Dolgun Isaf Farmhouse

Dolgun Isaf Farmhouse is an end chimney, cross passage, three-unit regional house, dating back to the 17th century and with later alterations. It is situated downhill, with a ruined wing from the later 17th century at the rear. The farmhouse is approximately one and a half storeys high, constructed of rubble masonry with a boulder foundation. It has a steeply pitched slate roof with plain eaves and raking gable copings to the left end. A square stone stack, featuring a moulded cap and water tabling, is located at the left end.

There are two 18th-century gabled stone dormers with close verges. The windows are mostly 2-light casements with small panes and timber lintels. Three modern skylights have been added. The broad central doorway has a timber lintel and a plank door with strap and pintle hinges. To the left, there's a 2-light, small-paned casement window, followed by a larger 2-light window to the extreme right, both with timber lintels. A 2-light, small-paned casement window is positioned to the right, originally broader, and also has a timber lintel. A deep 2-light, small-paned casement window is on the extreme right, possibly a former doorway, also with a timber lintel. A blocked stair window is visible in the left gable end, and a blocked window is in the right gable end.

The rear elevation displays a rear cross-passage doorway in the centre, under a broad timber lintel, with a modern door. A small window is to the left, set within a modern frame, and a similar 4-pane casement is to the right. To the extreme right is the truncated gable of the former 17th-century wing. A window is set within a gable end above a modern rubble lean-to with a slate roof, incorporated within the ruins of the wing. There is a plank door and a 2-light window. Ruined elements include an end chimney and hearth.

The original layout, consisting of a hall, cross-passage, two service rooms, and a further room beyond, remains largely intact. The cross-passage was originally open to the hall. Inside, the farmhouse features stop-chamfered transverse ceiling beams, with one beam resting against a wall on a moulded corbel, alongside stop-chamfered joists. A deep, stop-chamfered bressumer is present above a splayed fireplace. A stone spiral stair is located to the left, featuring timber treads, and a door recess to an adjoining wall. A plank and moulded muntin partition has been brought forward to the front. An original doorway has a cambered doorhead, with an original door consisting of four broad planks and strap and pintle hinges. Further plank and muntin partitions divide the second unit into two service rooms and a separate end unit. The end unit contains an 18th-century iron grate set into the rear wall. The interior also retains stop-chamfered beams and joists, through-purlin collar and tie beam trusses with splayed feet to the principals, original purlins, a narrow bay over the cross passage, and plank and muntin partitions in the loft over the end room.