west tower early C12
south aisle, chancel extension and perhaps upper part of tower c.1200
C11 parts coursed rubble
Later medieval stepped buttresses on south and west and narrow round-headed lights in each wall.
C19 two-light belfry openings in Saxon style, except on east where there is an old blocked opening and weatherings of 2 levels of nave roof
North wall of nave shows three 1873 trefoil-headed lancets, and jambs of blocked medieval door.
Chancel shows medieval masonry in lower parts of walls only
Incorporated in east wall C12 chevron- moulded voussoir and head of C12 cross slab.
C11 slightly-stilted round chancel arch of one square order, with chamfered impost band
Font has older octagonal bowl on C19 panelled shaft and moulded base.
NU2415 : The Parish Church of St Peter and St Paul, Longhoughton, Font
Monuments: various C18 and early C19 wall tablets in south aisle.