II*Capel Methodistiaid Calfinaidd The chapel stands E of the centre of the village, with its axis parallel to the main road.
IICapel Seilo, with forecourt walls The village of Porth-y-nant is at the bottom of a narrow valley, NW of Llithfaen. The chapel is at the S end of the eastern terrace surrounding the square, on a platform on the opposite side of the e
IIChurch of St Beuno The church is situated on top of an isolated hill, on the S side of Mynydd Garnguwch, and is reached by footpath from Llwyndyrys.
IChurch of St Beuno The church is set on a sloping site in a narrow valley below the later hamlet of Pistyll, and below the former road line of the Llithfaen to Nefyn road.
IIGwynus The farmhouse lies on the E flank of the small valley running back from Pistyll church, and is reached by a farm road running S off the B4417.
IILleiniau The house is situated on the SW shoulder of Moel Ty-gwyn, overlooking the col of Bwlch Gwynt. It is accessed by a farm track across a field from the farm road to Bwlch Gwynt bach.
IIPenrhos The house stands at the foot of Carreglefain on a road which originally served quarries in the hillside above.
IITrem-y-mynydd, with associated front walls The village of Porth-y-nant lies at the bottom of a narrow valley NW of Llithfaen. The terrace named Trem-y-mynydd forms the N side of the open square.
IITy'n-y-mynydd The building is located at the foot of the southern peak of Carreglefain, on the col between Carreglefain and Moel Ty-gwyn. It is reached by a farm road from Bwlch Gwynt.
IIY Plas, with associated garden and driveway walls Porth-y-nant is set at the bottom of the steep valley opening to the sea, 1.69km NW of Llithfaen. Y Plas is at the western end of the N range of houses, and is approached by a walled driveway below t