Nannau

Nannau is a three-storey, five-bay house dating from the 18th century, built in a restrained Georgian style. The house has a square plan and is constructed of large dressed blocks of local slate-stone with sandstone dressings. It features a shallow, hipped slate roof with plain chimneys. The main, southeast-facing front has a recessed, wide entrance bay. An elegant entrance porch is present, supported by Ionic columns and featuring a simple moulded entablature. Within the porch is a large 19th-century part-glazed door with 12 panes in the upper section and a panelled lower section, accompanied by flanking 8-pane internal windows. Above the porch is a tripartite sandstone window set in a shallow, segmental arched recess with a 12-pane central light flanked by narrow 4-pane vertical lights. A similar, shorter window is situated on the third floor, comprising three equal lights, all with plain 19th-century sash glazing. Tall 12-pane recessed sash windows are found on the ground floors of the main and side elevations, with contemporary 6-pane sashes to the upper elevations. The middle floor has plain Victorian sashes to the front and left-hand sides, although the original 12-pane glazing remains on the right-hand side; all windows are topped with projecting stone lintels. External, stepped cellar access is provided to the first side bays from the front. Original decorative and heraldic lead hoppers are present, two dating to 1795 and two to 1872. The house has a plain parapet with a moulded cornice, and balustrading above the entrance bay. The rear elevation is of rough-dressed rubble with disturbed masonry, showcasing 12 and 16-pane windows alongside a modern fire escape to the first floor. Out-of-character, flat-roofed modern extensions have been added to the ground floor rear.

Adjoining the right side of the house is a triple-arched section of walling, which is a surviving fragment of the original pavilion wings.

The entrance hall features an open segmental arch with an inner archway leading to the stairwell, incorporating Ionic and engaged columns and a dentilated entablature. A dentilated plaster cornice adorns the hall, along with a wooden fireplace featuring a moulded egg-and-dart entablature, engaged Doric columns, and scallop-headed niches. A well stair extends over three floors, constructed with a swept mahogany rail and decorative iron balusters. Moulded doorcases, with 6-panel mahogany doors, are located off the hall. The drawing room to the right has a decorative plaster cornice and moulded architraves with gadrooned and carved overdoors, flanking a restrained marble fireplace with panelled pilasters and foliate carving to the central plaque. A shallow, segmental-arched niche is set into the rear wall, containing twin doors. Reeded window architraves are present alongside panelled shutters. The left-hand ground-floor room exhibits an Adam-style plaster ceiling and cornice, with panelled splays mirroring those previously described. A wide segmental-arched opening leads into the rear room, complete with a plaster cornice. Upper floors have been modernised, featuring partitioned-off areas and false ceilings.