When you are comparing contractor quotes for a kitchen remodel, bathroom update, or room addition, it is tempting to go with the lowest number. But a low bid is only a good deal if the contractor can actually deliver what they promised. The red flags below are concrete, easy to check, and each one points to a real risk you would be taking on.
1. The contractor cannot show a valid California license
California requires general contractors to hold a license from the Contractors State License Board (CSLB). You can look up any license number for free at the CSLB website. An unlicensed contractor cannot legally pull permits, and if something goes wrong on your project, you have almost no legal recourse.
Ask every contractor you interview for their CSLB license number and look it up before the conversation goes any further. Verify that the license is active, that the classification matches the work (a B General Building license covers most residential remodeling), and that there are no disciplinary actions on record.
2. There is no written contract or the contract is vague
A reliable contractor gives you a written proposal that spells out exactly what is included: the scope of work, materials, allowances, payment schedule, and timeline. If a contractor hands you a one-page estimate with nothing but a bottom-line price, you have no protection when disagreements come up.
Vague language like "demo and rebuild bathroom" without specifying tile type, fixture grade, waterproofing method, or what happens if dry rot is found behind the walls is a warning sign. Every ambiguity in a contract is a potential extra charge later.
3. They ask for a large cash deposit upfront
California law limits the deposit a contractor can require before work begins. Asking for a very large portion of the total cost in cash before a single nail is driven is a classic sign of a contractor who may not finish the job, or who needs your money to pay off a previous client's project.
A reasonable payment schedule ties payments to measurable milestones—foundation complete, framing complete, finishes complete—not to calendar dates or the contractor's cash flow needs. Never pay the final amount until the work passes inspection and you are satisfied.
4. They say you do not need permits
Permits exist to protect you. A permitted project is inspected by the city, which means a third party verifies that the structure, electrical, and plumbing work meets code. When you sell your home, unpermitted work can kill a sale, trigger costly remediation, or expose you to liability.
Any contractor who suggests skipping permits to save money or speed things up is asking you to take on that risk entirely. A licensed general contractor should pull the required permits and coordinate inspections as a standard part of the job.
5. The scope of work keeps changing after the quote
Some contractors quote low intentionally, knowing they will make up the difference through change orders once work is underway and you are committed. Watch for quotes that leave out obvious line items—like demolition, haul-away, or finish painting—that any complete job would require.
Ask directly: "What is not included in this quote?" A straightforward contractor will tell you. One who deflects or gets defensive is worth walking away from.
6. They cannot provide proof of insurance
A contractor working on your property without general liability insurance means you could be responsible for damage to your home or a neighbor's property. Without workers' compensation coverage, you could be liable if a worker is injured on your job site.
Ask for a certificate of insurance before work starts. A reputable contractor will provide this without hesitation. If they stall, make excuses, or offer a document that is expired, treat that as a firm no.
7. They pressure you to decide immediately
High-pressure tactics—"this price is only good today," "I have another client ready to take this slot"—are designed to stop you from comparing bids or doing basic due diligence. A contractor confident in their work and pricing will give you time to review the written proposal, check their license, and ask follow-up questions.
Legitimate contractors are busy, but they are not so desperate that they need to rush you into a decision.
Quick checklist: What to verify before signing
| What to check | Green flag | Red flag |
|---|---|---|
| CSLB license | Active, correct classification, no complaints | Cannot provide a number or license is inactive |
| Insurance | Current certificate provided on request | Stalls, refuses, or certificate is expired |
| Written contract | Detailed scope, materials, payment schedule | Verbal agreement or one-line estimate only |
| Permits | Contractor pulls permits as standard practice | Suggests skipping permits to save money or time |
| Deposit amount | Reasonable deposit tied to project start | Large cash deposit demanded before any work |
| Payment schedule | Milestone-based payments | Large payments due on dates regardless of progress |
| Sales pressure | Time to review proposal and ask questions | "Today only" pricing or urgency tactics |
What drives the real cost of a remodeling project
It helps to understand why legitimate bids sometimes look higher than a sketchy one. A properly scoped project accounts for permit fees, licensed subcontractors, quality materials, waste disposal, and the time required to do the work correctly. When a quote is dramatically lower than others, something in that list is usually missing.
Scope, materials, site conditions, and local permit requirements all affect what a project actually costs. Rather than chasing the lowest number, ask each contractor to walk you through their quote line by line. That conversation alone will tell you a lot about how organized and experienced they are.
When you are ready to talk to a contractor you can verify
Once you know what to look for, the vetting process is straightforward. Check the license, ask for insurance, read the contract carefully, and make sure permits are part of the plan. If a contractor clears all of those hurdles, the conversation about your project can be a productive one.
Pacheaco Construction is a licensed California general contractor (CSLB B #635806) serving Alameda and Contra Costa Counties. Mark Pacheaco provides free estimates, written proposals on every job, and coordinates permits as a standard part of every project. Call (925) 443-2628 to set up a no-obligation walkthrough of your project.
Frequently asked questions
How do I verify a contractor's license in California?
Go to the CSLB website and enter the contractor's license number. You can confirm the license is active, check the classification, and see if there are any disciplinary actions or complaints on record. This takes about two minutes and costs nothing.
How large a deposit can a California contractor legally ask for?
California law sets a cap on the initial deposit a contractor can require before work begins. If a contractor asks for a very large portion of the project cost in cash before starting, that is a red flag worth investigating before you agree to anything.
What should a remodeling contract include?
A complete contract should spell out the full scope of work, the specific materials or allowances, a milestone-based payment schedule, the project timeline, and what happens if unexpected conditions are found. Vague language in any of these areas can lead to disputes and extra charges later.
Why does it matter if a contractor pulls permits?
Permitted work is inspected by the city, which independently verifies that structural, electrical, and plumbing work meets code. Unpermitted work can complicate a home sale, create liability, and may need to be torn out and redone at your expense.
Is the lowest bid always the worst choice?
Not automatically, but a bid that is significantly lower than others usually means something is left out of the scope, materials are lower quality, or the contractor is cutting corners on licensing or insurance. Asking each contractor to walk through their quote line by line is the best way to make a fair comparison.