urban land ceiling or N.O.C

Sir, My father owns a land some 20 years ago and now as the area got developed our land becomes a junction point of two lane "L" shape( small, say 15 feet lane), thought legally there is no way from one side to other even in govt record...!!! few years back there used to be a wall which slowly vanishes with time and now it becomes a way....!!! am from Yakutpura, Hyderabad. we are even paying the taxes of our Plot....!!! its a registered one...!! now when we are trying to cover it with a boundary wall, criminal guys of our locality are objecting, even they also know that their is no way for other lane people ...!!!(they have other alternate lanes) when police came they are asking us take permission of construction. please guide us what to do...??? some body is saying all the area of old city will come under urban land ceiling and we cant get permission of construction...!!! as it is old city there is no legal and illegal. people construct in a way they want...!!! how to know whether our land is under ULC..?? if in case it is what should be our next step..?? if not then what..?? Please help us.... we have no source of information....