Adjacent property questions

[Leo Apostol]

The property adjacent to my own consists of a driveway and garage. I'm my mind there would be many benefits to owning it. A few questions. Is it true if I do purchase it in my name, the two adjacent lots become one lot? Is this better or worse re: property taxes?  How do you value a property like this? What would be the mortgage process? Would a bank even consider getting into something like this?