The church is the only one in Rutland that is cruciform in plan with a central tower. The 148ft spire is on four arches with triple shafts. The spire and tower date from the 14th century.[4] There is an arched frieze and broach spire which has statues of the Blessed Virgin Mary, St Peter, St Paul and Angel Gabriel.[5]
There is a nave with south and north aisles separated by arcades, a vestry, a chancel, north and south transepts and the tower. The clerestory was added in the 15th century.[6] From 1861 to 1862 the church was restored by George Gilbert Scott,[6] and the chancel was restored in 1863. The roof, decorated with angels, was designed by Sir Charles Nicholson[5] and completed in 1950 after his death.
The font, dating from the 14th century, is octagonal.[5]
The east windows of the chancel and south aisle have stained glass designed by Ninian Comper. A medieval wooden door with a statue and niche of the Blessed Virgin and Child is on the south porch.[5]
An arched doorway dating to c. 1190 is at the west end of the nave.[5]
The tower (completed in 1862) and spire (1867) of Leicester Cathedral are, according to Pevsner, loosely based on Ketton's.[8]
