The owner or user of any building or structure, lot or land or part thereof, where anything in violation of this chapter shall be placed or shall exist, and any architect, builder, contractor, agent, person or corporation employed in connection therewith and who assists in the commission of such violation shall each be guilty of a separate misdemeanor and upon conviction thereof shall be liable to a minimum fine of at least $100 for each violation up to a maximum of $2,000 or to imprisonment for not more than 90 days, or to both such fines and imprisonment.