ยง  582.  Valuation of agricultural structures. Structures used on land
  used in agricultural production located within an agricultural  district
  and/or  on  property receiving an agricultural assessment as provided in
  article twenty-five-AA of the  agriculture  and  markets  law  shall  be
  assessed  at  an  amount  not  to  exceed the cost of replacement new at
  current prices less a deduction for physical depreciation calculated  in
  accordance  with the assessor's manual distributed by the office of real
  property  services,  and  if   applicable,   functional   and   economic
  obsolescence.  For  the  purpose  of  this  section, structures shall be
  defined as those used:
1. For the production or storage of  crops,  livestock,  or  livestock
  products  as defined in section three hundred one of the agriculture and
  markets law;
2.  For  the  storage  of  equipment  and/or  supplies  used  in  such
  production;
3.  In whole or in part as farm labor dwellings, except for structures
  which are  used  as  the  principal  residence  of  the  owner  of  such
  structure; or
4.  For on farm processing or on farm retail merchandising, so long as
  at least seventy-five percent of the annual volume of such processing or
  such merchandising utilizes crops, crop products, livestock or livestock
  products, as defined in section three hundred one of the agriculture and
  markets law, produced on such land owned or operated by such applicant.
Structure New York Laws
Article 5 - Assessment Procedure
Title 4 - Miscellaneous Provisions
561 - Payments in Lieu of Taxes; Change of Assessment; Effective Date.
561-A - Payments in Lieu of Taxes; Change of Assessment; Notice.
562 - Certain Property Used or Occupied by a Railroad.
563 - Real Property Used to Store Spent Nuclear Fuel.
564 - Privately-Owned Improvements on State Lands.
570 - Advisory Valuations of Utility Real Property.
572 - Employment of Experts in Connection With Assessments of Real Property.
574 - Information to Be Furnished by Recording Officers and Assessors.
575 - Assessor's Annual Reports.
575-A - Electric Generating Facility Annual Reports.
575-B - Solar or Wind Energy Systems.
576 - Assessment Under Cooperative Agreements.
578 - County Assistance Under Cooperative Agreements.
579 - Coordinated Assessment Programs.
581 - Assessment of Residential Cooperative, Condominium and Rental Property.
581-A - Assessment of Residential Real Property.
581-B - Assessment of Parcels Used for Residential Purposes and Registered as Family Day Care Homes.
582 - Valuation of Agricultural Structures.
582-A - Value of Lands and Structures Supporting Non-Residential Water Dependent Activities.