Bank Shot by Donald Westlake (1972) Simon & Schuster

A Dortmunder caper where the crew steals the bank.  A local bank is rebuilding their headquarters and has put a mobile office across the street in an empty lot to service their customers.  The wheels and axles have been removed and the temporary building set on blocks.  Once a week they get the payroll and have extra guards.  The question is how the gang can steal the bank and then leisurely break into the vault.  Of course, nothing goes right for the gang, or for the police.  Hilarity and irony take the day.