Tower of 3 stages with string courses and plinth, diagonal stepped buttresses and embattled parapet, and corner gargoyles on string course below parapet.
Nave roof lowered in C15 and embattled parapet added with single-arch bellcote at east end.
Transepts of late C13 with windows of different periods on each wall.
Interior: C15 nave roof of 7 bays, with 3 moulded transverse beams supported on slightly cambered braced cross beams, with struts to stone corbels.
Transitional chancel arch with chevron moulding and carved capitals.
North transept has remains of C14 wall paintings around windows which have cusped rere-arches, Early English piscina and credence, large recumbent effigies of George Lloyd and wife on tomb chest with pedimented canopy on fluted columns.
South transept has series of slate wall tablets in Latin of C17 to Pleydell family, recording date and hour of death.
Marble monument to Robert Pleydell by Edward Stanton in chancel.
SP0601 : Holy Rood, Ampney Crucis - Wall monument