Hello Everyone, 

I am looking at a property in Queens, NY that has the potential to be converted from a 2-Family Home into a 3-Family home by converting the basement into a legal dwelling. Basement has 2 entrances (Front and Back) and is half way above curb. 

What would be the estimated cost in getting a new certificate of occupancy? 

Might have to ask a local GC about that one.

Hey @Isai Turcios the price will differ based on location and property. If you want an exact estimate the person you would want to contact is an Architect. Along with getting a new c/o there will be filing fees involved with the DOB and any possible permits the contractor may have to pull. Good luck with the conversion !

I was checking around about 12 or so years ago, and estimates I got at the time range from $12K to 15K. Could run more as I already have a full bath and plumbing for kitchen. 

The problem in my area is getting a variance. I also owned a 3 family that was originally built as a 2 family. According to people I talk to, 2 families are built to a different standard than 3, chief differences include a cement wall surrounding the furnace room and fire escapes.

I suggest you check first if a variance is needed before preparing plans. Around here, variances require public hearings, and the zoning board never approved any due to the opposition of the local homeowners association. 

Account Closed thank you guys so much for your responses I really appreciate them! I will be speaking to an architect very soon.