Finding a good contractor

[Tzvi Balsam]

I am having such A hard time to find a reliable contractor someone I feel I can trust in Bayonne NJ.

I just bought a 2 Unit building that I am trying to add a 3rd Unit in the basement it is raw,  The city requires 7 feet so the job will include digging down 6 Inches and I will have to split up the Utility's heat and electric... 

I am trying craigslist I am trying homeadvisor and I feel so lost.

What are the most important things I should look for in a contractor, and what are the most important questions I should ask them before hiring.

Someone please help me with this. 

Thanks in Advance.