Comping a property being rehabbed?

[Tyler Meade]

I have an appointment coming up with an investor who is tired of fixing up a property that was bought as a flip. Him and his son got this property together for the son to get his feet wet in real estate. They’ve owned it just for over a year now and the house is still in the middle of being rehabbed. How would i go about comping this property with it still not completed? Would i just subtract out the repairs they’ve already done to the house from the initial repair cost they’ve came up with before purchasing? Or just calculate repairs as the house would need a full rehab?