Dear client,
Sorry to hear about your situation. Property rights and building codes are controlled by housing society bylaws and local municipal laws. Although it's a good idea to work with the society, you are usually not needed to provide any more paperwork than what is necessary by law. The Real Estate (Regulation and Development) Act, 2016 (RERA), which describes the rights and responsibilities of both builders and buyers, is a legal resource that you can consult. Your development should be regarded as lawful if it follows the original building design and has municipal approval. Under the Co-operative Societies Act, you may pursue legal recourse if members of the society harass or hinder you. The Maharashtra Co-operative Societies Act, for instance, forbids deliberate hindrance of legally permitted operations when it comes to section 91.
Hope this helps you.