Finishing Basement

I am considering turning my large basement into an apartment for some of my family members to stay in when needed.

I would like to have a small kitchen and bathroom there. How do I go about finishing the basement in a legal manner? Do I need to file with DOB for permission to install a bathroom and a kitchen? Does it take a long time? What if my contractor is my relative who may not have a license. Do I need someone licensed to sign off on the bathroom and kitchen plumbing for it be legal?

Any advice will be appreciated.

Thank you.

By shalman |