This church is surrounded by parkland, the neighbouring manor house having been burnt down in 1814. Originally 14th century, it was remodelled in the 18th. All the furnishings are Georgian, including the font, pulpit and box pews.
Wheatfield had a church with a rector by 1202, although a document from 1240 or 1241 still refers to it as a chapel. The oldest features of the Church of England parish church of Saint Andrew are the chancel arch and a doorway on the south side of the nave, both of which are 14th century. There is a blocked Perpendicular Gothic window on the north side of the chancel. The king post roof is probably 17th century.
John Rudge had St. Andrew's remodelled early in the 18th century, and this Georgian work obscures most Medieval features except those above. The church retains its Georgian features and fittings, including a Venetian east window and 18th century box pews. The wooden communion table is a high-quality carved piece from about 1745, that Sherwood and Pevsner considered similar to the work of John Vardy.
St. Andrew's contains several 17th and 18th century monuments to members of the successive manorial families, including one to John Rudge made in 1739 by the Flemish sculptor Peter Scheemakers. The chancel includes 14th century stained glass showing the arms of the Whitfield family and the west window of the nave has 18th century glass showing the arms of the Rudge, Letten and other families. The Venetian east window of the chancel has late Victorian stained glass by Morris & Co.
St. Andrew's has no tower; only a bell-turret. It has one bell, which was cast in 1636 by Ellis I Knight of Reading, Berkshire. The church has no running water or electricity; its only lighting is from candles mounted on 18th century brackets.
St Andrew's church is a Grade I listed building.