A Sydney real estate agent who embezzled hundreds of thousands of dollars from renters' bonds and trust accounts to make bets on sports has been jailed for 18 months.

The door closed on Tuesday for 29-year-old Panania property manager Mark Kolodynski to appeal against an 18-month jail sentence for stealing $370,000 from trust accounts of two real estate agents.

Mark Kolodynski (pictured in fancy dress) pleaded guilty.

Details released by the state government show the former property manager systemically and unlawfully withdrew money for his own purposes from trust accounts held by real estate agents Northern Strata Management Services and Bevans Wollongong for customers.

A NSW Fair Trading investigation followed a trail of money that ultimately led to Kolodynski's personal gambling account at the TAB.