General Contractor recommendations - Contra Costa/Alameda counties

Hello all,

I found a SFR REO property that looks like it was gutted completely for a renovation with the interior stripped down to the studs and may require some plumbing and electrical. I am thinking of rehabbing this property and I was wondering if anyone has recommendations for a reliable general contractor in the Contra Costa county in California? I could try searching for a contractor on my own but if there is anyone who has used a contractor in my area, I would prefer to go with the recommendations.

At this point, I need to know how much it would cost to completely rehab the property through a general contractor. Once I have a rough estimate, I can decide whether to proceed with an offer for the property. Is there an easy way to develop the estimate or do I still need to find a GC first to do the estimate? Thanks.