This small rectangular church is one of several clustered together at the south-eastern end of a fertile valley at the northern foot of Turlough Hill, sitting within a double enclosure system. An inner enclosure wraps tightly around it, while a larger outer enclosure extends the boundary further. Just nine and a half metres to the east stands a separate nave and chancel church, the two buildings close enough to feel like neighbours sharing a yard rather than independent structures.

The church itself is modest in scale, measuring roughly 7.2 metres east to west and 4.2 metres north to south internally, built from undressed, randomly coursed stone blocks. What is quietly remarkable is that the walls survive to their original height of 2.7 metres, which is uncommon for a structure of this age. The west gable holds a round-headed doorway built from dressed stone running the full thickness of the wall, a deliberate piece of craft set against the rougher rubble construction around it. Inside, light enters through a narrow round-headed window in the east gable and a smaller opening in the south wall. Two aumbries sit side by side in the east wall just below the window; an aumbry is a small recess cut into a wall, typically used in a church to store sacred vessels or books. The north wall has no openings or features of any kind. All the churches at Oughtmama are national monuments in State Care, which at least ensures that what has survived this long will continue to do so.