Cae'r Berllan, Bethesda comprises of twelve single storey two-room cottages in a terrace situated 600m south of the centre of Bethesda. They were built in the mid-19th century from rubble stone for slate workers. The whole terrace is Grade II listed because it is the best surviving row of typical single storey quarry-workers houses in the region.
Source: CADW (reference number 18413 for house no. 12)