II1 Concrete Cottages Located at the S end of Tregynon village, approximately 100m E of entrance to Gregynog Estate.
II2 Concrete Cottages Located at the S end of Tregynon village, approximately 100m E of entrance to Gregynog Estate.
IIBridge in Parkland Located approximately 200m SW of Gregynog Hall within a wooded area of parkland and carries a footpath over a drive leading to the W entrance to the grounds of Gregynog Hall.
IIBron Rhys On the N side of the B4389 Tregynon to Bettws Cedewain road approximately 1km SE of Tregynon church. The house is reached by a short farm road and is behind a modern farmhouse.
IICefnllydan Isolated farmhouse to W of Gregynog, approximately 3.6km SW of parish church. The house is reached by a short farm road on W side of Bwlch-y-fridd to Adfa road. It faces S on to a garden, with farm
IIChurch Cottage Backs on to E side of churchyard, and set back slightly from the road through the village.
IIChurch of St Cynon Located on raised ground on W side of village, overlooking Bechan valley. The church is sited in a churchyard with rubble retaining wall to S.
IIDolymelinau Farm Buildings Located approximately 0.8km N of parish church on the corner of a junction of 2 minor roads. The farm buildings form 2 sides of the farmyard.
IIFir House Located at the end of a farm road on S side of a minor road between Tregynon and Bwlch-y-fridd, approximately 2.9km SW of parish church.
IIFountain (north-east) Located within the gardens of Gregynog Hall, immediately in front of the house.
IIFountain (south-west) Located within the gardens of Gregynog Hall, immediately in front of the house.
IIGarden Bridge Located in front of Gregynog Hall and spanning a sunken garden.
II*Gregynog Hall 1.7km SW of parish church, in a large area of parkland and gardens. The house faces roughly SE.
IIGwaentrebeddau Isolated farmhouse reached by a farm road on N side of a minor road between Tregynon and Bettws Cedewain, approximately 1.8km E of parish church. The house has farm buildings to W.
IIMiddle Lodge Located within the grounds of Gregynog Hall, approximately 0.4km E of Gregynog Hall, on N side of a driveway leading to Tregynon.
IISawmill Lodge Located on the N side of the E entrance of Gregynog Hall, close to the junction with the B4389 through Tregynon, and approximately 0.4km S of parish church.
IIThe School House Located on N side of the road leading SW from parish church and approximately 70m from the church. The house is set back from the road, with the school immediately to the E.
IITregynon School Located 50m SW of parish church at a junction of 2 minor roads opposite Church House Farm. Set within a playground walled in concrete on the S and E sides and bounded by the School House on the W sid
IITregynon School Boundary Wall Located at a junction of 2 minor roads 50m SW of parish church. The wall forms the S and E boundary of the school, and extends W to the front of the School House.
IITy'n y Bryn Farm Buildings On the E side of a minor road between Tregynon and Newtown, approximately 1km S of parish church. Reached by a short farm road, the farm buildings are on the N side of the farmhouse.
IITy'n y Bryn Farmhouse On the E side of a minor road between Tregynon and Newtown, approximately 1km S of parish church, and reached by a short farm road.
IIWood Cottage In an isolated position on the edge of Gregynog Great Wood, half a kilometre west of Gregynog Hall.