When do you need a C of O?

I own a brownstone in Brooklyn that’s legally a 2-family but does not have a Certificate of Occupancy on file with the buildings department. (Apparently many older buildings don’t.) We want to renovate to change the configuration of the 2 apartments, but still keep it as a 2-family. Do we need to apply for a C of O, or can we do the renovations without it? I’d love to avoid the hassle and expense of getting one if we don’t need it. Anyone know if we can do that?

By Brooklynite |