When looking for land let the builder do the work and get the builder to source your land.  

This is a good idea because the builder knows where all the estates are and will be able to get you a better deal.  Developers give builders a better deal because they are securing land every day for their clients.  

The builder will be able to work out many features of land that most would not know about and could ultimately save the home buyer a lot of money if they went ahead and bought the wrong block of land.