Municipal Corporation Of Greater Hyderabad — Encroachment of plot by GHMC road

Hi
My father owns a plot in Hyderabad. It is a vacant plot. We have sale deed with plot layout which clearly shows the plot and its adjoining details. Two sides of the plot are bordered by GHMC road. During road layout work, 2.5 feet of the road encroached on our plot ( it is a 20 ft road). Now we are unable to construct a border wall on the plot since our colony association says if we construct a wall we cannot build it on the road though the 2.5 feet of the road is part of our property. What can we do in this case?