Hi, Jen
I used to live in Los Feliz, right near Griffith Park, and certainly it is difficult to find reliable, honest, and sometimes legal contractors in the city. I don't know in the manner that you met the 3-4 people you have, but if they aren't referred they may be suspect. I might check online sites that have reviews of the quality and reputability of
Los Angeles roofing contractors, or remodeling, or whatever job that you are in need of; so that you don't get ripped off or have sub-par work done. Good Luck!