GC Cost + Percentage

[Avrohom New]

Dear fellow Bigger Pockets members,

Finalizing a renovation of a 90 yr old apartment building. Feel most comfortable with a Cost + job with my GC as it allows me to get multiple bids for each line item and to review them and beat down the price etc. GC has a great reputation but I am unsure of his Cost + rate.

What is a fair Cost + percentage for a GC to charge on a $1M+ Project renovation in SE Florida Market?