Red Flags When Hiring a Contractor: What to Watch For in 2026

What Is the Number One Red Flag When Hiring a Contractor?

The number one red flag is a contractor who asks for a large cash deposit before work starts. In California, the legal deposit limit is $1,000 or 10% of the total contract price, whichever is less (Business and Professions Code Section 7159.5). That is the law. Any contractor asking for 30%, 40%, or "half up front" is either unfamiliar with California law or is planning to take your money and disappear.

As a licensed GC who has completed hundreds of remodels, I have seen this pattern more times than I can count. A homeowner wires $15,000 as a "materials deposit" on a $50,000 kitchen remodel. The contractor orders some cabinets, shows up for three days, then stops answering the phone. By the time the homeowner contacts the CSLB, the contractor has moved on to the next victim.

"As a contractor, I can tell you that legitimate GCs do not need a massive upfront payment to fund your project. We have credit lines, supplier accounts, and established relationships. When a contractor says they need 40% to buy materials, that tells me they have cash flow problems - and you do not want your project to be their bank."

Here is the full list of red flags ranked by severity. If you see more than two of these, walk away.

How Do I Verify a Contractor's License in California in 2026?

Go to cslb.ca.gov right now and look up their license. Takes 30 seconds. Do not skip this step. Do it before you meet with them, not after you sign anything.

Here is exactly what to check on the CSLB license lookup:

• License status: Must say "Active." Anything else - suspended, expired, revoked - is a hard stop.
• Classifications: A general contractor doing plumbing-only work, or a plumber running a full kitchen remodel without a B-General license, is operating outside their scope.
• Bond status: California requires a $25,000 contractor bond. That sounds like a lot until you realize a $25,000 bond offers almost no real protection on a $150,000 whole house remodel. But an unbonded contractor is automatically disqualified.
• Workers compensation: If they have employees and no workers comp, you are liable if a worker gets hurt on your property. No exceptions.
• Disciplinary actions: Any citations, accusations, or judgments show up here. One complaint is not necessarily disqualifying - construction is adversarial and sometimes complaints are frivolous. But three complaints against a contractor with 10 completed projects is a pattern.

According to CSLB complaint data, unlicensed contractors account for a significant portion of homeowner complaints each year in California. The department receives tens of thousands of complaints annually - and the majority involve either unlicensed work or licensed contractors who violated the terms of their contracts.

If you want ongoing monitoring - not just a one-time lookup - tools like the free CSLB check at homeowners.useopsite.com/check let you verify a contractor's license instantly and sign up for alerts if anything changes on their record.

Should I Worry If a Contractor's Bid Is Way Lower Than the Others?

Yes. The low-ball bid is not a deal. It is a warning sign.

Get three bids minimum. Not two, not one. Three. And if the lowest bid is 30% or more below the other two, that contractor will either do the work badly, hit you with change orders until the final price matches the competition anyway, or both.

Based on 2026 construction cost data, a full kitchen remodel in the Bay Area runs between $75,000 and $150,000 depending on scope and finishes. If two contractors bid $95,000 and $110,000 and the third bids $58,000 for the same scope, there is only one explanation: the $58,000 bid is missing something. Maybe they are not pulling permits. Maybe they are using subcontractors who are not CSLB-licensed. Maybe the scope is vague enough that they will charge you for everything that "was not included."

In my experience building homes across Silicon Valley since 2017, I have seen the change order trap play out hundreds of times. The low bidder wins the job, then charges extra for permits, for unexpected conditions behind the walls, for material upgrades the homeowner "chose" - and the final price ends up 20-40% higher than the original low bid. At that point you have no leverage, because you already signed a contract and demo has started.

"As a contractor, I can tell you that comparing bids fairly requires apples-to-apples scope. Two bids that look the same on the surface can be wildly different underneath. One includes a $4,000 permit allowance; the other assumes you will pull permits yourself. One uses union electricians; the other uses a handyman with an electrical license. The only way to know is to read every line."

If you want a professional analysis of your contractor bids - including which one is priced fairly for your market - the Opsite bid comparison tool runs an AI-powered background check and ranking on up to five contractors, pulling permit history, CSLB status, and market pricing data. It costs $49 and has caught red flags that homeowners missed completely.

What Are the Warning Signs in a Contractor's Estimate?

A vague estimate is a setup for change orders. If the estimate does not answer these five questions, send it back.

1. Is the scope specific? "Kitchen remodel" is not a scope. "Remove and replace 22 linear feet of upper cabinets, 18 linear feet of lower cabinets, 28 square feet of quartz countertops, LVP flooring throughout 210 SF" is a scope. Vague language like "as needed," "to be determined," or "allowance" without a dollar figure means the contractor has not committed to what you think they have committed to.

2. Is there a permit line item? Permits for a kitchen remodel in most California cities run $1,500 to $4,000. If the estimate does not include a permit line, either the contractor plans to skip permits (which means unpermitted work that could cost you when you sell) or they plan to charge you for it later as a surprise.

3. Are allowances defined in dollars? An allowance is a budget set aside for items not yet selected - tile, fixtures, appliances. "Tile allowance included" is not a number. "$8/SF tile allowance for 180 SF backsplash" is a number. If you pick $22/SF tile, you pay the difference. If you pick $4/SF tile, the contractor pockets the difference. Know the allowance amounts before you sign.

4. What is the payment schedule? A compliant draw schedule ties payments to completed milestones - not to calendar dates. If the payment schedule says "$15,000 on signing, $15,000 on week 2, $15,000 on week 4," that is front-loaded and does not protect you. Payments should match work completed. For more on how payment schedules protect homeowners, see our full guide on draw schedules in construction.

5. Is there a completion date? "Approximately 8 weeks" is not a completion date. A start date and a substantial completion date written into the contract is a completion date. No date means no accountability.

How Do I Spot a Contractor Who Will Abandon My Project?

There are behavioral red flags that show up before work starts - if you know what to look for.

Communication: If your contractor takes 48 hours or more to return a text or call during the bid phase, that is exactly how they will communicate during the project. I have never seen a contractor who was slow to respond before signing suddenly become responsive after you hand them a check.

References: Ask for three references from the last 12 months. Not five-year-old references. Not references for a different type of project. If they cannot produce three recent clients willing to talk to you, that is a red flag. Call the references. Ask one specific question: "Did the project finish on time and on budget?" The answer will tell you everything.

Their subcontractors: A general contractor is only as good as the subs they bring in. Ask who does the plumbing, electrical, and HVAC. Ask if those subs are licensed. From working with homeowners on projects ranging from $50K to $2M+, I can tell you that the most common source of construction defects is not the GC directly - it is unlicensed or underqualified subcontractors doing trade work without oversight.

Pressure tactics: Any contractor who tells you the price is only good for 48 hours, or that they have another homeowner ready to take your slot, is using a sales tactic. Legitimate contractors do not run out of slots because they manage their backlog professionally. Pressure to sign fast is designed to prevent you from doing your homework.

No written contract: This one should be obvious, but I still hear it. "He seemed trustworthy so we just shook on it." No. In California, any home improvement contract over $500 must be in writing by law. A contractor who suggests doing it on a handshake is either ignorant of the law or is trying to avoid the protections a written contract gives you.

What Happens If You Hire a Contractor With These Red Flags?

The outcomes range from expensive to catastrophic.

From working with homeowners on projects ranging from $50K to $2M+, here is what I have seen happen to people who ignored red flags:

• Contractors who took large upfront deposits and disappeared - leaving homeowners with a half-demolished kitchen and no recourse except a CSLB complaint that takes 12-18 months to resolve.
• Unpermitted work discovered during a home sale, requiring $30,000-$80,000 in remediation to bring the project to code.
• Mechanic's liens filed by unpaid subcontractors against the homeowner's property - even after the homeowner paid the GC in full.
• Change orders that inflated a $90,000 project to $140,000, with no documentation of what was authorized when.

The CSLB Recovery Fund covers up to $40,000 per project for homeowners damaged by licensed contractors - a number most homeowners do not know exists. But filing a claim requires documentation of everything: the contract, every payment, every communication, every change order. Homeowners who kept records recovered. Homeowners who did not, did not.

Add 15-20% contingency to your budget before any project starts. Not 10%. Every project hits something unexpected - rot behind a wall, outdated electrical that needs upgrading to code, a permit that takes six weeks instead of two. The contingency is not pessimism. It is the cost of operating in the real world.

If you want to know how contractors think about estimating, the guide on how much a kitchen remodel actually costs breaks down the numbers from the contractor's side - which is the only way to spot when you are being overcharged.

And if you are already at the contract stage and want a second set of eyes before you sign, the Opsite contract review runs a 25-clause AI analysis of your specific contract - checking for the deposit cap violation, missing right-to-cancel language, front-loaded payment schedules, and 22 other issues that are standard in predatory contracts. It costs $199 and has identified critical problems in the majority of the contracts homeowners have submitted.

Frequently Asked Questions

Is it a red flag if a contractor does not have a website?

Not automatically - some excellent small GCs operate entirely by referral and have no web presence. What matters is: can they verify their CSLB license, provide three references from the last 12 months, and show you past project photos? A missing website with all three of those things is fine. A missing website plus no references plus a request for a large cash deposit is a serious problem.

Can I hire an unlicensed contractor to save money in California?

Legally, you can hire an unlicensed contractor for work under $500. For anything above that, the contractor must be CSLB-licensed. Beyond the legal requirement, hiring unlicensed means no bond, no workers comp (you are liable for injuries on your property), no CSLB protection if something goes wrong, and potential problems when you sell your home if permits were not pulled.

What is a fair deposit for a contractor in California?

The legal maximum in California is $1,000 or 10% of the total contract price, whichever is less. On a $80,000 kitchen remodel, that means the legal maximum deposit is $1,000 - not $8,000. Any contractor asking for more than this amount is violating California Business and Professions Code Section 7159.5.

How many bids should I get before hiring a contractor?

Get three bids minimum. Not two, not one. Three. Three bids give you a market baseline so you can identify outliers in both directions - the low-ball bid that will hit you with change orders, and the overpriced bid from a contractor who does not want the work. With two bids you have no reference point.

What should I do if a contractor refuses to provide their license number?

Walk away immediately. Every licensed contractor in California has a public CSLB license number. There is no legitimate reason to withhold it. Refusal to provide a license number means they are either unlicensed or their license is suspended, expired, or under discipline.

How long does it take to file a CSLB complaint?

Filing a CSLB complaint takes about 30 minutes online at cslb.ca.gov. Resolution takes significantly longer - typically 6 to 18 months depending on the complexity and whether the contractor contests the complaint. Document everything from day one: every payment, every text, every change order. The CSLB will ask for all of it.

Is it a red flag if a contractor wants to skip permits?

Yes. Skipping permits is not just a building code violation - it becomes your problem when you sell. Unpermitted work must be disclosed. Buyers can demand you bring it to code before closing, or discount the offer to cover the cost. In the Bay Area, bringing unpermitted additions to code can cost $30,000 to $80,000 depending on scope. Any contractor who suggests skipping permits to save time or money is protecting themselves, not you.

What is the difference between a general contractor and a specialty contractor?

A general contractor (B-licensed in California) can oversee and coordinate all aspects of a construction project, including hiring subcontractors. A specialty contractor has a specific trade license - C-36 for plumbing, C-10 for electrical, C-20 for HVAC. A specialty contractor cannot legally act as the project GC and manage other trades unless they also hold a B license. If a plumber tells you they can run your whole kitchen remodel, check their CSLB license classification.