A nave and chancel church, the nave measuring 9.90m x 7.01m, the chancel 7.32m x 5.18m. A Romanesque W doorway, much altered, survives. The chancel arch has been partly blocked but the original Romanesque jambs and carved imposts survive.

Monastery founded by St. Fiachra (d.670) (Gwynn & Hadcock, 1970).

The chevron on the portal arches at Ullard finds its closest comparison at Freshford, although it appears rougher owing to the use of granite. The imposts with pellet ornament on the chamfer are also similar to Freshford. Human heads are a common feature in Irish Romanesque; they are used on the keystone of arches at Freshford, Killeshin (Laois), Clonkeen (Limerick), Kilmore (Cavan), St Caiman's, Iniscealtra (Clare), and the N porch at Cormac's Chapel; and on the angles of capitals at Freshford, Killeshin, Kilmore, Kilteel, Dysert O'Dea, St Saviour's Glendalough, and Annaghdown. The figurative panel over the W window is probably reused in this position.