We bought a house on a private road and were told the road itself would be completed when three other houses had been built. There’s no sign of the road being made up, but the builder says he will file for bankruptcy if we take the matter further.
It’s very common in these circumstances for the builder to lodge a bond or deposit with the council to ensure that the road is built even if the builder gets into difficulty. Check with your solicitor to see if any such arrangement was made. At the very least you should have arranged to withhold some of the money you paid for your house until the road was completed, and your solicitor may be liable if he gave you no advice about this.