I have bought one Flat in March 2009 Near Dwarka more which was in Unauthorised colony, which is now regularised. With in only less than four year, the building is so poorly constructed that we have to demolish it, otherwise it will be dangourous for neibours and any person/vehicle moving on that road. Offcourse we had bought it by Power of attornerny. Can we file any case regarding this against the builder. Is there any ways to get compansation from him. Right now he is continuosly in practice to making buildings and selling on Registry (Illegal registry) with loan.