Bell turret C15, and spire. organ chamber C19.
Flint rubble cement rendered externally with dressings of limestone, roof of handmade red clay tiles.
The chancel arch is semi- elliptical, approx. 1.5 metres thick, indicating the junction between the C12 nave
C13 chancel.
The N wall has a re-set C12 doorway, blocked.
The S wall has a re-set C12 doorway with original plain voussoirs forming the tympanum arch.
The roof of the nave is plastered in 5 cants, probably concealing a medieval timber frame.
Also at the W end is a panelled gallery on 4 carved standards with gilt inscription on black paint to William Walker, citizen and ironmonger of London, 1704, and recording other benefactions, and staircase with turned balusters.
On the S wall 2 areas of plaster have been removed to expose wall paintings of c.1400, one of St. Christopher richly coloured.
In the 2 W windows of the chancel there are 5 small rectangular panels of Swiss glass illustrating biblical scenes, with German inscriptions, shields of arms and dates 1630-37.
Stalls with panelled backs, upper panels with carved and pierced foliage, c.1700.
There are numerous wall monuments to members of the Lockwood family, C18 and C19.
There are 3 bells by John Clifton, 1640, James Bartlet, 1684, and another. 'A church of quite exceptional charm and historical range' (Pevsner, Essex, 256).
See D.R. Curnocke: A Wall Painting In Lambourne Church, Essex Naturalist, 29 , 32 and plate 5, and E.C. Rouse: A Wall Painting discovered in Lambourne Church, Essex Archaeology, 25 , 101-2.