1. Verify from the local municipal Corporation whether they have taken building construction plan sanctioned or not and if yes, then collect the copy of the said sanction plan.
2. On receipt of the said sanction plan, verify whether they have constructed the building as per the sanctioned plan or not. If the sanction is for 2 floors (say) and they have constructed 3 floors then certainly it is a deviation from the sanction.
3. In case of deviation, report the matter to the local Municipal corporation and police urging them to demolish the deviated construction which is causing extreme miseries to you, at the earliest.
4. If they fail to demolish the same, file a Writ Petition immediately against the Corporation and police for their inaction praying for a direction upon them for early demolition of the said deviated portion.
5. If you find that the Corporation has sanctioned the plan which is against the rule causing problem for you, then also you can file W.P. against the Corporation praying for a direction upon them for amending the said sanction and to arrange for demolishing the portion deviated from the amended sanction.