Process of Obtaining Permits in New York

[Steve Duffy]

Was wondering the process for obtaining a finished basement permit in Nassau County, New York. Is it required to hire an architect or licensed contractor, or is this something I am able to do myself? Is that typically how people do it, or via an expediter? Not sure what the differences are and the easiest course of action. 

Also, any idea how much this should cost all in for permit, new survey, and hiring someone?

Any direction is appreciated.

Thank you.