Public Improvement Lien Deadlines: Request Notice, but Keep Your Own Calendar

Reviewed September 7, 2026.

For a New York public improvement, Lien Law § 12 allows a lien notice before completion and acceptance and within thirty days after both occur. The claimant’s last delivery date is not the same trigger. Confirm the public project, proper officials and applicable service requirements.

Use a § 11-a demand

Section 11-a permits an eligible person to file a written demand for notice of completion and acceptance before that event or within thirty days afterward. File it with the head of the department or bureau in charge of the construction or demolition.

The demand identifies the requester’s name and address, the contractor or subcontractor for whom work or materials were supplied, their estimated entire value, and a description of the public improvement. Retain proof of filing and accurate contact details.

The responsible official must cause written notice to be mailed within five days of the completion and acceptance covered by the filed demand.

Missing notice does not extend time

The original article omitted a critical limit: § 11-a(4) says failure to give the notice does not extend a deadline, create a cause of action, or otherwise alter a right or duty. Do not wait indefinitely for a response. Independently monitor project completion and acceptance and consider filing while work remains ongoing if the claim is otherwise proper.

A public-lien notice must be filed with the officials specified in § 12, and § 11-c has separate service and proof requirements. Payment-bond notices and suit deadlines are additional issues; requesting § 11-a notice does not preserve them.

Kushnick Pallaci PLLC assists clients throughout New York with public-improvement lien claims and defenses. Contact 631-752-7100 or vtp@kushnicklaw.com.

Attorney Advertising. General information, not legal advice.