Small C13 nave and chancel plan, east front masonry indicates narrow width of previous chancel.
Very exposed position and fortified appearance with 1 window only to north and south sides and deep battlemented coped parapet carried on C13 moulded corbels, some replacement of parapet and corbels.
1 round-headed circa C12 window on south side, change in plane of south wall indicates rebuilding.
North side has single lancet circa C13 window, evidence of rebuilding in change of wall plane.
Small 3-stage battlemented C15 west tower has 2 moulded strings, no west door.
Rectangular opening on north face to bellringers' stage, round-headed openings with carved spandrels on north, south and west faces.
Rim of bowl retains fastenings for font lock.
Almost flat roof of 1889-90, said to be a copy of the C15 roof: massive rafters, moulded to the nave, unmoulded to the chancel, rest on heavy bead-moulded wall plates supported on long plain corbels.
6-sided drum pulpit of 1884-1890 has moulded cornice above frieze of pierced rectangular panels.
Benches and altar rail contemporary with pulpit.
The first church on the site was built circa 1130 by Robert Giffard, Lord of the Manor of Lamerton, and may have been built as a chantry chapel.