Balfarg henge is uniquely situated in the centre of a housing estate, surrounded by a circular road and ring of houses which were built in 1977 and 1978.
Excavation prior to the construction work revealed much about the site, although it had been damaged over the years by natural erosion and ploughing. Originally there was a circle of timber posts measuring 25m in diameter, surrounded by a ditch enclosing the space. The ditch is clearly visible today, and replica posts have been erected to show the original timbers’ positions.
There is evidence to suggest that two concentric stone circles existed on the site, possibly later than the timber circle. Of those, only one two stones remain – one from the circle itself, and one which was one of a pair flanking the entrance across the ditch to the west.
The circle stone measures 1.60m in height and is wide and squat in stature, while the portal stone is taller and narrower and measures 2.01m in height.