What is your version of "due diligence"

[Ally Kumar]

Would like to learn what is involved in "DD" for vacant or tenant occupied single or multifamily properties. I know its a basic question but are there variations of DD? To what extent experienced investors go in terms of DD? Different DD for single vs multifamily? What resources can one use? I know the basics of DD involve checking property records, permits, flood zone etc. but would like to learn more about DD.