Average cost to rehab per square foot vs new build costs in MA

[Russell Lavoie]

I'm in the southcoast of Massachusetts. My journey has led me to a point where I'm looking for some numbers on average rehab per square foot, and average cost to new build per square foot.  The closer to my area the better but ill take anyone's  numbers or input in the best place to get those numbers. I'm reaching out to some local contractors but most of them are not tracking their numbers and probably wont put In them time to put together accurate research. So anyhelp is greatly appreciated, thanks in advance you guys are awesome!