I am not a lawyer, and this is not legal advice, but because of the square footage discrepancy, you should be able to get your deposit back.  

A good rule of thumb is that if there is any discrepancy between a written document that you have signed and someone's verbal representation the signed, written document will rule.

Explaining the Loan Process - Mortgage UnderwritingPlease note: Slight discrepancies in this process may occur as lenders may designate responsibilities differently among loan processors and underwriters.Your mortgage application will pass from the hands of the loan processor to the desk of the underwriter.

There is some fancy financing to cover the difference, seller financed over 12 months half the discrepancy and I brought cash to the table for the other half and had included in the closing docs/cost.

@Mike Selander The discrepancy might be that if the property is in fact bank owned and being auctioned off, Zillow might show the original bid for the auction, and Realtor.com might show what the list price is for the property.

If there's a discrepancy it's probably because of school taxes and MUD taxes.

Could be a data entry error that caused the discrepancy.

If you have experience working with a lot of appraisers there is a huge discrepancy in valuations they come up with depending on how skilled they are in finding applicable comps. 

If you were to buy a new place, you would be paying property taxes at the fair market value of that property, which sometimes can account for a big discrepancy and jump in property taxes that you didn't foresee or account for.

If you were to buy a new place, you would be paying property taxes at the fair market value of that property, which sometimes can account for a big discrepancy and jump in property taxes that you didn't foresee or account for.