Reading the contract against what happened
Most disputes start with what the contract actually promised: the scope, the drawings and specifications, the price and payment schedule, and how changes were to be approved. In New York, home improvement contracts are subject to specific requirements, including that they be in writing, and in New York City and several nearby counties the contractor generally needs a home improvement license. Whether those requirements were met can affect what the contractor is able to collect. Builders of new homes may also be bound by a warranty that state law implies in new home sales, though a contract can sometimes substitute a limited warranty of its own. Compare the payments you made with the work completed, because overpayment relative to progress is often the core of the loss.
Protecting the house and the record
Photograph the work as it stands, keep every invoice, receipt, change order, text, and email, and prepare a timeline of what was promised and when, working with your lawyer. Before hiring someone new to finish or fix the work, ask whether the existing contractor must first be given notice or a chance to cure under the contract, and have the condition documented by an independent inspector. Subcontractors and suppliers who were not paid may file a mechanic's lien against the house even if you paid the general contractor, so watch for lien notices. Withholding payment can be appropriate in some situations, but doing it outside the contract's procedures can shift the dispute against you.
Choosing the route
Some disputes settle through negotiation once both sides see the documents; others go to arbitration if the contract requires it, or to court, including small claims for smaller amounts. A complaint to the licensing agency, such as the city's consumer protection department, can run in parallel but usually does not produce full compensation on its own. In some situations a contractor's bond or a trust fund may be a source of recovery when the contractor cannot pay. We review the contract, payment records, and photographs with you, look at any lien on the property, and talk through which approach fits the amount at stake. We also keep an eye on timing, since some claims and lien challenges carry deadlines.