ARV and FMV - adjusting comps prices

[James M.]

Hey BPers, I’ve got another question for you all. I’ve been working through educating myself more and more on how to use comps to determine FMV and ARV, and I think from face value i understand comparing all the bones of comps such as bed rooms, size, year, condition, garages, location, etc etc. My subject property is a top/bottom duplex where the garage is behind the building which I believe is less desirable. Furthermore the way you have to enter the units via a stair case in front is also less desirable than some of the comps. While my subject property on paper has all the same basic features as some comps, like I said I think the comps are more desirable in the way the garages are placed, and the entrance to the units. So how do I go about puttting a value on this type of thing? Thanks guys!