It is designated by Cadw as a Grade I listed building,[1] and is under the care of the Friends of Friendless Churches.

Describing the reasons for its Grade I listing, Cadw states it is "a rare example of a medieval church unrestored in the 19th century, so retaining an exceptionally complete set of 18th-century furnishings".

Its plan consists of a nave and a chancel under a single roof, a south transept acting as a chapel, and a north porch.

In the southwest corner of the chancel is an oak pulpit and a reading desk over which is a sounding board.

The seating in the nave, chancel and transept consists of box pews and benches, some of which are inscribed with initials and dates.

An early 19th-century brass candelabrum, a chalice dated 1723, and a silver salver of 1752 which were formerly in the church are now in the care of Bangor Cathedral.

[4] Media related to St Baglan's Church, Llanfaglan at Wikimedia Commons