Issue of u/s 401 of kmc

Dear Sir, I am Anindita. We do have a residential building in an area of 750 sqft., The problem arise as we were constructing the 2nd floor. Since the road beside the plot is 4 ft. we are not able to get sanction plan for the construction. But some people of our locality complained against us to the local police station and then to the Municipal Corporation and the Municipal corporation issued U/S 401 of KMC. In this concern I am briefing you the reason for which I plan to construct the 2nd floor. My father was an employee of a Private Ltd. Co. In the year 2000 he retired hence he didn't have any pension and our source of income is from house rent. In the year 2007 my father had a severe cerebral attack and was totally parallelised. All of our savings had gone for his treatment and he left us in 2015. Presently my elder sister is claiming for her portion of property. Our house is two stored. The ground floor is rented from which we get our income and we stay in the 1st floor. Now the problem is this that if we divide the property and give the portion of my sister then we don't have any source of income to living. Hence I planned to construct the 2nd floor and then divide the property so that atleast we could rent the ground floor for our living. Hence I would request to you kindly suggest and guide me how to proceed against the KMC and local police. Thanking You. Anindita Adhikary