Since it is a multi-unit you may also want to see if there is an outstanding Housing Court case, any open violations or an AH lien.
Broker- prudential rubloff
So, the comparable properties really greatly influence the appraisal amount. If you are not in a market with a lot of sales or if your property is very unique, this can skew the numbers a bit.
You can negotiate their rate though and sometimes you can reduce the services provide or the amount of reporting they need to give you in order to negotiate a better price.