Its west tower is in red brick and is described by Simon Jenkins in his 1999 book England's Thousand Best Churches as "magnificent, a unified Perpendicular composition of red brick with black Tudor diapering.
Strong angled buttresses rise to a heavy battlemented crown, the bell openings plain."
One of the three pieces of a Sarsen stone is located next to the west door of the church the other two pieces being left either side of Fryerning Lane.
A chapel built onto the chancel contains several family tombs of the Petre family, which lived locally at Ingatestone Hall - these include the monuments of William Petre, his second wife Anne Browne, John Petre, 1st Baron Petre and his wife.
The tower is 83 feet (25 metres) high.