Consider this example: the contractor said the renovation would take four months and cost $180,000. Eight months later, the project is half-finished, the invoices have already exceeded $250,000, and there's a mechanic's lien filed against your property. Now the contractor is threatening to walk off the job unless you approve another $40,000 in change orders you never authorized.
This scenario, or some version of it, plays out constantly in New York's construction industry. Whether you're a property owner who hired a general contractor, a general contractor dealing with an unreliable subcontractor, or a subcontractor who hasn't been paid, construction disputes carry unique legal risks that don't exist in ordinary breach of contract cases.
New York's Lien Law, the trust fund provisions of Article 3-A, strict filing deadlines, and the interplay between contract claims and construction-specific statutes create a legal terrain where mistakes are expensive and delays are unforgivable. Business owners across Brooklyn, Queens, Manhattan, and Staten Island need to understand these rules before a dispute escalates, because by the time a mechanic's lien is filed or a trust fund claim is asserted, your options have already narrowed.
Four Construction Problems That End Up in Court
Construction disputes in New York fall into recurring patterns. The four below map the territory this guide covers, in the order the sections that follow address them, moving from payment security through performance.
Payment disputes cascade through the construction chain. General contractors can sue for breach. Subcontractors can file mechanic's liens. Material suppliers can pursue trust fund claims.
The contract says "renovate the second floor." The owner expected new electrical, plumbing, and HVAC. The contractor expected cosmetic updates. Vague scope descriptions can turn different expectations into a payment dispute.
Defective work triggers breach of contract, breach of warranty, and potentially negligence claims depending on the defect's nature and whether it caused property damage or personal injury.
The contractor performs extra work without written authorization and then demands payment for it. Whether the owner owes anything turns on consent, and on what the contract says about changes.
Mechanic's Liens in New York: Filing Rights, Deadlines, and Consequences
A mechanic's lien is a security interest in real property, filed by someone who provided labor or materials for a construction project and wasn't paid. It's the construction industry's most powerful collection tool, and one of the most strictly regulated legal mechanisms in New York.
Under Lien Law § 3, anyone who "performs labor or furnishes materials for the improvement of real property with the consent of or at the request of the owner" can file a mechanic's lien. That includes general contractors, subcontractors, material suppliers, laborers, architects, engineers, and landscape contractors.
These are private-project deadlines under Lien Law § 10; most non-single-family projects use the eight-month period. Retainage has a separate filing window of 90 days after it was due to be released, and the statute contains a developer-subdivision exception to the single-family rule. Service and proof must comply with §§ 11 and 11-b. A lien can obstruct a sale or refinancing, but filing alone does not establish the debt. A subcontractor's recovery is generally limited by the unpaid lien fund, including qualifying sums subsequently earned under the upstream contract.
An owner can bond off a private lien with the required 110% undertaking. Under Lien Law § 17, a lien ordinarily lasts one year unless timely continued or enforced by foreclosure with the required notice of pendency. The notice itself lasts three years from filing under CPLR § 6513; a court extension must be obtained and recorded before it expires. This is not an automatic three-year extension of every lien. A construction dispute lawyer can assess bonding, discharge or foreclosure.
Public vs. Private Project Liens
New York gives you a lien to secure payment on nearly any construction project, but the rules split sharply depending on who owns the job. Private work and public work follow different statutes, different deadlines, and different targets for the lien, and filing under the wrong track is usually fatal to the claim. Knowing which regime governs your project before you file is the difference between a lien that protects you and one a court throws out.
A private lien is filed against the property itself. It attaches to the land and building, clouds the title, and can be enforced by a foreclosure sale in court.
It is open to contractors, subs, suppliers, and design professionals, and must be filed within eight months of the last work on a commercial project.
A public-improvement lien does not attach to public land. Under Lien Law § 5, it reaches qualifying money due or to become due under the public construction contract.
Eligible subcontractors, laborers and suppliers may file during the work or within 30 days after completion and acceptance. Lien Law § 12 requires filing with the responsible agency and the official holding the contract funds, not merely the county clerk.
Contract clauses that purport to waive lien rights before work is done are void as against public policy in New York. A "no lien" clause buried in your subcontract does not erase the statutory right to file. Waivers tied to a specific progress payment you actually received are enforceable, but blanket waivers of future lien rights are not.
Removing a Mechanic's Lien From Your Property
For a property owner, a lien is a problem to be cleared, not filed. New York gives owners several ways to get one off the title, and the right move depends on whether you want the lien gone fast, gone permanently, or challenged as invalid. A filed lien is not a finding that the money is owed. It is a claim, and claims can be defective, inflated, or discharged.
Bonding off a lien can clear title without deciding who owes the money. Lien Law § 19(4) requires a 110% undertaking and compliance with its filing, service and surety requirements. Once effective, the bond replaces the property as security, allowing a sale or refinance to proceed subject to the transaction's other requirements.
An owner may seek summary discharge under Lien Law § 19(6) for qualifying defects apparent from the notice or public record; disputed merits generally require more than this summary procedure. Under Lien Law § 38, an unanswered or insufficient itemization demand leads first to an application for a court order directing compliance. Failure to obey that order can support a later application to cancel the lien; ignoring the initial demand does not automatically cancel it.
Which path fits depends on the defect, the deadline posture, and whether a foreclosure action has already started. An owner facing a lien on a live transaction should move quickly, because the cheapest options narrow once the lienor forecloses. A business litigation attorney can identify the fastest clean exit for your situation.
Construction Trust Funds and Personal Liability
Article 3-A of New York's Lien Law treats qualifying construction receipts as trust assets for statutory project obligations. Applying those assets to a non-trust purpose while trust claims remain unpaid can constitute diversion under § 72. Officers who knowingly participate in a wrongful diversion may be personally liable; their corporate title alone does not establish liability.
Using one project's trust money to pay unrelated project debts or personal expenses can be a diversion. The analysis follows the source of the money, the permitted trust purposes and the unpaid trust claims. Nonpayment alone does not prove that funds were received and diverted, and legitimate project costs should not be confused with unrelated expenses.
An unpaid trust beneficiary can use Lien Law § 76 to request records or a verified statement after the statutory waiting period. Failure to keep required records is presumptive evidence of diversion under § 75(4); refusal to answer a proper demand supports an application to compel compliance. Neither guarantees recovery. Section 77 generally requires a representative action for all trust beneficiaries, following class-action procedure with statutory qualifications. The usual deadline is one year after completion; for subcontractors and material suppliers, the later of that date or one year after final payment became due under their contract applies. A business litigation attorney can evaluate the evidence and deadlines.
Pay-When-Paid vs. Pay-If-Paid Clauses
Payment Timing Is Not the Same as Payment Risk
Under New York law, a clause that makes the owner's payment a condition of the subcontractor ever being paid is generally unenforceable because it shifts owner nonpayment risk downstream and undermines lien rights. Clear drafting does not cure that pay-if-paid problem. The Court of Appeals established the rule in West-Fair Electric Contractors v. Aetna, 87 NY2d 148 (1995).
A genuine pay-when-paid provision may regulate timing without eliminating the payment obligation, but cannot be used to delay payment indefinitely. The actual language, applicable prompt-payment rules and governing law matter. A valid choice of another state's law can affect the result, but General Business Law § 757 generally voids foreign-law clauses in covered construction contracts, with an exception for material-supplier contracts. Neither a clause heading nor a foreign-law label settles enforceability.
Lien Waiver Protocols: Where Mistakes Cost the Most
Lien waivers are exchanged at every progress payment on most New York construction projects. Get them wrong and an owner pays twice for the same work, or a subcontractor signs away rights it didn't know it had.
Lien Law § 34 generally invalidates advance waivers of lien rights, but permits qualifying waivers delivered with or after payment and agreements concerning liens already filed. A progress or final document may also contain a broader release of contract claims. Identify the work and payment covered, reserve disputed extras or retainage where appropriate, and check whether effectiveness depends on actual payment. Neither the word "partial" nor "unconditional" settles every question. A contract attorney should review the actual waiver and release language.
Substantial Performance: When "Mostly Done" Counts as Done
One of the most consequential doctrines in construction law is substantial performance. New York courts apply it when a project is largely complete and usable for its intended purpose, but minor defects or unfinished items remain. The doctrine determines whether the contractor is entitled to the contract balance or whether the owner can withhold payment entirely.
The contractor worked in good faith and the deviations from the contract are minor, unintentional, and fixable. The owner can occupy and use the property for its intended purpose.
When it applies, the contractor may recover the unpaid contract balance, reduced by the legally appropriate allowance for remaining defects.
The deviations are material and cut to the heart of the bargain, or the defects keep the property from being used as intended. Deliberate departures from the plans also defeat it.
Failure to substantially perform can bar recovery of the contract balance. Quantum meruit is not an automatic fallback where an enforceable contract governs the work.
The doctrine cuts both ways. Contractors invoke it to collect on a project the owner argues is incomplete. Owners invoke its limits to withhold payment when defects are too significant to ignore. Whether substantial performance applies turns on the specific facts of completion percentage, deviation severity, and the project's usability. A breach of contract attorney can evaluate whether the doctrine helps or hurts your position.
Change Orders and Unauthorized Work
Change orders are modifications to the original scope, price, or timeline. They're normal in construction, virtually no project finishes exactly as specified. But they're also the source of the most contentious disputes.
Require every change in writing, signed by both parties, before work begins, and state plainly that unauthorized work is at the contractor's own expense.
Document everything. If a contractor starts unapproved work, send a written objection at once, since that paper trail is your strongest defense.
Never verbally approve changes or stand by while extra work proceeds; a court can find implied consent if you knew of it and failed to object in time.
A written-change requirement may be waived by authorized conduct in some circumstances. Quantum meruit generally cannot override an enforceable contract governing the same work.
When the Project Runs Late, Who Pays?
Construction delays cost money: lost rental income, extended financing costs, displaced tenants, missed occupancy deadlines. The question is who bears that cost.
A daily rate for late completion, agreed at signing. There is no standard court-approved dollar range; the amount must fit the anticipated harm on that project.
It is enforceable when the amount is reasonable at signing and the actual delay cost would be difficult to calculate in advance.
Without an enforceable liquidated-damages clause, a claimant must prove recoverable losses caused by the delay, subject to foreseeability, reasonable certainty, mitigation and contractual limits.
It demands detailed records; the more thorough your documentation, the stronger your claim for recoverable damages when you sue.
Owner-caused delay may support a contractor's defense or claim, depending on the contract and facts. New York generally enforces no-damages-for-delay clauses, with exceptions for bad faith or willful, malicious or grossly negligent conduct, delays outside the parties' contemplation, delays amounting to intentional abandonment, and breach of a fundamental contractual obligation. Preserve required notices and proof of causation; ordinary poor coordination does not automatically establish an exception.
Seven Contract Provisions Every Construction Agreement Needs
Whether you're the owner or the contractor, these provisions reduce litigation risk and clarify expectations from day one.
Detailed Scope with Plans & Specs
Vague scope language creates avoidable construction disputes. Spell out every phase, material grade, and finish standard in writing, and incorporate the architectural plans and specifications by reference so "renovate the second floor" cannot quietly mean two different things to two parties. A precise scope is the first document a court reads when the sides disagree about what was actually promised.
Milestone-Based Payment Schedule
Tie payments to clear milestones and applicable prompt-payment requirements. For contracts covered by General Business Law Article 35-E and its current retention rule, § 756-c caps agreed retainage at 5%; downstream retention cannot exceed the owner's actual percentage. Owner retainage is due within 30 days after final approval of the work. Coverage depends on project type, value and contract date; public work and specified residential projects have different rules. Check which rules govern before setting a retention percentage.
Written Change Order Requirements
Require changes to scope, price or schedule to be recorded in a signed writing before extra work begins, and follow the contract's notice and approval procedures. This helps establish what was authorized and at what price, but does not guarantee that every unwritten-extra claim fails. Conduct, authority and any waiver of the writing requirement still matter.
Liquidated Damages Clause
If a daily late-completion amount is appropriate, base it on anticipated harm that would be difficult to measure at contracting, not a penalty. An enforceable clause can simplify the amount calculation, but the claimant must still establish that the clause applies and that the delay creates liability under the contract.
Insurance & Indemnification
Specify appropriate general liability, workers' compensation and project property coverage, and review the policies and endorsements needed for the intended protection. A certificate of insurance is evidence of coverage, not a substitute for additional-insured terms in the policy. Coordinate insurance with an indemnity clause that respects General Obligations Law § 5-322.1, including its restriction on shifting the indemnitee's own negligence.
Dispute Resolution Mechanism
Decide in advance how disputes will be resolved, whether through mediation, arbitration, or litigation, so a procedural fight is never stacked on top of the substantive one. A well-drafted clause can also fix the venue, allocate attorney's fees, and require a good-faith negotiation step before anyone files. That structure alone often pushes parties toward settlement instead of a courtroom.
Termination Provisions
Include both for-cause termination, available after written notice and a chance to cure, and termination for convenience, with fair compensation for work already completed. Clear exit terms let a party end a failing relationship without handing the other side a ready-made breach claim. Without them, simply walking off the job can create more liability than staying on it would.