2016 New York Laws
GOB - General Obligations
Article 5 - CREATION, DEFINITION AND ENFORCEMENT OF CONTRACTUAL OBLIGATIONS
Title 3 - (5-301 - 5-335) CERTAIN PROHIBITED CONTRACTS AND PROVISIONS OF CONTRACTS
5-323 - Agreements exempting building service or maintenance contractors from liability for negligence void and unenforceable.

 5-323. Agreements   exempting   building   service   or  maintenance
  contractors from liability for negligence void and unenforceable.  Every
  covenant,  agreement  or  understanding  in  or  in  connection  with or
  collateral to any contract or agreement affecting real property made  or
  entered  into,  whereby  or whereunder a contractor exempts himself from
  liability for injuries to person or property caused by or resulting from
  the negligence of such contractor, his agent, servants or employees,  as
  a  result  of work performed or services rendered in connection with the
  construction,  maintenance  and  repair  of   real   property   or   its
  appurtenances,  shall  be deemed to be void as against public policy and
  wholly unenforceable.