1. From the local collectorate office you can get all the necessary information regarding the survey number and also as regards an acquisition of govt. over the land.
2. Do get all the title deeds supplied by the builder checked by a local lawyer,. it is very much essentials since necessary documents varies form project to project, city to city.
3. Sanctioning of building plan from the local municipality is another important aspect to look inot/
4. That apart normal property search from local registration office is also necessary.
5. Do not take chance by the name of the builder. Remove any doubt over the land and project by engaging a lawyer and getting him checked all the relevant documents.