Exterior St Michael's is constructed in
coursed stone with dressings of
Runcorn red
sandstone ashlar, and has tiled roofs. Its plan is
cruciform, consisting of an
aisleless
nave with a north porch and side chapels, north and south
transepts, and a
chancel with a
clerestory and aisles, and an attached meeting room and choir vestry. Above the
crossing is a two-stage octagonal
flèche surmounted by a tall spire. At the west end is a large central
buttress flanked by two-light windows with pointed arches. Above these in the
gable are three small
lancet windows. On the north side of the church is a
timber-framed porch with a gable and side windows. To the east of this is a single two-light window and two three-light windows. There are similar windows on the south side of the nave. The chapels have two-light windows on the west and three-light windows on their sides. The transept gables contain a three-light window flanked by buttresses, and two lancets above them. In the clerestory there are three small lancet windows on each side. The large east window consists of five stepped lancets. There are further lancet windows in the rooms adjoining the chancel. ==Present day==