How to Choose a Contractor: Red Flags to Avoid

Hiring a contractor is a bigger financial decision than most homeowners make outside of buying a house, but it rarely gets the same scrutiny. Getting three bids and picking the middle one isn't a strategy. Here's what actually separates a contractor worth hiring from one that turns your remodel into a cautionary tale.

Quick answer: verify the license number yourself with the CSLB, confirm current insurance and bonding, get a written contract with a real payment schedule (never more than 10% or $1,000 down, whichever is less, for a licensed CA contractor), and check references on recent, similar-scope jobs.

Every general contractor in California must carry a license issued by the Contractors State License Board (CSLB), and that license number should be printed on their website, contracts, and vehicles. Don't just take a contractor's word for it. Look up the number yourself on the CSLB's public license check tool, which shows whether the license is active, what classification it covers, and whether there are any disciplinary actions or complaints on file. A contractor confident in their standing will have no problem pointing you to their exact license number and encouraging you to verify it independently.

A license alone doesn't protect you if a worker gets hurt on your property or a job goes sideways. Ask for proof of general liability insurance and workers' compensation coverage, and confirm the policy is current, not expired. California also requires licensed contractors to carry a contractor's bond, which offers homeowners a path to recovery if a contractor fails to complete a job or violates the license law. If a contractor hesitates to share this documentation, treat that as a warning sign rather than a formality to skip.

A verbal ballpark is not an estimate you can hold anyone to. Before any work starts, you should have a written contract that spells out the full scope of work, the materials being used (brand and model where it matters), the total price, the payment schedule, and a realistic timeline. Vague line items like "kitchen remodel - $30,000" leave too much room for disputes over what was actually promised. A contractor who resists putting details in writing is making it easier to walk away from commitments later, not easier for you.

California law caps the down payment a licensed contractor can require at 10% of the total contract price or $1,000, whichever is less. Beyond that initial deposit, payments should be tied to completed milestones, such as after demolition, after rough plumbing and electrical pass inspection, and after final walkthrough, not to arbitrary calendar dates. Never pay for the full job upfront, and be cautious of any contractor who asks you to pay a supplier or subcontractor directly outside of the written contract.

Most structural, electrical, plumbing, and gas-line work requires a permit from the city or county, and a legitimate contractor will pull those permits themselves rather than asking you to do it or skipping them to save time. Unpermitted work can create real problems later: failed inspections, fines, and complications when you eventually sell the home, since buyers' agents and appraisers increasingly flag unpermitted renovations. If a contractor tells you a permit "isn't necessary" for work that clearly involves structural or mechanical changes, get a second opinion before proceeding.

Ask for references from projects completed in the last six to twelve months, not just a contractor's best work from years ago. Call at least two references and ask specific questions: Did the project finish close to the original timeline? Were there unexpected costs, and how were they communicated? Would they hire this contractor again for a similar project? A pattern of vague or reluctant answers from a contractor when asked for recent references is worth paying attention to.

A few signals show up again and again in problem projects: pressure to sign a contract same-day, a bid dramatically lower than every other quote with no clear explanation, requests for large cash payments or payment made out to an individual rather than a business, no fixed business address, and reluctance to provide license, insurance, or bond documentation. None of these alone is automatically disqualifying, but two or more together are reason enough to keep looking.

Choosing a contractor is ultimately about verifiable facts, not gut feeling: a real license you can look up, real insurance you can confirm, a written contract you can hold them to, and recent references you can actually call. Homeowners who skip that verification step are the ones most likely to end up with the horror stories other guides warn about.