The building that can be seen today bares little resemblance to the church built by Davidson circa 1600. The only visible parts of his church are the bell tower and part of the South wall which although covered by rendering has underneath, good ashlar masonry which dates to that period.

The church as it is today dates largely from the rebuilding of the church carried out at the latter part of the 18th century. (1774) The entrance to the original church is believed to have been in the north face of the building although today no trace can be found.

As can be seen from the line drawing made during he 19th century there were in fact two transept like buildings on the south wall of which only the Prestongrange Loft remains. This contained the family pew in its upper half whilst the lower half was the family vault. Today it contains the pipes for the church organ. The other transept was the porch which had a room or vestry above the door and a sun dial on its south-west corner.The porch was removed during the 1891 renovations and all that remains of this building is its outline on the south wall and the bricked up entrance to the main building. During this renovation the north wing was added.

The building at the south side of the tower contains the staircase to the upper galleries and to the clock tower and although a much later building than the tower itself it is very probably a reconstruction of the original staircase which led to the tower.

The present vestry and choir room were added after a fire destroyed the vestry which led from the west vestibule. (January 1975)

The only other building of note is that of the old session house which is at the front gate of the church. The wood panelling on the west wall depicts the names of old residents of the parish and shows the sums bequeathed by them for the benefit of the poor.

(this is explained further in Peter McNeill's Prestonpans and Vicinity )