Changing C of O

We are thinking of purchasing a brownstone on a landmarked block in Brooklyn. The C of O states that its a 2 family. However, the current owner has been using the building as a 2 family + doctor’s office for the last 30 years. An application to change the C of O was made in 1993 by the owner but never followed up on so the original C of O stands. What options do we have as potential buyers to change the C of O to 2 family + doctor’s office? Is this something we can do once we buy and if so, what are the steps? Is an LNO an option for us?

By anugupta |