Extensive and irregularly-planned house in late Perpendicular Gothic style with some late C16 Renaissance detailing; of roughly J-plan, its principal elevations face SE (courtyard side) and NW. The primary blocks, the hall range and Solar Tower, stand at right-angles with each other facing SE and SW respectively in to the courtyard. N and W wings join the hall range at either side forming a `U' with it to the rear; the Solar Tower is connected to the hall and N ranges by an L-shaped addition, extruded in the angle on the NE (terrace) side. The tower is of three storeys plus attic (originally Four); the remaining ranges are of 2 storeys. The house is constructed generally of large squared slate-stone blocks (ashlar to the main faces) on a chamfered plinth; slate roofs with leaded parapet gutters behind characteristic finialled parapets to all ranges save the Solar Tower. Eleven tall ashlar chimneys, all at gable ends except one lateral chimney to the rear (terrace side) of the tower; these have distinctive crenellations of carved slate above the capping. .Stone-coped gable parapets throughout, with shaped kneelers to the Solar Tower. Sandstone dressings to openings, mostly mid and late C16 to the Hall and Solar Tower ranges, and mostly c.1828 to the N and W wings; these in imitation of the latter. The Solar Tower has a large storeyed porch, the lower section of which is probably mid C16 and relates to the alterations carried out by John Wynn ap Meredith; large Tudor-arched opening with stopped-chamfered reveals, eagle and lion relief carvings to the spandrels, and a moulded, returned label. The label stops are carved with the initials I and W (for Iohannes Wynn). The porch appears to have been heightened at the end of the century to create a `wrap-around' glazed bay to serve the first-floor Great Chamber; this has a 4-light window with arched-headed, leaded lights to the front and 2 light windows to the sides; moulded, returned labels. Large square-framed, moulded recess above, containing a sculpted heraldic cartouche with the Wynn eagle. Pyramidal slate roof with oversailing eaves supported on heavy, shaped corbels with faceted ends. Original (though some altered) window openings flank the porch on 3 floors, one to the L and 2 to the R in each case; two C19 occuli flank the porch roof under the eaves. Full-height square stair projection to rear with coped and kneelered gable. This is an addition of c.1540 and includes a large proportion of material re-used from Maenan Abbey; later C15 ogee tracery windows on 3 floors. To the L of the stair tower, a large lateral chimney with projecting, gabled breast. The W end chimney is gabled and diagonally off-set at the top; it surmounts a former garderobe projection. The hall range has a semi-octagonal stair projection to the R of centre on the courtyard side, re-used from Maenan, apparently in its entirety, c .1540. Ogee tracery windows to the top, as before and a blocked 4-centered-arched entrance to the SW face. Early C20 Tudor-style entrance to R. Gabled end chimney to L gable, corbelled-out at first floor and gabled, moulded and diagonally off-set. Cross-windows as before to ground floor, and arched-headed leaded windows of 2 to 4 lights to the first. Similar entrance to NW (Dutch Garden) side with cross-windows to R, as before, and two 2-light mullioned windows to L, on ground floor. Twin and single light cusped-headed Gothic windows to first floor; most windows on this face have been slightly enlarged.
Mid C16 N wing, raised late C16; the W wing is a C19 balancing copy of this, built to house a kitchen. Similar twin and single-light Gothic windows to ground floor, mostly C19, though some possibly late Medieval in the earlier block. Arched, ovolo-moulded windows, twin and single-light to the first floors, again C19 copying the original in the case of the W wing. Primitive figurative gargoyles appear on each gable end, 2 to each; these are probably medieval. A mid and late C16 gabled cross-wing adjoins the later W wing, facing the courtyard. Mid C16 Tudor entrance with I.W initials and spandrel carving as before; boarded and studded door. First-floor C19 oriel window with stone roof. Further mid-C16 entrance to Terrace and a plain arched service entrance with label to SW face of W wing.
Adjoining the western gabled cross-wing on the road side is the main gateway. This consists of a large chamfered Tudor arch with I.W initials and carved heraldic shields (bearing the Wynn arms) to the spandrels; carved lion supporters as label stops. To the L of the arch a carved datestone with the date 1555, and to the R of the entrance, a similar stone inscribed: `Rd (for restored) 1828.' Further carved arms of the Wynn family above. Stepped coping to wall above arch with a later C16 re-set stone trefoil finial of `Gwydir' type; this also bears the I.W. monogram. Large rubble piers project outwards flanking the gate; stone benches to the inner sides. Adjoining to the R a single-storey square gatehouse block;.flat roof with parapets as before. Entrance with boarded door and adjacent cross-window to NW (inner) face and slit-light facing road; C20 rubble extension to SE.