When you have seen the house you want to buy, it can be a good idea to go back another time to see it under different weather and/or light conditions.  

On a bright sunny day every house can shine, but seeing how it reacts to rain, snow, wind, and even after sunset can give you a clearer perspective of how it will look and feel when you are living in it.

This is not to discourage you from buying any given house, and the experience if "knowing" that "this is the one" is quite real and would well be honored.  Consider it further fact-finding which will help you plan for any changes you may have in mind once you move in.   

This suggestion would hold with new construction as well as with established houses.