Red Flags When Hiring a Contractor in 2026: What Most Homeowners Miss

What Are the Biggest Red Flags When Hiring a Contractor in 2026?

The biggest red flags are: no verifiable CSLB license, a bid that is 30% or more below the others, a demand for more than 10% upfront, no written contract, and pressure to start immediately. Any one of these alone should give you pause. Two or more together, and you walk away.

As a licensed GC who has completed hundreds of remodels across the Bay Area, I can tell you that homeowners rarely get burned by obviously bad contractors. They get burned by contractors who seem fine at first - who show up on time, speak confidently, and quote a price that feels like a deal. The warning signs are there. Most homeowners just do not know what to look for.

In 2026, contractor fraud complaints filed with the CSLB (California Contractors State License Board) remain in the thousands annually. The CSLB receives over 20,000 complaints per year, and unlicensed activity accounts for a significant portion of those. That is not a small risk. That is a well-documented, recurring problem that costs California homeowners hundreds of millions of dollars.

Here is what to watch for, organized by when you will see it.

How Do I Know If a Contractor's Bid Is Too Low?

If the lowest bid is 25-30% below the other bids you received, that is not a bargain. That is a warning. A bid that low means the contractor is either missing scope, planning to cut corners on materials, or intending to hit you with change orders once work begins.

Get three bids minimum. Not two, not one. Three. Here is why: with three bids, you can see the cluster. Two bids are close together, one is way out. The outlier is your red flag - either someone way too expensive, or someone way too cheap. Both deserve scrutiny.

In my experience building homes across Silicon Valley since 2017, I have seen this play out dozens of times. The homeowner goes with the low bid because it saves $40,000 on paper. Three months in, they have spent $60,000 in change orders on things that were never in the original scope because the contractor deliberately excluded them to win the job.

When you compare bids, go line by line. Ask every contractor to break out:

• Labor vs. materials
• Allowances vs. specified items
• What is excluded from the scope
• Permit fees (yes or no, and who pulls them)

Tools like the free bid comparison tool at Opsite let you upload multiple estimates and see them side by side, which makes spotting missing line items much faster than reading three PDFs on your own.

What Should I Check About a Contractor's License and Insurance Before Hiring?

Check three things: their CSLB license number is active and in good standing, they carry general liability insurance (minimum $1M per occurrence), and they carry workers compensation insurance for their employees. If any of these are missing, do not hire them.

Go to cslb.ca.gov right now and look up their license. Takes 30 seconds. You want to see:

• Status: Active (not expired, suspended, or revoked)
• The contractor's name matches who you are talking to
• The license classification covers your project type (Class B for general contracting)
• No disciplinary actions in their history

According to CSLB complaint data, over 30% of complaints involve contractors whose license had lapsed or who were operating under someone else's license number. A contractor who gives you a license number that belongs to a different company is committing fraud - and you will have almost no legal recourse if things go wrong.

On insurance: ask for a certificate of insurance naming you as an additional insured. A legitimate contractor does this without hesitation. If they push back, that is a red flag. If a worker gets injured on your property and the contractor has no workers comp, you could be liable for the medical bills.

The Opsite contractor trust checker pulls CSLB data and license status automatically, so you can verify any contractor in seconds without navigating government websites.

Which Payment Red Flags Should Stop Me From Signing the Contract?

Three payment red flags should make you walk away immediately: a request for more than 10% down (or $1,000, whichever is less, for projects under $500K - that is California law), a demand for payment in cash only, or a payment schedule that front-loads too much money before major milestones are hit.

California law limits the initial deposit a licensed contractor can request to 10% of the contract price or $1,000 - whichever is lower. This is not a suggestion. It is the law. Any contractor asking for 30%, 40%, or 50% upfront is either unlicensed or willing to ignore the rules. Either way, that is your answer.

As a contractor, I can tell you: I have never needed a large upfront deposit to fund a legitimate project. Materials for the first phase can be financed through supplier credit. If a contractor says they need $30,000 before they buy a single thing, they are using your money to float their other jobs. That is your money funding someone else's project.

A healthy draw schedule ties payments to completed work:

• 10% at signing (or less, per California law)
• 20-25% at demolition and rough framing
• 20-25% at rough mechanical (plumbing, electrical, HVAC)
• 20-25% at drywall and finishes
• 10% at substantial completion
• 10% at final punch list and sign-off

For a deeper breakdown of how draw schedules protect you, read what is a draw schedule and why it matters.

Cash-only demands are almost always a sign that the contractor is not reporting income, not insured, or does not want a paper trail. If something goes wrong, you will have no evidence of what you paid or when. Pay by check or bank transfer. Always.

What Red Flags Show Up Before Work Even Starts?

The clearest pre-construction red flags are: no written contract (or a one-page contract with no specifications), pressure to start "this week" before paperwork is signed, and a contractor who tells you permits are not necessary for your project when they clearly are.

Based on typical project data from Bay Area contractors, projects that start without a permit are 4 to 6 times more likely to require expensive corrections later. Unpermitted work can trigger stop-work orders, require walls to be opened for inspection, and make your home harder to sell. The contractor who says "we don't need a permit for this" is protecting their workflow, not you.

Your contract should include, at minimum:

• Full scope of work in writing
• Material specifications (brand, grade, model where applicable)
• Start date and substantial completion date
• Draw schedule tied to milestones
• A change order clause requiring written authorization for any changes
• A lien waiver clause (so subcontractors cannot lien your property for money your GC failed to pay them)
• Warranty terms

A contract that is missing any of these items is not protecting you. For a full walkthrough of what to look for before you sign, the Opsite contract review tool analyzes construction contracts and flags missing clauses, one-sided terms, and common traps homeowners miss.

From working with homeowners on projects ranging from $50K to $2M+, I can tell you that the phrase "we'll figure it out as we go" from a contractor is never a good sign. Everything should be in writing before a single shovel hits the ground.

What Red Flags Should I Watch for Once Construction Is Underway?

The most serious mid-project red flags are: the crew disappears for days without explanation, your GC is not on site and subcontractors cannot answer questions, you are being asked for additional payments ahead of schedule, and work that has been completed does not match the specifications in your contract.

If your GC takes 48 hours or more to return a text, that is a communication problem. If they go dark for a week, that is a financial problem - they may be kiting money between jobs. A contractor who does not have enough cash flow to run your job properly will delay your project and potentially walk off it entirely.

Watch for scope changes that happen verbally. A contractor who says "while we're in there, we might as well..." and then does the work before getting your written sign-off on the cost is setting you up for an unauthorized change order. Every single change to scope needs a written change order with a price and your signature before work begins on that change.

Based on 2026 construction cost data, the average kitchen remodel change order adds 12-18% to the original contract price. Some of that is legitimate - you discover old wiring that needs upgrading, or you change the tile. But a significant portion comes from contractors who deliberately underbid scope and make it up on the back end. If you are hitting change orders on basic items that should have been in the original scope (like insulation, standard framing repairs, or basic plumbing rough-in), that is a structural problem with your contractor's bidding process.

For more on what legitimate remodel costs look like in the Bay Area, see our breakdown of kitchen remodel costs in 2026.

Frequently Asked Questions

How do I check if a contractor is licensed in California?

Go to cslb.ca.gov and use the license lookup tool. Enter the contractor's name or license number. You want to see status: Active, the classification matches your project type, and no disciplinary actions on file. This takes about 30 seconds and is the single most important thing you can do before hiring anyone.

Is it illegal for a contractor to ask for more than 10% upfront in California?

Yes. California law limits the initial deposit to 10% of the contract price or $1,000, whichever is less, for home improvement contracts. Any licensed contractor who demands more is violating state law. An unlicensed contractor has no such limit, which is one of many reasons you should never hire an unlicensed contractor.

What does it mean if a contractor says I don't need a permit?

It usually means they want to avoid the inspection process, not that you actually do not need one. Permits are required for structural work, electrical changes, plumbing changes, and HVAC work in virtually every California jurisdiction. Unpermitted work can force you to undo completed construction, delay your sale, and create liability. Always pull permits.

How low is too low for a contractor bid?

If the bid is 25-30% below the other bids you received for the same scope, treat it as a red flag. Get all three bids to break down their scope in detail and compare line by line. Low bids are almost always low because of missing scope, underpriced allowances, or planned change orders - not because the contractor is more efficient.

What is a lien waiver and why does it matter?

A lien waiver is a document from your contractor and their subcontractors releasing the right to file a mechanic's lien against your property. If your GC fails to pay their subcontractors, those subs can lien your home even if you paid the GC in full. Requiring conditional lien waivers at each draw protects you from paying twice for the same work.

Should I be worried if a contractor does not have a physical office?

Not necessarily - many legitimate small contractors work out of their truck. But you should be able to verify their license, confirm they have been in business for at least 2-3 years, and find references from completed jobs in your area. A contractor who cannot give you three references from jobs completed in the last 12 months is a concern.

What should I do if my contractor asks for payment in cash?

Decline. Pay by check or bank transfer so you have a documented paper trail of every payment. Cash payments leave you with no evidence of amounts paid or timing if a dispute arises. A legitimate contractor has no reason to require cash.

How many bids should I get before hiring a contractor?

Three is the minimum. Three bids let you see where prices cluster and identify outliers. One or two bids give you no reference point. For projects over $100,000, consider getting four bids to have a cleaner picture of market pricing in your area.