Queens, NY - Converting 2 Family to 3 Family

[Andy Savin]

Hello, 

I was looking to convert a B9- two family home into a CO-walkup (3 family) in queens. My neighbor had done his conversion in early 2000’s but he no longer lives there anymore. The home was built in 1925 and has 3 floors plus basement. I plan to hire an architect but really wanted to make the decision to see if it’s worth going that route or just not doing it at all. I know fire escape through the back would need to be put in but does a fire sprinkler System as well? or probably not if there are some grandfathering rules. I’m assuming everything else needs permits but anyone have any estimated time for doing a project like this 1,2,3? Months 

thank you for your responses in advance