Berkshire Record Office, Reading.
Churchyard
About south of the chancel is a 15th-century chest tomb decorated with quatrefoil panels. It is a Grade II* listed structure. Also notable is an 18th-century chest tomb about east of the chancel. It was built for a Thomas Dalby, who died in 1734. 's tomb Notable people buried in the churchyard include UK Prime Minister H. H. Asquith and his second wife Margot Asquith, newspaper owner David Astor and novelist George Orwell. Writer Bill Bryson visited the graveyard, and commented in his book Notes from a Small Island "How remarkable it is that in a single village churchyard you find the graves of two men of global stature." Asquith, who died in 1928, is buried in a large stone chest tomb south of the chancel. He wanted his grave to be at Sutton Courtenay rather than in Westminster Abbey, and was buried after a simple church service. Margot Asquith was buried with him in 1945. Orwell is buried in a simple grave, now with a red rose bush growing on it. Orwell had no link with Sutton Courtenay but was a friend of David Astor, who arranged his burial in the village in accordance with Orwell's dying request to be buried "according to the rites of the Church of England, in the nearest convenient cemetery". His body was brought from London and buried on 26 January 1950.
