I agree with your advice of turning down assignments when warranted... And this forum is a wonderful way to help steer those decisions, gain further competence, & identify what we don't know.
I respectfully disagree with your comment about being a perfect example of someone over their head... that statement is a perfect example of a blanket accusation. You do not know what you do not know.
I am (was) not trying to be condescending. First of all.....
I have been asked to appraise a lot that is currently zoned residential but with a highest & best use as a commercial lot. It is currently listed as a commercial lot and several similar lots in the immediate area have been rezoned from residential to commercial zoning......
If the Highest and Best Use is commercial then you are above your license level.
If the Highest and Best use is commercial then you need a very detailed Highest and Best Use discussion, which will most likely be multiple narrative pages.
I have seen very few multiple page H & B analyses from residential appraisers. But you could be one of the ones who is capable of this.
Secondly, we do not just use a hypothetical (condition) that a property can be rezoned to commercial. You must talk to the zoning folks, building department people, research what the other property owners did to get a different zoning and what the criteria is for getting the rezoning.
Most likely there are different set backs, parking area rules, L/B ratio requirements, building height requirements (limits), specific allowable uses (no naked lady bars, or maybe naked lady bars are permitted) and many other unknowns.
All of this analysis is part of this type of assignment. In this type of assignment I do not know of any folks that I have worked with who have done this on any type of form. This is a narrative report with very specific H & B analysis and not simply just a land appraisal.
......I am convinced my comps should reflect similar HBU as my subject with a hypothetical assumption it could be rezoned from residential to commercial - which is what has been done with my comps......
You are convinced because.....? Are the land sizes similar, frontage.....there are a lot of unanswered questions.
Is H & B for single tenant improvements, multi-tenant improvements, could the Highest and Best Use be for sale to one of the adjoining properties for expansion?
......The hypothetial assumption may pose a risk for the bank, but not me. It allows me to predict it's "market value" based on it's "highest & best use".
Once again it would be a Hypothetical Condition or a Extraordinary Assumption and actually as you are presenting it I would use the latter.
The Extraordinary Assumption would be that the property can be rezoned, A Hypothetical Condition assumes that the zoning does not yet exist but is used for the analysis. Without the Extraordinary Assumption that the property can be rezoned I think the analysis would be dead in the water.
But maybe this is splitting hairs.
......The hypothetial assumption may pose a risk for the bank, but not me. It allows me to predict it's "market value" based on it's "highest & best use".
This statement really is something that should be of concern to your client. You are supposed to give the bank an opinion of value....if they own it tomorrow what can they get for it? You are an agent of the bank.
But good luck on the assignment.