City hall would have this info as well as the current mailing address for the bank (the mailing address may just be for the tax bills, but its a step in the right direction) Check with the assessors office first.
The best way is to contact your favorite real estate professional. They are are happy ot help and are trained to find these answers for you and can help with the steps to follow should you choose to pursue a purchase.
In California you would go to the recorder's office to do a search of the property records. If the property is listed for sale, you could simply contact the listing agent as well. Getting someone at the bank to talk to you is another matter!