Multi-Family property in NYC

[Maneesh Joshi]

Hi all. I am thinking about buying a multi family(duplex) house possibly in Queens to rent out as an investment property. 

Since I am new at this I wanted to see if anyone has experience with multi family houses in New York City. Are there certain things I should look out for in a multi family ? What Do I need to make sure it has from a legal standpoint? I.e. does it have the appropriate permits or is deemed a legal two family?

Additionally I have started to look at neighborhoods like Jamaica, Laurelton, Rosedale and Hollis.   Are there other neighborhoods in Queens that I should look at? I am thinking my budget will be around 750 K.

Thanks all in advance.