10 Contractor Red Flags — Warning Signs Before You Hire

Red Flag 1 — No CSLB License or an Unlicensed "General Handyman"

Any contractor performing work valued over $500 in California must hold a valid CSLB license. Before any other due diligence, go to cslb.ca.gov and verify the license is current, the classification matches the work, and there are no disciplinary actions on record. This takes five minutes and can save you tens of thousands of dollars.

The phrase "general handyman" is a significant red flag for larger projects. Handymen can legally perform minor repairs without a license, but they cannot perform work requiring a license — and they cannot legally bid jobs over $500. A handyman being hired for a $15,000 kitchen remodel is operating outside the law, and your §7031 rights apply.

Red Flag 2 — Demands a Large Deposit Before Work Begins

California law limits home improvement deposits to 10% of the total contract price or $1,000 — whichever is less — before work begins. A contractor who demands $5,000, $10,000, or more upfront before touching your project is either uninformed about California law or is deliberately operating outside it. In either case, it is a significant risk signal.

Legitimate contractors have relationships with material suppliers who extend credit. They do not need your money to buy materials before the job starts. A large upfront demand is a classic indicator of a contractor who intends to take the money, do minimal or no work, and move on.

Red Flag 3 — The Bid Is Dramatically Lower Than Competitors

A bid that is 30–50% below the other bids you received is a warning, not a bargain. Legitimate contractors bid based on actual material and labor costs. A dramatically low bid usually means one of three things: the contractor plans to substitute cheaper materials, they will add excessive change orders once the project has started, or they are not financially viable and may abandon the project.

The lowest bid almost always costs the most in the end when you factor in defective work, project abandonment, and litigation.

Red Flag 4 — No Written Contract or Vague Contract Language

California law requires a written contract for home improvement projects over $500. The contract must include: the contractor's name, address, license number, and phone; a description of the work to be performed and materials to be used; the total contract price; payment schedule; and start and completion dates. A contractor who resists providing a written contract or whose contract is vague and non-specific is creating conditions for future disputes.

"Install new kitchen" is not a contract. "Install 42 linear feet of Shaker-style cabinets per the attached specification sheet, countertops to be 3cm quartz in the selected color, installation to comply with manufacturer specs and applicable building codes" is a contract.

Red Flag 5 — No Permit Discussion for Permitted Work

Most structural work, electrical work, plumbing work, HVAC work, and significant remodeling in California requires building permits. A contractor who suggests you can save money by skipping permits is asking you to take on significant legal and financial risk. Unpermitted work creates problems when you sell, refinance, or make an insurance claim — and the city can require you to tear out and redo the unpermitted work at your expense.

Worse, a contractor who skips permits is avoiding the inspections that would catch defective work. The inspection process exists to protect you, not inconvenience the contractor.

Red Flag 6 — Pressure to Sign Immediately or "Today Only" Pricing

High-pressure sales tactics are a classic indicator of a contractor who knows that further investigation will reveal problems. Legitimate contractors want informed clients — they understand that homeowners who have done their research make better clients. A contractor who needs you to sign today before you can check references, verify their license, or get other bids is not a contractor you want.

California law gives you the right to cancel a home improvement contract within 3 business days (5 for seniors, 7 for disaster repairs). Exercise this right if you have any doubts after signing.

Red Flag 7 — No Insurance or Resistance to Providing Insurance Certificates

Licensed California contractors should carry general liability insurance and, if they have employees, workers compensation insurance. Ask for a certificate of insurance before work begins and verify it is current. A contractor who cannot provide insurance documentation is either uninsured or underinsured — both create significant risk if a worker is injured on your property or if the contractor causes property damage.

Red Flag 8 — Negative Online Reviews Describing Specific Patterns

A few negative reviews among many positives is normal. But a pattern of reviews describing the same problems — large deposits taken with no work following, project abandonment, failure to respond after payment — is a serious warning. Check Google, Yelp, the BBB, and the CSLB's own complaint history at cslb.ca.gov. The CSLB's public record shows formal complaints, disciplinary actions, and citations.

Red Flag 9 — Asks You to Pull the Permit Yourself

A contractor who asks you to pull the building permit as the "owner-builder" is potentially trying to avoid accountability. When you pull a permit as owner-builder, you take on the legal responsibility for the work — including any code violations. The contractor's license is not attached to the permit, and the CSLB has limited jurisdiction over problems that arise. Legitimate contractors pull their own permits.

Red Flag 10 — Cannot Provide References from Recent Similar Projects

Any contractor with legitimate experience should be able to provide three to five references from recent projects similar in scope to yours. A contractor who cannot, or who provides references that are difficult to contact or who give vague responses, is hiding something. Call references directly and ask specific questions: Was the project completed on time? On budget? Any issues with quality? Would you hire them again?