Lifting of existing building with NO common wall.

Hi Sir/mam,nWe are residing in individual house. Our neighbor who has not left space surrounding their house. We have one wall which is their wall and we did not construct wall because it was not necessary as they did not leave space in their land. But we have left spaces on all sides. Now they are saying they want to lift their building with jockey which is a latest technology and they are saying they need only 1inch space to lift without damaging our property. But we are having safety issue to our house as if they are going to work there will be a gap below and anyone can come inside our house as we dont have our wall and they are saying they will cut some of our ceiling and they will rectify and construct it again after the work but while lifting if incase there is a problem and their building falls or touches our building then it will damage our ceiling and health of our building. We are showing objection considering all these hassle. What is the going forward law for this?