C15 in the main, and consists of nave, chancel, north and south aisles and additional north and south aisles built within the last hundred years.
The vestry was built in 1410.
Suckling states that the main building"probably owes its erection to the Argentein family." The square tower dates from C15, being completed about 1420.
There is a marble tablet to the memory of Sir Henry Bedingfield, who died in 1687 and to Charles D`Urban who died in 1769, infant brother of Sir Benjamin D'Urban, also a native of Halesworth and Governor of the Cape of Good Hope, after whom Durban, Natal, was named.