Cathair Deargáin Theas is a univallate rath, meaning a ringfort enclosed by a single bank and ditch, but the ground inside it is crowded with the remains of at least seven hut structures, several of them built directly against the interior face of the enclosing bank. That density of occupation within a single rath is unusual enough to give pause, and the site's position, commanding a broad view across the northern side of the western Dingle Peninsula, suggests it was chosen with some deliberate care.

The huts themselves survive in varying states. One, near the northwestern entrance gap, may have been cut through when the gap was formed; its curved drystone walling is now visible only in two short sections on either side of the opening, and the structure would have measured roughly 3.9 by 3.5 metres internally. A second hut, built against the bank to the southeast, was probably originally circular, around 4.2 metres in diameter, though only the lower southeastern arc of its wall, about half a metre high, remains standing. Two further huts, likely conjoined, abut the eastern bank, their precise form too degraded to measure. The most substantial survivor sits in the southern sector of the enclosure: a circular hut some 6.4 by 6 metres internally, its floor sunk below the surrounding ground level, the wall now largely a spread of collapsed stone with just a short stretch of the outer face still legible at the northeast. Beyond these, there are faint traces of one or two more structures nearby, one reduced to little more than a scatter of displaced stone. The full picture was recorded and described by J. Cuppage in the 1986 Dingle Peninsula archaeological survey, a landmark study of this corner of Kerry that brought dozens of such sites into sharper focus.