Garth Isaf Farmhouse

Garth Isaf Farmhouse is a largely 17th-century farmhouse, with later alterations and additions, exhibiting group value. The farmhouse is constructed of rubble stone with a renewed, medium-pitch slate roof and a tiled ridge. Simple eaves cornices and parapet gables are present, finished with overlapping slate-stone coping and rounded kneelers. Tall end chimneys are visible, the one on the left having an upper section rebuilt.

The front (north) elevation features an off-centre entrance, positioned on the right, with a simple returned label above the original, heavily-studded oak door set on a hinge-post. To the right of the entrance is a tall, recessed 12-pane sash window, and to the left are two further, smaller 12-pane sashes. Above the entrance is a small, rectangular leaded window set under the eaves. Three additional windows matching the lower floor extend to the upper storey, breaking the eaves and contained within large, rubble-built gabled dormers with slate coping and rounded kneelers.

The rear (south) elevation also has an off-centre entrance, to the right, leading to a slate slab porch with a rubble projection on the left, and a boarded door. Flanking the porch are two windows with original returned slate labels; the one on the right has fixed 6-pane glazing, and the one on the left is a 12-pane casement. An elegant 12-pane sash window is located to the far left, featuring a projecting cill and lintel. Two catslide dormers, one with a 12-pane window and the other with a small 2-pane window, are present, along with a small cellar light to the far left. Further 6- and 12-pane windows are found on the west gable, and a large 12-pane window is located on the east gable, with a small original slit window to the left.

The entrance hall contains earlier 18th-century large-field raised oak panelling and a dado. A contemporary, wide dog-leg staircase rises from a moulded, round-arched wooden opening, complete with projecting scrolled key and similar imposts. To the right of the entrance hall is the former parlour, also featuring vertical large-field panelling, a dado rail and horizontal panelling below. A deep, heavily-moulded architrave frames the doors and windows on the right-hand wall, and a moulded cornice is also present. A stone fireplace, inserted around 1700, is of bolection moulded design. Above it is an original 18th-century panelled overmantel with a heavily bracketed and moulded cornice. Deep, panelled window reveals are present, and behind the right-hand side of the fireplace are the remains of an original 17th-century stone newel stair. To the left of the stair hall is the kitchen (formerly the hall), with further panelling on three of its walls. A large fireplace features a stopped-chamfered bressummer and a 17th-century panelled salt box niche to the left; early 19th-century brick ovens and a range are built into the fireplace. A large transverse stopped-chamfered ceiling beam, with similar subsidiary beams (partly hidden), represents original 17th-century work. This is partially interrupted by an 18th-century pantry/service partition, panelled as before, with a bolection moulded doorcase and boarded door and stone steps down to the cellar beneath the parlour. A later 18th/early 19th-century built-in pine dresser is located on the rear wall.

A galleried landing is present on the first floor, with balusters matching those of the staircase. Raised and fielded panelled doors and a wooden round arch are also present, leading to the passage. A 18th-century wig closet, stepped down to the left of the stack in the left-hand chamber, boasts a built-in arched-canopied seat and fitted shelving. The original 3-bay roof retains pegged collar trusses.