Rehabbing Questions

[Ali Shah]

I am not a rehabber, but as a rule of thumb, when some one is looking at to buy and then rehab and flip is there a specific $ amount per sq ft they calculate in or ever 100 ft??

lets say the house is 1000 sq ft, is it a general rule of thumb to say $3 per every 100 sq ft worth work calculated in their #'s?

Just curious. I appreciate all your feed back.