Exterior
The early house is built of brick in English garden-wall bond with sandstone quoins, some repaired with rendering, and slate roofs. Two principal floors with second floor over, 'E'-plan facing S, with a central porch, recessed bays either side and forward wings. Gothic pointed arch doorway with a studded oak door and crest over, set below a label mould which rises to a string which extends between floors completely around the front elevation. Shaped gables to the porch and wings, straight coped gables to the recessed bays. Stone finials. The windows are ogee-moulded behind a chamfered surround, mullioned and transomed, five light to the porch chamber, and 4-light to the ground floor of the wings, 3-light above and 3-light without transoms to the attics. Lead downpipes with the Trevor crest on the hoppers. The return ends of the 1612 house are of 2 bays, the second bay similarly gabled. On the W side, a single storey 3-bay extension of c1808, extended a further 2 bays for the kitchen, and a similar balancing wing on the E, 3-bays to a drawing room, the windows being longer, and 2 further bays containing a conservatory. Shaped gable over the centre bay of each wing. Twelve-paned sashes with 3-centred stone heads, and chamfered plinth. Both wings terminate in a 3-sided bay, with the roof hipped, the S having a shaped gable and the ground floor extended as a terraced balcony.
The rear elevation has 5 window bays at each end with shaped gables, and a narrower central bay, also with a shaped gable over, and a 3-storey canted bay window with arched stone lights to the principal floor under a painted brick arch. Timber windows with labels to the 2nd floor and extruded corner towers with similar but smaller gables. External stairs each on an arcaded base placed each side rise to a crenellated parapet, and provide access to the main floor. At the centre, a stone panel records that 'the N and W fronts, with the hall and staircase, were erected from the sole design of Charlotte Viscountess Dungannon, 1808, whose genius planned, and whose taste embellished, the surrounding grounds and park'. The recessed bay on the right has a large window with stained glass, lighting her great stair hall.
On the E side, where the early C19 rendering has not been removed, there is, behind a canted bay, a tall circular tower of 5 stages, ending in a crenellated top. Canted bay behind. Further to the rear is a recessed section wtih an indented centre, trefoil and pinnacle over, and a further canted bay.