Private Works — 8-Month Filing Deadline
Under New York law, the Notice of Mechanic Lien on a private project may be filed at any time during the performance of the contract, but not later than 8 months from the date the lienor last furnished labor or materials on the project. NY Mechanic Lien Law §40 et seq.
This 8-month period is measured from the lienor's own last date of furnishing labor or the last delivery of materials on the job. The filing is made with the County Clerk in the county where the improved property is located.
Single Family Dwelling — 4-Month Filing Deadline
For single family dwelling projects, the filing deadline is shortened to 4 months from the lienor's last furnishing of labor or materials.
This shorter deadline reflects the heightened protections afforded to individual homeowners under New York mechanic lien law. Claimants working on single family dwelling projects must be particularly vigilant about this compressed timeline.
Retainage-Only Mechanic Liens — 90-Day Deadline
If the mechanic lien is for retainage only, the mechanic lien must be filed within 90 days of when the retainage became due.
This separate deadline applies specifically to situations where all other amounts have been paid and the only outstanding balance is retainage. Claimants should track when retainage becomes due to ensure timely filing.
Service Requirements — 5 Days Before Through 30 Days After Filing
A copy of the Notice of Mechanic Lien must be served upon the owner, the contractor, and the subcontractor (as relevant) 5 days before through 30 days after the filing of the notice.
This service requirement runs in both directions from the filing date, meaning the mechanic lien can be served up to 5 days before it is actually filed with the County Clerk, or up to 30 days after filing.
Proof of Service — 35-Day Recording Deadline
Proof of service of the Notice of Mechanic Lien must be recorded with the County Clerk within 35 days after the Notice of Mechanic Lien is filed. This is a mandatory requirement.
If proof of service is not recorded within this 35-day window, the notice terminates as a mechanic lien. This is one of the most critical procedural requirements under New York mechanic lien law and cannot be cured after the deadline passes.
Public Works — Notice of Mechanic Lien Filing (NYS Mechanic Lien Law §5)
On public works projects, the Notice of Mechanic Lien may be filed at any time before or up to 30 days after the completion and acceptance of the project by the public owner.
The Notice of Mechanic Lien must be given to the head of the department or bureau of the public agency and filed with the comptroller of the State of New York or the financial officer of the public corporation, with proof of service by certified mail. The notice must be filed twice: once with the person in charge of construction and with the person responsible for payment, with copies served on the contractor and subcontractor 5 days before through the day of filing.
Important Filing Considerations
If the owner has paid the general contractor, the mechanic's lien is valid only to the extent that funds remain to be paid from the owner to the general contractor. The mechanic lien must be filed prior to any transfer of the property; otherwise, the owner is protected from the mechanic lien.
Claimants must be registered to do business in New York in order to file suit to enforce a mechanic's lien. This registration requirement is a prerequisite to commencing legal action.
Frequently Asked Questions
What is the deadline to file a mechanic's lien in New York?
For private projects, the Notice of Mechanic Lien must be filed within 8 months of last furnishing labor or materials. For single family dwellings, the deadline is shortened to 4 months. For retainage-only mechanic liens, the deadline is 90 days from when retainage became due.
When must I serve the Notice of Mechanic Lien on the owner?
A copy must be served upon the owner, contractor, and subcontractor 5 days before through 30 days after the filing of the Notice of Mechanic Lien.
What happens if I don't record proof of service within 35 days?
If proof of service is not recorded with the County Clerk within 35 days after the Notice of Mechanic Lien is filed, the notice terminates as a mechanic lien. This deadline is absolute and cannot be cured.
What is the public works mechanic lien filing deadline in New York?
On public works projects, the Notice of Mechanic Lien may be filed at any time before or up to 30 days after the completion and acceptance of the project by the public owner. NYS Mechanic Lien Law §5.
Can I file a mechanic lien if the owner already paid the contractor?
The mechanic's lien is valid only to the extent that funds remain to be paid from the owner to the general contractor. If the owner has paid in full, mechanic lien rights may be significantly limited.
Must I be registered to do business in New York to file a mechanic lien?
You must be registered to do business in New York in order to file suit to enforce a mechanic's lien. This is a prerequisite to commencing legal action, though the mechanic lien itself may still be filed.
Related New York Resources
Explore other critical compliance areas for New York construction mechanic lien law.
Notice Requirements
Itemized statement demands, trustee examination rights, and service requirements for private and public works under New York law
Mechanic Lien Enforcement Deadlines
1-year mechanic lien enforcement period, mechanic lien extension procedures, Notice of Pendency rules, private bond suit deadlines, and public works enforcement
New York Overview
Return to the main New York construction mechanic lien law page