Refinance appraisal question when there aren't any exact comps?

[Nicholas Lohr]

I'm in the process of doing a FULL rehab on two houses that are on one parcel. The houses are not connected at all, they're not even really that close to one another. I've checked pretty thoroughly and I can't find any comps where there are also two houses on one lot in the area. I can find plenty of SFR's and duplexes but nothing quite like mine. My question is will the appraisal come back as a comp to a duplex or will it come back as a comp to two separate nearby SFR's?

I'm obviously hoping it will be the two SFR's! The SFR directly across the street from mine, which is smaller than both of my two, just sold for a higher price than I paid for both of mine.

I'm trying to plan what to expect when I do the refi next year...