Amir Korangu and Eric Brody dive deeper into the J-51 tax debate, a property tax exemption and abatement for renovating residential apartment buildings, on the latest "Hey, Did You Hear?" The new J-51 program applies to condos and co-ops with an assessed valuation of less than $45,000 per unit, which is a slight increase from the old J-51, but still severely limits eligibility.