Liverpool, NY Appraisal Question/Cost per unit?

[Will Chamberlin]

Hi there, we just had an appraisal on a three-family in Liverpool, NY.  The appraiser used a couple of two-fams as comps and added $10K to our value for the additional unit.  That seems a bit low to me, but I'm wondering if anyone has had a recent appraisal in the area and would be willing to share their comps?  I included a picture of the section I'm talking about.  Thanks!