How much do bank appraisers rely on county recorded appraisal?

[Allen L.]

Hi guys,

I found a owner financing deal where listing price is double the 2018 county appraisal. I think even with a lower offer, my lower offer price would still be 68% higher than county's, whereas Zillow shows that homes in that area sell for 21% higher than county appraisal. I am looking to add a bedroom to make it a 3/1 from a 2/1. The sellers are interested in owner financing but they want a quick cash out refi probably within a year. I can do that, but don't want any surprises if a bank appraiser relies heavily on the county record for pricing and therefore leaves me out with a lower appraisal. Homes in that area sell for roughly what I want to offer on it so I think it's a reasonable price so the issue is the lower than normal county appraisal.