Contractor Red Flags and Credentials: What to Verify Before You Sign

Most contractor horror stories have something in common: the warning signs were there before the project started. A homeowner liked someone's vibe, skipped the verification steps, and found out too late that the contractor was unlicensed, underinsured, or simply not equipped to handle the scope. Here is what to look for before you hand over a deposit.

Red Flags That Should Stop a Conversation

These are not minor concerns to weigh against a low price. These are reasons to walk away:

• A large upfront cash deposit before any work begins. In California, a contractor cannot legally collect more than 10 percent of the contract price or $1,000 upfront, whichever is less, for most home improvement contracts. Anyone asking for 30 to 50 percent before breaking ground is not operating within the law.
• No written contract or a vague one-page agreement. Every legitimate project starts with a detailed written contract. If a contractor pushes back on putting things in writing, that is a deliberate choice.
• A bid dramatically lower than everyone else's. A bid that is 30 to 40 percent under the field is not a deal. It is a sign that something is being left out, whether that is materials quality, permit costs, or the labor needed to finish the job correctly.
• Pressure to sign today to lock in the price. Urgency tactics during the sales process are a red flag, not a scheduling reality.
• Reluctance to pull permits. If a contractor suggests skipping permits to save time, they are asking you to accept the liability and the risk of failed inspections at resale.
• No physical business address or verifiable history. A company that cannot be found beyond a phone number and a social media profile has no track record to check.

Licensed vs. Unlicensed: What It Actually Means

A licensed contractor in California has passed a trade exam, maintains required insurance and bonding, and is accountable to the Contractors State License Board if something goes wrong. An unlicensed contractor has none of that accountability structure, no matter how good their word-of-mouth is.

The practical risk to you: if an unlicensed worker is injured on your property, you can be held personally liable. If the work fails inspection or causes structural damage, you have no recourse through the licensing board. And depending on your homeowner's insurance policy, work performed by unlicensed contractors may void your coverage for related claims.

The lower price an unlicensed contractor offers rarely accounts for those risks. It usually reflects the cost of not carrying proper insurance, not pulling permits, and not meeting the minimum training standards the license requires.

What Insurance Your Contractor Must Have

Two policies matter, and both are non-negotiable:

• General liability insurance covers property damage and accidents that happen during the project. If a crew member drops a tool through your skylight, this is what pays for it.
• Workers' compensation insurance covers injuries to the crew while they are working on your property. Without it, an injured worker can potentially bring a claim against you directly, since the injury happened on your premises.

Ask for a Certificate of Insurance naming you as additionally insured, and call the carrier listed on the certificate to confirm the policy is active. A certificate can be printed with a cancelled policy behind it. The two-minute call to the carrier is what catches that.

How to Check References Properly

Most homeowners call a reference and ask "were you happy with them?" That question tells you almost nothing because almost everyone says yes. Ask better questions:

• "What went wrong during the project, and how did the contractor handle it?" Every real project has something go sideways. The answer tells you how this company behaves under pressure.
• "Did the final cost match the original estimate? If not, why not?"
• "How was communication during the slow, boring middle weeks of the job, not just the exciting phases?"
• "Would you hire them again for a completely different type of project?"

Also ask for references from projects similar in scope to yours. A contractor who is great on small bathroom refreshes may not have the systems to manage a whole-home remodel.

How to Verify a License in California

Go to cslb.ca.gov and search the contractor's name or license number. Confirm three things:

• The license is active and in good standing, not expired or suspended
• The name on the license matches the business name on your estimate and contract
• There are no open complaints or disciplinary actions on record

This takes about two minutes and is the single most protective thing you can do before signing. Do it before you schedule the in-home estimate, not after you have already decided you like the person. It is much easier to disqualify someone on paper than to walk away after two hours of conversation.