While the Americans with Disabilities Act (ADA) permits the installation of a single unisex toilet room in lieu of separate facilities, the 2014 NYC Building Code and Plumbing Code are more stringent. Section 403.2 of the plumbing code requires separate facilities for each sex when the occupant load exceeds 30.
In most cases the simple answer is yes, you do have to comply with the accessibility requirements of the NYC Building Code. Exception 5 of Section 28-101.4.3 of The administrative code requires all building undergoing alterations to comply with Chapter 11 of the building code for accessibility.
For alterations of existing buildings, the building owner has the option to use the 1968 building code or earlier depending on the original construction date of the building. There are exceptions to this for certain worktypes and trades. Typically all Mechanical, Plumbing, Fire Protection, Structural, and Accessibility related work will need to comply with the 2014 while general construction and architectural work may utilize the older code as applicable.
When an applicant requests review under the 2014 NYC Building Code they are essentially stating that the entire building complies with all sections of that code. Any conditions that were designed in accordance with the 1968 Building Code, or earlier, must be updated to the new code.
Building’s Bulletin 25 of 2009 (BB 2009-025) allows changes between occupancy group M (Mercantile or Retail) and group B (businesses) without the need to obtain a new C of O when certain conditions are met. The conditions are as follows
Both the 1968 and 2014 Building Code address access control devices on required egress doors. Both codes are similar in that they may require commissioner approval for such a device and have a list of additional safeguard that must be met including but not limited to: