The church consists of chancel, nave, south porch, and western tower containing one bell.  The edifice was rebuilt in 1849, but no drawings of the structure prior to the restoration have been located.  The 1849 work installed the Norman outer arch of the south porch, the pseudo-Norman chancel arch, and the east window.  The church was reopened for divine service on the 6^th September 1849.  The image in the banner above was drawn by A. F. Rolfe in 1849, presumably to celebrate the church's reopening following its remodeling.

The church underwent further restoration in 1902, which included repairs to the tower, the addition of a vestry on the north side of the chancel, the laying down of wood-block flooring, reseating the nave, erecting a glazed screen to the tower arch, the insertion of a new three-light window in the south wall of the nave, and general repairs to the whole fabric of the church.  The cost of restoration amounted to £350. The contractors were Messrs. Harries and Davies of Cardiff.  Additional work was completed in 1902 by G. E. Halliday.  The church was reopened for divine service after restoration on Thursday 6^th March 1902, by the venerable F. W. Edmondes, Archdeacon of Llandaff, a former rector of St Bride's (1867-1873).  At the present time, the building needs further restoration so that it can continue to serve the parish.

Chancel

The chancel arch is a replica of the original Norman work and was placed in the church in the restoration of 1849.  It is a plain, semicircular arch of two orders with simple square spots beneath a plain moulding to the edge of the outer arch.  The square abacus from which the arch springs has a continuous band of star ornament -- a widely used 12^th-century motif.  On either side an engaged column is let into the wall; it has barely scalloped capitals above a single roll.

Altar

Carvings on the pulpit and altar complement these designs and echo the style of the east window lights above the altar.

The chancel is lit on the south side by a single light with cinquefoiled head.  The window depicts the figure of St. Brigid, the patron saint of the church, holding a crosier in her hand.  It was erected as a memorial to the Reverend David Jenkins, rector of the parish (1909-1949), and his wife Minnie Jenkins, by their daughters in 1954, in accordance with a design by Hubert Thomas of Celtic Studios, Swansea.

Priest's Door

The south wall of the chancel contains a priest's door with four-centred arch.  The south wall holds a memorial tablet in Penarth alabaster surmounted by a coat-of-arms with four quarterings, each containing a lion rampant.  The tablet commemorates Captain William Jones (d. 1658) and his sons, William (d. 1648) and Robert (d. 1650).

The north wall of the chancel contains a brass plaque that serves as a memorial to those men of the parish who fell in the Great War, 1914-1918.  A doorway with four-centred arch leads to a modern vestry on the north side of the chancel.

The east window, canopy, and niche, were brought from the chapel of Llanfair Fawr at Sant-y-Nyll when that chapel was demolished in 1849.  An extract from the Gentleman's Magazine reads:

"The chapel of Llanvair Vawr (St. Mary) stood one mile to the south of Llaniltern Chapel, near the turnpike road leading from Cardiff to the town of Llantrisant, and distant about six miles from the former place.

The history of this edifice is involved in the utmost obscurity, as is that of a small mansion house situated to the east of it, in a stile not older than James the First reign.  The property belongs to the Hon. R. H. Clive, M. P. in right of his wife the Lady Harriet, sister of the Earl of Plymouth of Saint Fagin's Castle in this neighbourhood.  Rees, in his Essay on the Welsh Saints, notices the chapel.

The sketches from which the accompanying glyphographs were made, represent the fabric as it appeared six years ago.  Unfortunately it has been subsequently demolished.  A representation made by a neighbouring antiquarian to Mr. Clive never reaching its destination, a circumstance which is regretted by the proprietor.

The chancel was 21ft. 9in. long within; the nave (part of which appears to the left of the buttresses) was 20 feet long.  The breadth on either side of the perpendicular east window was 5ft. 3in.  The south window was in the decorated style.  The cross wall separating the nave from the chancel was 2ft. 8in. thick, and there was a low romanesque arch devoid of mouldings which formed the western entrance to the nave.  The oak roof of the chancel was in good preservation, and had been of late covered with thatch, the building having been desecrated by its conversion into a cow-house.  Portions of the east window, the canopy over the altar, and other stone work have been preserved, and will be used in some projected repairs in the neighbouring church of St Brides-super Ely; the workmanship is of superior character. J.M.T."