If you simply want to use the entire 2 family home for your own family you do not have to do anything other than live in it. If you need to make physical alterations to accommodate your family in a more comfortable way, you need to use licensed contractors and make sure you get the proper permits. There is no way for us to tell you how much this would cost because it depends on what you want to do.
The only thing I will caution you on is this... if you remove one of the kitchens, when you go to sell the house your future buyer may have a problem getting the mortgage because a bank always wants to see two kitchens in a two family house. If the 2 family house has only one kitchen, the bank most likely will refuse to lend until it is corrected.
I would not recommend changing the house legally to a one family, keep the two family status no matter what you do, it will increase your buyer pool when you go to sell the property. If I can be of further assistance, please contact me direct. Good luck!
Mitchell S. Feldman
Associate Broker/ Director of Sales
Madison Estates & Properties, Inc.
Office: (718) 645-1665/ Cell: (917) 805-0783
So why downsize it legally, and give options away down the road. It is much bigger deal to up use a building and should never be done with out legalizing it.
So leave at a two, use it as a one.(remove one of the kitchens etc. and when you come to selling it your buyer will still have the option of using it as a one or two family legally.
The cost of taking out a kitchen and making closets etc. to finish the extra space, call a few contractors after working out what you like.
Kathryn Lilly, Broker
Realty on the Greene, LLC