The written contract is usually the starting point: it should define the scope of work, the payment schedule, completion deadlines, and often a process for providing notice and a chance to "cure" before the homeowner can treat the contract as breached.

Understanding exactly what was promised, what was paid, and what's actually missing helps clarify whether the contractor is in breach or whether a change order, delay, or dispute over scope explains the gap.

Sending a written notice describing the incomplete work and a reasonable deadline to finish is often the first step, both because many contracts require it and because it creates a paper trail. A complaint to the state contractor licensing board can also prompt a response, since many contractors are motivated to protect their license.

Mediation or direct negotiation can resolve a surprising number of these disputes without litigation, particularly when the contractor has a legitimate explanation, like a supply delay or a dispute over unpaid change orders.

If the contractor stopped work without justification and won't respond to notice, the homeowner generally has a breach of contract claim, with damages that can include the cost of hiring someone else to finish the work and any resulting property damage.

It's worth knowing that an unpaid contractor may also have rights of their own — including the ability to file a mechanic's lien against the property — which can complicate matters if there's a genuine dispute over how much was owed at the time work stopped.

Common protective steps include requiring lien waivers as payments are made, withholding a final retainage until the work passes inspection, and verifying a contractor's licensing, bonding, and insurance before signing anything.

Keeping thorough documentation — photos, receipts, written change orders, and a record of communications — makes any later dispute, whether informal or in court, considerably easier to resolve.