[4][5] The plan of the church consists of a nave, with north and south aisles, and a long narrow chancel.

[4] The chancel, which is separated from the nave by an Early English arch, is approached by a flight of steps, necessitated by the sloping nature of the site on which the church is built.

The east window is an example of a single Early English lancet with very wide splays and shafts in the inner arch.

[4] The main roof timbers, both in the Nave and Chancel, date from the sixteenth century, whilst the ceiling above the sanctuary is panelled and its bosses and carvings picked out in gilt and colour.

The inscription has been read as: CAELIXTUS MONEDO REGI, and is thought to mean Calixtus King of Mona.

The small vestry adjoining the north side of the chancel was also constructed at the same time on the site of a previous building.

The Compton Two Manual and Pedal Organ, a memorial gift, was dedicated by the Bishop of Bangor on 1 June 1969 (the eve of the feast of St Bodfan) at the time of the re-hallowing of the church after the restoration.