In 1950s, the state carried out a "public-private partnership" for your real estate, which was legally called "social justice reform". After renovation, the house will be rented as a "rental". In the 1990s, the state issued a new policy to return the properties that did not conform to the socialist transformation in the 1950s. Nanjing's handling principle is generally that all houses not exceeding 300 square meters are returned. I estimate that part of your house will be returned. There are several ways to return, such as physical return, price return, and so on! But here is a very bad news. The document of Nanjing Municipal People's Government implementing the policy of 1992 was invalidated in June 2009, and the new document has not been issued!
Now I'll give you some positive answers. 1. The rent cannot be claimed; The old blueprint of the house is invalid because of the change of lease. 3. When the old property owner (your grandfather) dies, the compensation must be notarized. If one of the heirs has different opinions, he must file a lawsuit; 4. The revocation of socialist transformation documents by Xuanwu District Executive Policy Office is the key to this case. .....
Please come to Nanjing Real Estate Trading Center on Huaqiao Road for a detailed answer. As promised, I charge by the time for legal consultation, and the charging standard is very high.