Nanhoron

Nanhoron is a large house, built in the Regency style with later additions and alterations. The main south front is particularly imposing, constructed from ashlar granite blocks with a low-pitched slate roof that has a significant overhang at the eaves. The symmetrical two-storey facade features a large central four-panel door, the upper two panels glazed, and a delicately traceried fanlight above. Five nine-pane sash windows are set in the upper storey, while the ground floor has two tall twelve-pane sashes flanking the entrance, each with deep stone lintels and shallower stone sills. A verandah with a gently coved lead roof and elegant cast-iron supports, ornamented with anthemion motifs, extends across the front, and the architectural detailing is carried around the corners of the facade.

To the east, the upper floor has three nine-pane sashes, while the ground floor displays two late 19th-century plate-glass sashes on the left and one twelve-pane sash to the right. On the west, the upper floor has four nine-pane sashes, and the ground floor again has two late 19th-century plate-glass sashes (to the right) alongside a 20th-century glazed door, followed by a twelve-pane sash to the left.

The west facade extends northwards in a different style, forming a three-storey range with a break in the building line. The left side of this section is constructed from coursed, rough stone blocks, while the right side uses rougher, irregular-sized stone. This section projects slightly and has a deeply overhanging hipped slate roof supported by shaped brackets, with two stone chimneys featuring oversailing caps. The left part is a two-window range with six-pane sashes on the top floor, nine-pane sashes below, and twelve-pane sashes at ground level. The windows in the right portion are slightly lower and misaligned with these; a smaller six-pane sash is located on the ground floor.

The north side of the house is enclosed on three sides to create a small courtyard. A boarded porch in the middle has two windows in its gable end, the lower one having marginal lights. To the left are a pair of twelve-pane sashes. Elsewhere, six irregularly placed late 18th-century metal casement windows are present. One of these windows is fitted with late 19th-century Aesthetic Movement coloured glass, while the others retain their original 12-pane fixed and opening lights, stone lintels, and thin slate sills. A courtyard wing to the east has a pair of 20-pane sashes on the ground floor and a dated slate tablet inscribed 'ILE/RM/1834' above the window head. A wing to the west has two twelve-pane sashes on the ground floor and a reset datestone reading '1677 ERA'. A large early 20th-century billiard room is attached to the east.

The interior features a fine entrance hall, with a staircase approached through a Palladian-style arched opening flanked by Ionic columns and responds. The staircase itself has an open string with cast-iron balusters supporting a slender rail. The dining room (to the right) and drawing room (to the left) open off the main hall, and both feature moulded ceiling cornices, dados, and marble fireplaces.