TJS made assumptions that others disagree with, evidenced by the article from The Appraisal Institute.
You are also entitled to your opinion.
You also totally ignored what TS posted, it seems to me my "assumptions" are not assumptions at all.
"A one- or two-unit property that includes an
illegal additional unit or accessory apartment
(sometimes referred to as a mother-in-law,
mother-daughter, or granny unit).
Yes, provided that:
• The illegal use conforms to the subject
neighborhood and to the market
• The property is appraised based upon its
current use.
• The borrower qualifies for the mortgage
without considering any rental income from
the illegal unit.
• The appraisal must report that the
improvements represent an illegal use.
• The appraisal report must demonstrate
that the improvements are typical for the
market through an analysis of at least three
comparable properties that have the same
illegal use.
• The lender ensures that the existence of the
illegal additional unit will not jeopardize
any future hazard insurance claim that might
need to be filed for the property.