The Norman lord, Ernulf de Hesdin, granted the manor of Ruislip and probably its church to the Benedictine monks of Le Bec-Hellouin in 1087. Officials administering this alien priory’s English lands had a small chapel at Manor Farm. Bec’s prestige and a population increase apparently caused the church’s enlargement, but later heavy taxation of alien priories brought about disrepair and confiscation. By 1422, John, Duke of Bedford granted the church’s income to the Dean and Canons of Windsor, who continue to appoint the vicar.
Medieval features survive, notably wall-paintings, two piscinas, a priest’s door and two wooden chests. 15C expansion included a north vestry (demolished) and a tower with later bell-chamber currently housing eight bells and a 19C clock. There are 15C and 16C references to chantry priests. Furnishings include monumental brasses, linenfold panelling, 17C pulpit and livery cupboard, wall monuments and funeral hatchments. The stained glass windows are of 19C and 20C.
Around 1870, Sir Gilbert Scott and Ewan Christian restored the church. A west porch and two lych-gates were added, followed by a 20C vestry, sacristy and hall. The larger former parish is now sub-divided.