NY · Mechanics Lien Law
New York Mechanics Lien Law: Deadlines, Notices & Filing Guide
New York Lien Law Article 2 distinguishes between single-family residential, commercial, and public-improvement liens, each with its own filing window. Owners can also serve a 30-day demand to commence suit under § 59.
New York mechanics lien deadlines at a glance
New York does not require a preliminary notice for private projects, but Lien Law § 38 allows owners to demand an itemized statement of the lien amount.
Single-family residential: 4 months from last work. Commercial: 8 months from last work (4 months on public improvements).
1 year from filing for commercial private liens (subject to one renewal); public-improvement liens have specific bond/discharge timelines.
Public-improvement claims under Lien Law § 5 must be filed within 30 days after the entire improvement is completed and accepted; a separate notice of claim under State Finance Law § 137 may apply.
Primary statute
New York Lien Law, Article 2 · New York Lien Law, Article 2 §§ 5, 12 (Public Improvement)
View official statuteWho can file a mechanics lien in New York?
Contractors, subcontractors, sub-subcontractors, material suppliers, laborers, architects, engineers, and surveyors who improved real property at the owner's request or with the owner's consent.
Overview of New York lien practice
New York mechanics lien practice is governed by Article 2 of the Lien Law. Unlike most states, New York does not impose a preliminary notice requirement on private projects — but it strictly enforces filing deadlines that turn on the type of project (single-family residential, commercial, or public improvement). Liens on commercial projects are valid for one year and may be extended by court order or by extension. Owners may serve a § 59 demand requiring the claimant to commence suit within 30 days, and § 38 allows demands for an itemized statement of the lien.
Common pitfalls on New York projects
Filing under the wrong deadline category
Single-family residential liens have a 4-month window; commercial work has 8 months; public improvements have 30 days after acceptance.
Allowing a § 59 demand to lapse
An owner-served notice to commence suit cuts the enforcement window to 30 days — a frequent trap on commercial projects.
Missing the bond-discharge window
If the owner discharges the lien by bond, the claimant has limited time to assert claims against the bond.
New York mechanics lien FAQs
Does New York require a preliminary notice?
No. Private projects in New York do not require a pre-lien or preliminary notice. However, owners may demand an itemized statement of the lien at any time under § 38.
How long do I have to file a New York mechanics lien?
Single-family residential: 4 months from last work. Commercial: 8 months. Public improvements: 30 days after the improvement is completed and accepted.
How long is a New York mechanics lien valid?
One year from filing on commercial projects, subject to renewal by court order or extension. Single-family residential liens have shorter terms.
Filing a New York mechanics lien or bond claim?
My Lien Lawyer coordinates mechanics lien filings, bond claims, and construction collections in New York — directly or through our vetted local-counsel network. The first call is free.
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This page is general information and not legal advice. Statutes change — verify against the official text linked above.