NYC Zoning Handbook:
Manufacturing Districts: M2
M2 districts occupy the middle ground between light and heavy industrial
areas. Required performance standards are lower than in M1 districts.
Except when they border on a residential district, more noise and
vibration are allowed in M2 districts, smoke is permitted, and
industrial activities need not be entirely enclosed. The various M2
districts have different floor area ratios and parking and loading
requirements.
M2: Medium manufacturing medium performance
Mainly in older manufacturing areas
M2- 1 FAR: 2.0
Parking: required
Waterfront manufacturing area
M2-2 FAR: 5.0
Parking: required
Located only in Manhattan CBD
M2-3 FAR: 2.0
Parking: not required
Waterfront manufacturing area
M2-4 FAR: 5.0
Parking: not required