Contractor Warranties: What to Expect and What to Put in Writing

When a contractor finishes a project and you hand over final payment, your protection doesn't end there — or it shouldn't. A properly written contract includes warranty provisions that obligate the contractor to stand behind their work. Understanding the difference between workmanship warranties and manufacturer warranties helps you know what to expect and what to demand.

Most homeowners don't think about warranties until something fails. By then, it's often too late to negotiate the terms.

What is a workmanship warranty and what does it cover?

A workmanship warranty is the contractor's personal guarantee that their labor was performed correctly and will hold up over a specified period. It covers defects in installation and construction technique — not the materials themselves. If a tile installer grouts improperly and tiles begin to crack within a year, that's a workmanship defect covered by the contractor's warranty, not a manufacturer defect in the tile.

Industry standard workmanship warranties are typically one year for general construction and remodeling. Specialty trades may offer longer periods: roofing contractors often offer two-year workmanship warranties, and some new home builders provide ten-year structural warranties as required by state law. Always confirm the warranty period in writing before signing a contract.

What is a manufacturer warranty and how is it different?

A manufacturer warranty covers defects in the materials and products used in your project — the roof shingles, the HVAC unit, the windows, the flooring. These warranties are issued by the product manufacturer, not the contractor, and their terms vary widely. Some products carry lifetime warranties; others carry 10-year, 20-year, or 30-year coverage.

The critical point: many manufacturer warranties are only valid if the product is installed by a licensed, certified contractor according to manufacturer specifications. Hiring an unlicensed contractor can void the manufacturer warranty on the materials installed. A $40,000 roof might carry a 30-year shingle warranty — but if the shingles were installed by an unlicensed roofer who didn't follow the manufacturer's installation protocol, that warranty is void before the first rainstorm.

What warranty language should I require in a contract?

Your contract should specify: (1) the warranty period for workmanship in months or years; (2) what defects are covered and what are excluded (normal wear and tear is typically excluded); (3) the process for making a warranty claim — how to notify the contractor and in what timeframe they are required to respond; and (4) the remedy — repair, replacement, or refund.

Avoid vague language like “we stand behind our work.” Require specific time periods and specific remedies. A contractor who resists putting clear warranty language in the contract is signaling something important about how they handle post-project problems.

• Minimum one year on all workmanship.
• Manufacturer warranty documentation provided at project completion.
• Written notice process for warranty claims with a response deadline.
• Defect repair to be completed at no cost to homeowner within a specified timeframe.

Does an unlicensed contractor's warranty have any legal value?

In most states, very little. Many states explicitly provide that contracts with unlicensed contractors are unenforceable or voidable — meaning the warranty clause may be unenforceable too. California, for example, prevents unlicensed contractors from maintaining lawsuits to collect payment, and homeowners in California can often recover all money paid to an unlicensed contractor regardless of the quality of work.

Even where the contract is technically enforceable, an unlicensed contractor is unlikely to have business assets or insurance that would allow them to honor a warranty claim. The practical value of an unlicensed contractor's warranty promise is near zero.

How do I enforce a warranty if a contractor refuses to return?

Document the defect in writing and notify the contractor through email or certified mail. Give them a reasonable timeframe to respond and schedule a repair visit. If they fail to respond or refuse to honor the warranty, file a complaint with your state's contractor licensing board and pursue a claim through small claims court for the cost of remediation by another contractor.

Your leverage is much stronger with a licensed contractor because the licensing board can take disciplinary action against a licensee who refuses to honor a legitimate warranty. This is one of the most practical benefits of hiring licensed — and verifying that license upfront at CheckLicensed.com for $0.99 protects that leverage before the project begins.