As stated in a previous article, sprinkler requirements under the 2014 Code are not retroactive for any existing building, except for those classified as high-rise office buildings. But major alterations, such as the one you have described, and building use changes can trigger a sprinkler requirement in altered areas.
Without knowing all the specific details of your project, one possible exception that could apply to your case is under BC 903.2.8:
"An automatic sprinkler system shall not be required in detached one- and two-family dwellings and multiple single-family dwellings (townhouses), provided that such structures are not more than three stories above grade plane in height and have separate means of egress."
"Grade plane" here refers to a reference plane representing the level of the curb measured at the center of the front of the building. Because you say your home is only two above-ground floors, it may fall under this exception.
For a more comprehensive review of your specific case, feel free to contact the experts at Outsource Consultants for direct consultation
The 2022 NYC Building Code went into effect on November 7, 2022.
The NYC Department of Buildings has recently released further details on its parking garage inspection requirements.