The parish church of South Perrott now serves as the church for the adjoining parish of Chedington following the closure of the latter's church in the 1980's.

In the latter quarter of the 15th century substantial work was undertaken on the church involving increasing the height of the transept and nave walls, replacing the arches of the crossing, inserting larger windows of 3 cinquefoil lights in the nave and transepts, building a stair turret for access to the tower and adding another stage on the tower. The view of the church shown above from the north-west has remained unaltered for over 500 years; similarly that from the south, with the exception of a vestry built in the south-east corner on the site of a former 16th century chapel. South Perrott is one of the few medieval churches in the district not to have been the subject of any drastic restoration particularly in the Victorian era.

Around 1828, due to subsidence of the structure of the tower, towards the south-east, remedial work was done to repair the arches of the crossing and a buttress added to prevent further movement.

In the period 1907-1910, when the vestry was built and a new east window inserted, the interior furnishings of the church were completely replaced all to designs by A Southcombe Parker of Plymouth who in 1913 also designed the organ case. The window in the south transept was donated in memory of Rev. Stroud, rector of the parish from 1873-1904.

The font is an octagonal bowl of early 13th century date. The cover was made in1845 by Philip Daw of South Perrott.

The piscina in the south wall of the south transept is of 15th century date.

There is a group of bell ringers for the six bells.
The bells were re-cast in 1927 from the original three which dated from 1650 and 1828