Trewern Mansion

House of three storeys, facing W to a large forecourt. Rendered (over ashlar masonry, described in 1981) with a small plinth and an oversailing plain parapet, small chimneys, one offset to the right of centre and one over the right side parapet near the front and another over the left side parapet near the rear. Concealed slate roofs. The front range is of five windows, the outer pairs set slightly closer. Recessed exposed frames, with the unusual feature of reeded window-frame ornament. The glazing bars have probably been removed at ground storey for conversion to plate-glass glazing. The upper windows are of four panes. Central tetrastyle (2 + 2) porch with plain Doric columns and rear pilasters and paterae frieze. Doorway with double three-panel doors, side lights and traceried fanlight, composed as a Venetian Window.

The rear elevation is symmetrical with outer full-height bows. Centre of three windows, each bow of three windows. The left bow has a small front area with basement windows. Oversailing plain parapet. Sash windows as at front, but those of the top storey are of six panes, the others all of four panes. The joinery of the bow windows is cut on the curve. Two French windows in the centre block, one curiously constructed with an upper sash.

The interior was described in earlier list description as planned around a central entrance hall, opening into a lateral rear hall with cantilevered open-well staircase with nosed treads and scrolly ironwork handrail. Good detailing includes plaster cornices (paterae frieze to dining room), ceiling roses, elliptical arches on brackets, six-panel doors in moulded architraves. Drawing room chimneypiece with Adamsesque frieze, carved tablet and fluted columns.