Slate roofs with ridge tiles and gable ends.
west tower of late C14.
South aisle and south porch added in early C15, with north aisle and rood stair of late C15.
C15 4-light window with C19 mullions, cusped lights with upper tracery, 4-centred arch and hood mould with label stops.
The third stage is corbelled out with a double upper string course and recessed panels between the string courses to east, south and west, with 3 panels, each with a carved figure.
North aisle of 5 bays, with four 3-light C15 windows, with cusped lights, square heads and hood moulds recessed surround.
5-bay north arcade, with taller 4-centred arches, with 2 concave mouldings and Pevsner A-type piers with geometric carved abaci.
The north arcade was probably built at the same time as the rood screen, as the capitals of the pier on that side is not carved, whereas the pier on the south arcade is carved on all sides.
Fittings: C19 pews and pulpit, and fine organ, with panels with painted figures of the saints.
Part of the C15 rood screen preserved in the north aisle.
Monuments in north aisle: oval slate convex tablet with stone carved wreath surround with putti and grotesque mask, to William Brendon, 1700 4/5.
recumbent stone effigies, to Sir Anthony Rous of Halton and his son Ambrose, both died 1620, both in Jacobean armour, with 2 shields of arms with helms and inscription tablet on the wall at the east end.