Dartford lies about 18 miles SE of London in former NW Kent. The church of Holy Trinity consists of a nave with aisles, a chancel with N and S chapels and a tower. The lower portion of the tower is Norman, whilst the upper portion dates to the 15thc. The N of St Thomas' chapel dates from about 1220. The remainder of the church can be dated to the 14thc. The W corner of the S aisle of the nave was unfortuntaely cut back in 1792 to widen the High Street. The sole surviving Romanesque material is found in the base of the tower.

Domesday Book records that 'Tarentefort' (Dartford) was part of the lands of William I, and four churches are mentioned there.

The detail on the sculptured block is unusual, and may not neccesarily be in its original location. The church is believed by some to have been built by Bishop Gundulf around 1080, but the evidence for this attribution is not apparent.