Multi family zoning

[Trey Prince]

Can a residential multi family legally function in an area zoned B1? Also what holds more weight ; public records or the last updated property card .. considering purchasing a multi family in a b1 zoned area .. public records deems it a 2 unit but it’s last updated property card deems it a 3 unit. Contacted the building dept but I’m not 100% confident in the records that we’re providing to confirm it was a 3 family.