presbytery rebuilt c.1250
nave widened to south, south transept rebuilt and west range constructed 1275-1300
cloister ranges converted to house in mid- C16.
Nave has chamfered plinth, pilaster buttresses on north and west, and a moulded cornice on corbels below a C15 heightening.
At west end a blocked doorway, with a late C13 2-light window, replacing a pair of earlier lancets.
two late C13 2-light windows
a C15 stair turret.
East range of cloister 3 storeys: largely mid-C16 with 2-, 3- and 4-light mullioned windows, those to ground floor with heraldic or head hoodmould stops.
Interior: C16 lst-floor fireplace with flat-pointed head
the north end the C13 groin-vaulted rere-dorter undercroft with a segmental-arched fireplace.
North range shows remains of warming house fireplace, and a large C16 stepped stack to north.
Historical notes: Abbey founded between 1195 and 1198 by the de Multon family, as a daughter house of Easby.
After Dissolution in 1540 it was granted to Robert Strelley and the domestic buildings converted to a house, which by the C19 had labourers' cottages. c.1900 the north transept was demolished to provide stone for paving the stable yard at Rokeby Hall.
Scheduled Ancient Monument.