A large austere house in neo-Georgian style, Trearddur Bay is in an elevated position on a rocky promontory, set back from the South West side of Lon Isallt and on the coastline overlooking Porth yr Afon.

The house is set on a large plot that encompasses its own private road, large driveway/parking area, private beach, large field with derelict walled garden and second headland.