Here is the Blog for Blue Row's construction history.

Briefly, Blue Row Cottages were built in 1806. John Powell, the mason, built Blue Row and  may have owned the plot of land in 1802. He certainly had an interest in it from 1806. Burnt House Homestead was just to the east of Blue Row, and its Close extended down to the Griffin. The lane down the church side of the cottages was called Watery Lane (the stream runs under it now). 

The row of originally 4 cottages was built right next to the Church and the Norman Motte and Bailey. The walls comprise two layers of Hornton stone, filled with stone rubble in between. The roofs were blue slate. The front doors of the cottages were on the east side, facing the gardens. (This is the opposite side to the church.) Access to these front doors was via a path that ran straight across the front of all four cottages, there being a gate through the wall at number 1 (nearest the road), There was also access through gates from the path (marked in yellow) at the end of the gardens. This second path, and the lane (blue and green on plan below), had no registered owner but with rights for Blue Row & Old Farm Cottage residents. 

You can find out the full history of the construction over the years, here.