Question about GC's fee in the Bay area.

[John Choi]

The construction cost has been soaring in the last 3 years in the Bay area (I work in the corporate construction industry and our project management office is forecasting 10% escalation in all of the MEP trades in this year). I am wondering how much average GC's mark-up is in small residential market in the bay area in these days? In other words, how much do you expect to pay when you hire a GC for the full rehab project?

Your answer is appreciated. 

Thank you