C13 chancel restored from ruinous state 1890-1, sedilia and aumbry added 1940, northern addition of larger nave and chancel 1960, porch restored 1987.
All windows C19 or C20 apart from 2 small Norman windows in west wall of south aisle.
Gabled porch with bargeboards, buttressed south wall, lancet window, 3-light east window, curved east end of chancel, unlit with foundation stone dated 1960, attractive use of 2 tiers of brick laid end on to form chamfered plinth, north wall 3 full-height buttresses, 6-square-headed metal casement windows set between brick piers with bonnet hip tiles laid edge on as decorative capitals, west end doorway flanked by 2 bows with curved metal windows set below eaves, south front organ loft stair turret with curved facade and many paned window.
The church at West Blatchington had fallen into disuse by the late C16 and was ruinous by 1700.