All the above answers are really true and great but i can suggest you if you are looking for builders in Jaipur then Unique Dream Builders is one of the top builders and take care all the requirements of the their clients.
It depends on lots of factors. There are many companies in the real estate sector with good brand name like DLF,Godrej Properties, Unitech group. But does having a good brand name mean necessarily trust and reputation?
Of most players in the real estate sectors in India many are less than a decade old and for something as intangible as trust and buyer confidence and in sector like Real Estate, its very difficult to assign any ranking.