Mitchel Flaherty, a broker for B6 Real Estate, is expecting tough times ahead as the 421-a tax abatement is set to expire on June 15 without an immediate replacement in sight. “Fewer properties are going to be trading hands as developers try to figure out their next steps,” Flaherty told the New York Business Journal. “It’s just too expensive for many developers to develop without the 421-a abatement.”