Wells Fargo Bank was sued because it allegedly represented to Randall Newman that his property would be treated as a two-family, rather than a one-family, home for financing purposes.
But neither the New York County Supreme Court nor the Appellate Division, First Department, lent any credence to Newman's arguments, and dismissed his case. Apparently, Newman's "fraudulent misrepresentation" claim was contradicted by the terms of his mortgage commitment letter. And as for his "detrimental reliance" on the bank's inflated appraisal of his home, the AD1 thought such reports were "matters of opinion," and weren't legally actionable.
Damn! 
To view a copy of the Appellate Division's decision, please use this link: Newman v Wells Fargo Bank, N.A.