Short answer. California offers strong consumer protections on construction warranty. Express warranties are in the contract. Implied warranties exist by law. The statute of repose for hidden defects is 10 years. Patent defects can be filed within 4 years. The contract should commit to at least a 1-year express labor warranty plus material pass-through.
Warranty terms get the least attention during contract review and matter the most after a project closes. This guide explains the law, what to look for in a warranty clause, and how to enforce a claim if work falls short. We write this from the perspective of a CSLB licensed contractor (#1072368) who has handled warranty calls on residential remodels for years.
Two kinds of warranty in California
Express warranty
The written warranty in the contract. Sets explicit duration, scope, and process. Common terms run 1 year on labor and the manufacturer's term on materials. Quality contractors offer longer durations on specific scopes (10 to 25 years on roofing systems, lifetime on certain finishes).
Implied warranty
The legal presumption that the work meets professional standards and is fit for its intended purpose. Applies even if the contract is silent. Cannot be waived below California law minimums. Provides recourse when the express warranty does not cover a defect.
Statutes of limitation that matter
- Code of Civil Procedure 337.1. Patent defects (visible on reasonable inspection). 4 years from substantial completion.
- Code of Civil Procedure 337.15. Latent defects (hidden from reasonable inspection). 10 years from substantial completion.
- Code of Civil Procedure 337. Written contract breach. 4 years from breach.
- Code of Civil Procedure 339. Oral contract breach. 2 years from breach.
What to look for in your contract's warranty clause
- Minimum 1 year express labor warranty.
- Manufacturer's warranty pass-through on materials with brand and model details.
- A clear claim submission process (written, email, or portal).
- Response time commitment (typically 5 business days for non-emergency, 24 to 48 hours for water or structural issues).
- Contractor's current contact information for warranty service after close.
- A statement that the express warranty does not waive any implied warranties under California law.
How to enforce a warranty claim
- Document the defect in writing with photos and dated notes.
- Submit a warranty claim through the contract's stated process.
- Allow the contractor a reasonable opportunity to repair.
- If the contractor does not respond or refuses, file a complaint with the CSLB. CSLB mediates many disputes informally.
- For unresolved cases, mediation under the contract's dispute resolution clause. Litigation is the last resort.
What good contractors do beyond the minimum
The strongest sign of a quality contractor is what they do after the final inspection. We provide a written 1-year warranty on labor plus pass-through on all manufacturer warranties. We respond to warranty calls inside 48 hours. We make repairs without arguing about whether the issue is covered. That is the standard we work to and the standard you should expect from any California contractor.
For verification before hiring, see the CSLB license lookup walkthrough. For interview prep, read 22 questions to ask a general contractor. For selection framework, see how to choose a general contractor.
