Iver is a large village in the SE corner of the county, 5 miles E of Slough and under half a mile outside the M25 and the Middlesex border. The church consists of an aisled nave with a W tower and chancel. In 1896-98 a N vestry was added at the E end of the chancel, and in the late 1990s it was extended to link with the N nave aisle and converted to an annex to provide a crèche, tea room, kitchen and lavatories. The oldest parts of the church are on the original N nave and chancel walls, and are either late Anglo-Saxon or early post-Conquest. The most striking feature of the early church is a blocked window above the present N arcade This arcade was cut through the wall later in the 12thc, and is of two broad bays. The three-bay S arcade belongs to the 13thc, as do the chancel and west tower (which was heightened in the 15thc or 16thc.). There was a major restoration by G. G. Scott in 1847-48, and a less extensive one by J. O. Scott in 1890. The church is built of flint with some Roman brick incorporated.

Iver was held by Robert d’Oilly in 1086. It was a large manor of 17 hides with 3 mills, meadow for 30 ploughs, 4 fisheries supplying 1500 eels, woodland for 800 pigs and a vineyard. The listed inhabitants numbered 42, suggesting a total population of some 200 people. Before the Conquest the manor was held by King Edward’s thegn Toki. Subsequently Robert’s lands were united with those of Miles Crispin to form the Honour of Wallingford, and when the heirs joined monasteries the honour was seized by King Henry II. His first tenant was Rufus de Sessun, and at his death the king granted it to Gilbert de Veer. In 1199-1200 it was granted to the family of Clavering, passing from father to son until the line failed in the 1330s and the manor reverted to the crown. The later history is given in VCH. The church descended with the manor until it was granted to the collegiate church of Windsor by Edward III. Meanwhil, but the advowson had already been successfully claimed by the Abbot of Langley in 1216.

Pevsner and Williamson (1994) suggest a very late Anglo-Saxon date for the blocked window, but it could be as late as 1100. The trumpet scallops in the nave arcade date this feature around 1170, and the imported Purbeck font could date from the same time.