Tynyllwyn

Tynyllwyn is a two-storey house with attic, built on a sloping site. It comprises a main range oriented north-south with lower east and west wings, forming a cruciform plan. The original house occupied the north, uphill, end of the main range.

The building is constructed of limewashed rubble stone walls with a pronounced batter and a projecting stone plinth at the downhill end, with stone tile roofs. At the south end stands a stone stack engraved with the date 1649 below two detached diagonal shafts. In the centre of the main range is a 19th-century ridge stack, replacing an original 16th-century stack. The south gable end has windows left of centre, renewed in earlier openings with hood mould to the lower storey. In the right side wall is a three-light casement in the upper storey with a window below, renewed in earlier openings.

The east wing has a 20th-century ribbed and boarded door with stop-chamfer surround facing south, and a three-light casement to the upper right with renewed wooden ovolo mullions. The gable end has a corbelled first-floor stack. To the right in the upper storey is a small opening, now boarded, with drip stone. In the lower storey are a blocked doorway with drip stone to the right and a four-light window to the left with renewed diamond mullions and minor stanchions.

Beyond the wing, the main range has a casement lower left in an earlier opening lighting the hall, and a four-light window with diamond mullions and minor stanchions to the service room. The upper storey has two similar diamond mullion windows, renewed to the left. The north gable end is built into the bank and has two attic windows with diamond mullions and minor wooden stanchions, under hood mould to the left with renewed mullions to the right. The west side wall has a similar three-light window to the service room lower left, a two-light casement to the hall lower right, with a small two-light diamond-mullion stair light at the right end. In the upper storey is a four-light window offset to the right, also with diamond mullions and minor stanchions.

The west wing has a single-storey stable projection against the gable end, built into the bank on the north side, of rubble stone with stone tile roof to the south slope and corrugated iron to the north slope. In its south wall is a boarded door to the left; in its gable end is a window with diamond mullions and drip stone. Above the stable, the west wing gable end has a narrow opening beneath the apex lighting the attic stair, and a window offset to the left in the upper storey. In the side wall facing south is a 20th-century ribbed and boarded door in an earlier opening, with a casement to the left. The left side wall of the main range has a blocked doorway and window above it.

The principal elements of the two main phases—late 16th century and 1649—are substantially intact. The cross passage survives between the wings and has Tudor-headed doorways with stop-chamfer surrounds and boarded doors with strap hinges. The hall has a 16th-century fireplace with a timber lintel and stone fireplace stair. A post-and-panel partition has two Tudor-headed doorways, with a planked door to the right. In the hall are cross beams with stepped stops and similarly chamfered joists. The parlour has an original timber window seat; other window seats are renewed.

At the south end of the main range is the kitchen of 1649, which has a fireplace with a timber lintel carved with stylised foliage and a possible gryphon. To the right of the fireplace is a window seat. Cross beams have run-out stops. The wings both have cross beams with stepped stops.

At first-floor level is a Tudor-headed doorway to the downhill end above the kitchen, where a boarded and ribbed door opens to an attic stone stair housed in the west wing. At the south end is a reset fireplace stone lintel with a triangular head and cambered soffit, engraved with a fleur-de-lys. At the uphill end, above the hall, is a straight stone stair against the north gable end to the attic. The roof is of collar-beam construction.