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Construction Litigation & Mechanics Lien Attorney in Buffalo, NY
Reviewed by J. Michael Lennon, Founding Partner | Roach, Lennon & Brown, PLLC | SUNY Buffalo Law School, J.D., magna cum laude | Admitted to practice in New York since 2004 | Last updated September 2026
Construction disputes move fast, and the deadlines that protect a contractor’s right to get paid move faster. Roach, Lennon & Brown represents owners, general contractors, subcontractors, and suppliers across Western New York in construction litigation, from contract disputes and defect claims to filing and defending mechanics liens.
When Construction Disputes Turn Into Litigation
Most construction disputes start as a payment problem before they ever become a lawsuit. An owner disputes an invoice, a general contractor withholds retainage, or a subcontractor claims the work does not match the contract. Under New York’s Prompt Payment Act, General Business Law Article 35-E, most private commercial construction contracts of $150,000 or more come with real deadlines attached. An owner must pay a contractor within 30 days after approving an invoice, and since a 2023 amendment, retainage on covered private contracts is capped at 5 percent and must be released within 30 days of final completion. Contracts that ignore these rules do not get a pass just because the parties signed something different.
Filing a Mechanics Lien in New York
A mechanics lien gives a contractor, subcontractor, laborer, or material supplier a claim against the real property itself when they are not paid for work or materials on an improvement. In New York, the notice of lien has to be filed within 8 months after completion of the contract or the last work performed, or within 4 months if the improvement involves a single family dwelling. Miss that window, and the lien right is gone, no matter how clearly you were shorted.
How Long a Lien Lasts
Filing the lien is only step one. Under New York’s Lien Law, a mechanics lien is only good for one year after it is filed. To keep it alive past that point, the lienor has to either start a foreclosure action and file a notice of pendency, or file an extension with the county clerk before the year runs out. Miss both, and the lien expires as if it were never filed, even if the underlying debt is still owed.
Public Projects, Private Projects, and Payment Bonds
Buffalo’s construction market runs on a mix of large public projects, private commercial development, and residential work, and the rules genuinely differ depending on which one you are in. Public improvement liens follow a separate section of the Lien Law with their own filing and duration rules, and payment bond claims on public jobs run on their own timeline entirely, often tighter than a private lien. Getting the category wrong at the start of a dispute can cost a contractor a right they never even knew was on the clock.
Why Work With a Buffalo Construction Litigation Attorney
Whether you are the one owed money or the one facing a lien you believe is invalid, timing decides most of these cases well before anyone sees a courtroom. J. Michael Lennon, founding partner at Roach, Lennon & Brown, focuses a substantial part of his litigation practice on construction law, alongside commercial litigation and employment matters, and has represented both sides of Western New York construction disputes for two decades. He works alongside Christopher H. Brown, Jr. on the firm’s Litigation & Dispute Resolution team, and the firm’s broader Construction Services work covers the contracts and compliance side of the same projects.
Frequently Asked Questions
How long do I have to file a mechanics lien in New York?
Under New York Lien Law Section 10, a contractor, subcontractor, laborer, or material supplier generally has 8 months after completing the work or furnishing materials to file a notice of lien. That window shrinks to 4 months if the improvement involves a single family dwelling. Filing after the deadline forfeits the lien right entirely, regardless of how much is owed.
How long does a mechanics lien last once it's filed?
A mechanics lien is valid for one year from the date it is filed, under New York Lien Law Section 17. To keep it alive past that point, the lienor must either commence a foreclosure action and file a notice of pendency, or file a formal extension with the county clerk before the year expires. Missing both deadlines causes the lien to expire.
What is New York's Prompt Payment Act and does it apply to my contract?
New York’s Prompt Payment Act, General Business Law Article 35-E, applies to most private commercial construction contracts valued at $150,000 or more. It sets firm deadlines for approving invoices and making payment, currently requiring an owner to pay a contractor within 30 days after an invoice is approved.
Is there a cap on retainage in New York construction contracts?
Yes. Following a 2023 amendment to the Prompt Payment Act, retainage on covered private commercial construction contracts is capped at 5 percent, and it must be released within 30 days after final completion of the work, subject to certain exceptions for disputed or defective work.
Can a subcontractor file a mechanics lien if the general contractor was paid?
Yes. A subcontractor’s right to file a mechanics lien generally does not depend on whether the general contractor has already been paid by the owner. The lien attaches to the owner’s interest in the real property, which is one reason owners often insist on lien waivers before releasing payment up the chain.
What happens if I receive a notice that a lien was filed against my property?
A property owner served with a mechanics lien has options, including disputing the amount, requiring the lienor to commence foreclosure within the statutory time limit, or moving to discharge or bond off the lien so it no longer clouds title. Ignoring a lien does not make it go away, and it can complicate a sale or refinancing until it is resolved.
Are mechanics lien rules different for public construction projects?
Yes. Liens for labor or materials on a public improvement follow a separate section of New York’s Lien Law with their own filing and duration rules, and claims against a payment bond on a public project run on an entirely different, often shorter, timeline. Public and private projects should never be treated as interchangeable when a payment dispute arises.
Can I still sue for breach of contract if my mechanics lien expires?
Generally, yes. An expired mechanics lien only forfeits the special lien remedy against the real property; it does not by itself eliminate an underlying breach of contract or unpaid invoice claim, which typically has its own separate statute of limitations. That said, losing the lien often means losing significant leverage in the dispute.
What is a notice of pendency and why does it matter for a mechanics lien?
A notice of pendency is a public filing that puts anyone dealing with the property on notice that a lawsuit affecting it is pending, and filing one is one of the two ways to keep a mechanics lien alive past its one year deadline if a foreclosure action is filed. Without it, even a timely-filed foreclosure action may not preserve the lien.
Do residential homeowners face the same lien deadlines as commercial property owners?
No. New York gives shorter lien-filing deadlines for improvements to a single family dwelling (4 months) than for commercial or multi-family property (8 months), and lien extensions for residential property are limited compared with commercial property. Anyone filing against, or defending, a residential lien should confirm which deadline actually applies before assuming the longer commercial timeline controls.
Talk to a Buffalo Construction Litigation Attorney
Free Consultation. Call (716) 235-3025 or reach us through our contact page before a filing deadline passes.
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