IIArosfa On the E side of the road through Minllyn to Ysgol Gynradd Dinas Mawddwy.
IIBlaen Pennant The house lies at the head of the Dyfi valley, at the foot of the pass over Bwlch y Groes. It is reached by a trackway N from the first bend.
IIBraich-melyn The farmhouse lies on rising ground above Dolobran, and is reached by a continuation of the lane off the N side of the A470 passing Dolobran.
IIBridge W of Pont y Cleifion The bridge is alongside and on the W side of the high level bridge that carries the A470 over the Afon Cleifion, just N of the village of Mallwyd.
IIBrigands Inn The inn is located on the corner of the the A470 Dolgellau to Machynlleth trunk road and the A458 to Welshpool.
II*Bryn Hall The house stands in its own grounds below the main road through the Dyfi valley, approximately 520m N of Llanymawddwy.
IIBuckley Pines Hotel The hotel stands on the roadside at the S end of the main street of Minllyn.
IICefn Coed On the E side of the road through Minllyn to Ysgol Gynradd Dinas Mawddwy.
IIChurch of St Tydecho The church stands in a raised oval churchyard, by the road leading NE through the Cwm Dyfi, NE of Dinas Mawddwy.
II*Church of St Tydecho The church stands at the S end of the village of Mallwyd, by-passed by the present A470.
IIDeunant-mawr The farm lies on the W side of the valley, reached by road from Aber-Cywarch.
IIDolobran Dolobran lies on the NE side of the widening valley of the Afon Cerist, where the valley turns to run in a more southerly direction.
IIDugoed-mawr The farmhouse is uphill sited, on a terrace above the main road between Mallwyd and Welshpool, and is reached by a steeply inclined driveway.
IIFarm building at Gweinion Gweinion lies at the end of a long farm road leading off the N side of the A458, near the roundabout junction with the A470.
IIFarm building at Troed-y-rhiw Treod y-rhiw is against the road leading NE through the upper Dyfi valley. The farm building is adjacent and at right angles to the lower gable end of the farmhouse, across the steep slope of the val
IIFarm building at Wern-gau Wern-gau farm lies on the left bank of the upper Dyfi, above Llanymawddwy. The farm building stands across the farm access road, approximately 30m S of the S gable end of the house.
IIFarm Building to rear of Gesail Towards the head of Cwm Cywarch, on the west side of the valley , northwest of the common beyond Capel Bethlehem. The farm range is immediately behind and up-slope of the house.
IIFfridd The small dwelling is uphill sited on the S flank of Foel-y-fridd, some 80m above the valley bottom road along the Afon Angell.
IIField barn below Ffridd The barn and farm building nestles in a hollow in the steep slope rising to Foel-y-ffridd, below the small farmhouse known as Ffridd.
IIFron-dirion The small farm stands on the steep slope of Foel Benddin, above Dolobran, and is reached by trackways leading up from the old road parallel and above the main road.
IIGarden walls at Tan-y-bwlch The garden walls at Tan-y-bwlch are on the N side of the home farm complex, adjacent to the river.
IIGorphwysfa The two Gorphywysfa cottages stand immediately E of, and face the churchyard, set crosswise to the main street of the village.
IIGweinion The farm is reached by a long roadway commencing from the N side of the A 458 near the roundabout junction with the A470, and running E along the S side of the Cwm Cleifion.
IIGwelfryn On the E side of the road through Minllyn to Ysgol Gynradd Dinas Mawddwy.
IIGwynfa The row of cottages, Nos 1 - 6, form a terrace on the W side of the road leading to Ysgol Gynradd Dinas Mawddwy.
IIIsfryn The row of cottages, Nos 1 - 6, form a terrace on the W side of the road leading to Ysgol Gynradd Dinas Mawddwy.
IILlanerch Llanerch in the centre of the upper Dyfi valley, below the road running along the NW side of the valley from Cwm Cywarch to Llanymawddwy.
IILlys Gwalia The row of cottages, Nos 1 - 6, form a terrace on the W side of the road leading to Ysgol Gynradd Dinas Mawddwy.
IIMerion House The row of cottages, Nos 1 - 6, form a terrace on the W side of the road leading to Ysgol Gynradd Dinas Mawddwy.
IIMilepost The milepost is set in the NE verge of the old turnpike road from Mallwyd to Dolgellau, approximately 15m from the line of the present A470 SE of Pont Cerist.
IIMilestone The milestone stands in the grass verge on the N side of the main road, near the access drive to Dugoed Bach farm.
IIMynogau-isaf The building stands on a road formerly leading from Dinas Mawddwy W to Bwlch Oerddrws, later to be replaced by the present A470.
IINo 1 Gorphwysfa The two Gorphwysfa cottages stand immediately E of and facing the churchyard, crosswise to the main street.
IIPandy at Dolobran The pandy stands below and to the W of Dolobran farmhouse, in the valley bottom against the Afon Cerist.
IIPen-y-graean The two cottages, Tan-y-graean and Pen-y-graean to the N are set above the main road through the valley, S of the centre of the village.
IIPont Dol-y-Bont The bridge carries the road from the T junction at the N end of the village of Dinas Mawddwy leading to Cwm Cywarch and Llanymawddwy.
IIPont Minllyn The bridge crosses the Afon Dyfi a little to the SW of the modern bridge carrying the A470 to the N.
IIPont Nant-yr-ehedydd The bridge takes a hairpin bend of the A458 Mallwyd to Welshpool trunk road over the ravine of the Afon Clywedog, near its junction with the Afon Dugoed.
IIPont Wrysgen The bridge carries the main A458 Mallwyd to Welshpool Road over the Afon Cleifion, SW of Cwm Cewydd.
IIRhydyfelin, formerly known as 1 Wyle Cop The house stands in a row of houses, on the cross road at the N end of the village, and near the corner and facing N over the former ground of Plas Dinas.
IISarn-newydd The building stands on the E side of the road running NW-SE through Cwm Cywarch.
IITan-y-bwlch Farmhouse The farm lies on a level platform in the valley bottom directly E of Dinas Mawddwy, and is reached by a long drive along the E side of the river from its junction with the main A470 at Minllyn.
IITan-y-graean The two cottages, Tan-y-graean and the adjoining cottage to the N are situated above and on the E side of the main road through the valley, opposite Ty-isaf, south of the centre of Llanymawddwy.
IITrigfan On the E side of the road through Minllyn to Ysgol Gynradd Dinas Mawddwy.
IITroed-y-rhiw The farm lies within the Dyfi valley, NE of Dinas Mawddwy, beside the road running along the SW side of the valley.
IITy Gwyn The row of cottages, Nos 1 - 6, form a terrace on the W side of the road leading to Ysgol Gynradd Dinas Mawddwy.
IITy'n y Twll The house stands in a slightly elevated position near the head of the Cwm Cywarch, facing over to the W.
IITy'n-y-ddol The house stands by the main valley road, just N of Pont y Pennant, and opposite the turn to Cerddin farm.
IITy'n-y-ffordd The cottage lies alongside the main road through the valley on the right bank of the Afon Dyfi, approximately 1200m from the Aber Cywarth road junction.
IITy-isaf The building fronts the main N-S road through the valley on the E side, just S of the village centre of Llanymawddwy.
IITy-uchaf The house stands just beyond the SW side of the churchyard, fronting the main road running along the NW side of the Dyfi valley.
IITydecho On the E side of the road through Minllyn to Ysgol Gynradd Dinas Mawddwy.
IIWern-gau The farm is located on the SE side of the upper Dyfi valley, and is reached by a trackway from Pont-y-pumryd on the main valley road N of Llanymawddwy.