California Contractor Compliance Checklist

California has some of the strictest contractor compliance requirements in the country. Miss a preliminary notice window or skip a lien waiver and you could lose your right to collect — or worse, face a license board complaint.

This checklist covers every document you need from contract signing through project closeout on a California home improvement project.

Why Compliance Documentation Matters

Beyond the legal requirements, a documented paper trail protects you in three ways: lien rights (California's mechanics lien law requires specific notices to preserve your right to lien if you're not paid), license protection (CSLB complaints often come from documentation failures, not workmanship), and dispute resolution (every arbitration or small claims case comes down to paperwork).

Before Work Begins

Home Improvement Contract (required) — California BPC §7159 requires a written contract for any home improvement work over $500. The contract must include: contractor license number, start and completion dates, payment schedule, description of work, and the Three Day Right to Cancel notice for contracts signed at the homeowner's residence.
Preliminary Notice — If you have subcontractors or material suppliers on the job, they must serve a Preliminary Notice within 20 days of first furnishing labor or materials to preserve their lien rights.
Permits — Pull all required permits before starting work. Document permit numbers in your project file. Never let a sub start work requiring a permit before it's issued.
Workers' Compensation Certificate — Get a current certificate from every subcontractor before they set foot on the job. If a sub gets injured without valid workers' comp, it can become your liability.
Subcontractor License Verification — Verify every sub's CSLB license at cslb.ca.gov before they start. An unlicensed sub on your job is your problem.

During the Project

Progress payment documentation — For each milestone: issue a written invoice, get a signed Conditional Waiver and Release Upon Progress Payment (Civil Code §8132) from every sub and supplier being paid, and keep a payment log.
Change orders — Any scope change must be in writing and signed before work begins.
Daily logs — Not legally required but invaluable for disputes. Note weather, workers on site, work performed, and any unusual conditions.

At Project Completion

Notice of Completion — File with the county recorder within 15 days of project completion. This starts the clock on the lien period (15 days for subs after NOC vs. 90 days without one).
Unconditional Lien Waivers — Get a signed Unconditional Waiver and Release Upon Final Payment (Civil Code §8138) from every subcontractor and material supplier before releasing final payment.
Project closeout documents — Deliver to the client: copies of all permits with final inspection sign-off, warranties for materials and equipment, subcontractor warranty information, and as-built drawings if applicable.

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