IMD stands for Interim Multiple Dwelling.

An Interim Multiple Dwelling is a building which:

1. Possesses no residential certificate of occupancy pursuant to §301 of the Multiple Dwelling Law;

2. Was used in the past for manufacturing, commercial or warehousing purposes

3. Had three or more residential tenants living in separate apartments in the building in the 20-month period between April 1, 1980, and December 1, 1981 (the "statutory window period").

See the NYC Loft Board Website and Permitspace Entry regarding IMD's for more information. Also, refer to Article 7-C of the Multiple Dwelling Law.