IICroeserw Viaduct Spanning the Afan river approximately 200m E of the centre of Cymmer.
IICymmer Bridge Spanning the Afan river approximately 300m NW of the centre of Cymmer, and carrying an unclassified road from Cymmer to Abercregan and Glyncorrwg.
IICymmer Viaduct Spanning the Afan river approximately 0.5km WNW of the centre of Cymmer.
IIGelli Farm Approximately 1.2km E of Cymmer, on high ground overlooking the Afan valley and reached by farm road on the E side of the A4107 Cymmer to Treorchy road.
IIGelli Farm Cottage Approximately 1.2km E of Cymmer, on high ground overlooking the Afan valley and reached by farm road on the E side of the A4107 Cymmer to Treorchy road.
IIHebron Chapel Prominently sited on high ground at the N end of Cymmer overlooking Avon Street and the river Afan to the S.
IIOld longhouse at Nantyfedw Approximately 1.3km ESE of Cymmer, on high ground overlooking the Afan valley, and reached by farm roads E of A4107 or N of Croeserw.