N.Y. Lien Law Section 12
Notice of lien on account of public improvements

At any time before the construction or demolition of a public improvement is completed and accepted by the state or by the public corporation, and within thirty days after such completion and acceptance, a person performing work for or furnishing materials to a contractor, his subcontractor, assignee or legal representative, may file a notice of lien with the head of the department or bureau having charge of such construction or demolition and with the comptroller of the state or with the financial officer of the public corporation, or other officer or person charged with the custody and disbursements of the state or corporate funds applicable to the contract under which the claim is made. The notice shall state the name and residence of the lienor, the name of the contractor or subcontractor for whom the labor was performed or materials furnished, the amount claimed to be due or to become due, the date when due, a description of the public improvement upon which the labor was performed and materials expended, the kind of labor performed and materials furnished, and materials actually manufactured for but not delivered to such public improvement, and give a general description of the contract pursuant to which such public improvement was constructed or demolished. If the lienor is a partnership or a corporation, the notice shall state the business address of such partnership or corporation, the names of the partners, and if a foreign corporation, its principal place of business within the state. If the name of the contractor or subcontractor is not known to the lienor, it may be so stated in the notice, and a failure to state correctly the name of the contractor or subcontractor shall not affect the validity of the lien. The notice must be verified by the lienor or his agent, to the effect that the statements therein contained are true to his own knowledge, except as to the matters therein stated to be alleged on information and belief, and that as to those matters he believes it to be true. The comptroller of the state or the financial officer of the public corporation or other officer or person charged with the custody and disbursements of the state or corporate funds applicable to the contract under which the claim is made shall enter the same in a book provided for that purpose, to be called the “lien book”. Such entry shall include the name and residence of the lienor, the name of the contractor or subcontractor, the amount of the lien and date of filing, and a brief designation of the contract under which the lien arose.

Source: Section 12 — Notice of lien on account of public improvements, https://www.­nysenate.­gov/legislation/laws/LIE/12 (updated Sep. 22, 2014; accessed Nov. 1, 2025).

3
Mechanic’s lien on real property 4
Extent of lien 4–A
Insurance proceeds liable for demands 5
Liens under contracts for public improvements 6
Liens for labor on railroads 7
Liability for advance payments, collusive mortgages and incumbrances 8
Terms of contract may be demanded 9
Contents of notice of lien 10
Filing of notice of lien 11
Service of copy of notice of lien 11–A
Notice of completion and acceptance may be demanded 11–B
Copy of notice of lien to a contractor or subcontractor 11–C
Copy of notice of lien to a contractor or subcontractor with respect to public improvements liens 12
Notice of lien on account of public improvements 12–A
Amendment 13
Priority of liens 14
Assignment of lien 15
Assignments of contracts and orders to be filed 16
Assignment of contracts and orders for public improvement to be filed 17
Duration of lien 18
Duration of lien under contract for a public improvement 19
Discharge of lien for private improvement 20
Discharge of lien after notice of lien filed by payment of money into court 21
Discharge of lien for public improvement 21–A
Vacating lien for a public improvement, by order of court 22
Building loan contract 23
Construction of article 24
Enforcement of mechanic’s lien 25
Priority of liens and assignments under contracts for public improvements 26
Subordination of liens after agreement with owner 28
Lien of certain judgments postponed 29
Subordination of liens to subsequent mortgage 30
Subordination of notices of lis pendens 31
Discharge of liens on sale of real property 32
Certain liens and claims not to be affected 33
Certain sections not to apply to laborers’ liens 34
Waiver of lien 35
Waiver of arbitration 37
Bond to discharge all liens 38
Itemized statement may be required of lienor 39
Lien wilfully exaggerated is void 39–A
Liability of lienor where lien has been declared void on account of wilful exaggeration 39–C
Repossession of materials not used
Green check means up to date. Up to date

Verified:
Nov. 1, 2025

Last modified:
Sep. 22, 2014

§ 12. Notice of lien on account of public improvements's source at nysenate​.gov

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