The church is prominently sited on the main street, in the centre of the hilltop village of Gerrans. The village adjoins the former fishing village of Portscatho, and the spire is an important landmark, seen from both the sea and the surrounding countryside. The church itself it set within an oval, raised churchyard, or lann. The current form of the church is a nave and chancel under one roof, a N transept and S aisle, with a tower and spire at the W end.

The restoration scheme of 1849 to 1850, carried out by William White of Truro, involved the rebuilding of almost the whole church. It was, however, carried out in a manner sympathetic to the vernacular style, using local materials and reusing the original windows. The result successfully suggests the continuous development of the church since the 13thc..

The only feature remaining from the Norman church is the font.

Gerrans, one of the four Roseland parishes, lay within the important episcopal fief of Tregear. Tregear Manor, the capital of this fief, lay about a mile to the north of the church. The church was rebuilt by the Normans, probably to a cruciform plan. A tower was added in the 14thc., and the church was extensively altered in the 15thc. leaving nothing of the former church. An octagonal spire, an unusual feature on Cornish churches, was added to the tower in the 17thc., apparently as a navigational aide for fishermen and sailors.

The church fell into serious disrepair until it was restored in the mid-19thc..

The church is an attractive local landmark, and makes a very positive contribution to the townscape of Gerrans. The simplicity of the font gives it a certain beauty, and it is in good condition for its age.