Cefn Mably

The main block faces S and has a C16 hall with a parlour cross wing to its L, beyond which is a lower gallery terminating at the L end in a chapel projecting forward. To the R of the hall is the service block ranged around a central courtyard. Of rubble sandstone with limestone dressings, fragments of stone-tile roofs (mostly now missing) with projecting eaves. The hall and service block have exposed steel trusses.

The hall is 3-bay, the bay to L advanced and formerly under a hipped roof, with a sash window in segmental-headed architrave to the upper storey added early C18, while the other bays have similar openings but the windows are now destroyed. Contemporary attic dormers are also now destroyed. The 2-bay parlour has similar sash windows and architraves. The gallery has late C19 fenestration, with 3 mullioned windows under relieving arches in the lower storey, and a 4th window to L converted to a door for the hospital, and five 3-light mullioned windows in the upper storey. An earlier advanced bay at the L end of the gallery retains C16 4-light mullioned windows to the S gable end below a stone end stack.

The chapel has a 3-light Perpendicular S window to the chancel (the liturgical E end) and diagonal buttresses. On the ridge between nave and chancel is a gabled bellcote for a single bell. The porch is on the W side and is overgrown. In the E wall is a 3-light square-headed Perpendicular window.

The parlour and the S range of the service block have tall red-brick stacks. The doorway to the original cross passage is now knocked out and blocked up. The 2-storey service range E of the hall is of 7 bays with a brick string course between the storeys, and has openings with brick jambs but the windows are all now missing. Its end wall is 2-bay, to the R of which the E wing of the service block is set back and is of 5 bays with mullioned windows, the upper storey windows under gablets, and 2 paired stone stacks. The N wing of the service block has a central gateway to the courtyard under a Tudor arch (now boarded up), flanked by cross windows with 2 blocked windows further L and late C19 cross windows to the upper storey under gablets. The E wing of the service block is higher, with cross windows in its gable end and W return wall.

Behind the hall is a lower 2-storey projection, to R of which is a stair projection with mullioned windows.

Not inspected at the time of survey, but most early features appear to have been destroyed in the 1994 fire.