10 Red Flags to Watch For Before Hiring a Contractor

Why Red Flags Matter More Than References

Every dishonest contractor has at least a few satisfied customers they can use as references. Red flags, on the other hand, are behavioral patterns that reliably indicate problems — regardless of what references say. Learning to spot these warning signs before you sign a contract or hand over a deposit is the single most effective way to protect yourself from contractor fraud and substandard work.

The Federal Trade Commission and state attorneys general receive thousands of contractor fraud complaints every year. The most common complaints — taking money and disappearing, doing substandard work, abandoning projects mid-way — almost always involve contractors who exhibited multiple red flags before the homeowner signed the contract. The pattern is consistent and predictable, which means it is also preventable.

Red Flag 1: No License Number or Evasive About Credentials

A legitimate, licensed contractor will readily provide their license number. It should appear on their business card, website, truck, estimates, and contracts. If a contractor hesitates, says their license is "in process," claims they do not need one, or gives you a number that does not match any state record, walk away. Verify every license number on LicensedCheck.com or your state licensing board website before proceeding.

Some unlicensed contractors will provide another contractor's license number. When you verify, make sure the name and business on the license match the person and company you are actually hiring.

Red Flag 2: Demands Large Upfront Payment

Many states have laws limiting how much a contractor can collect as a down payment. California limits the initial deposit to $1,000 or 10 percent of the contract price, whichever is less. Arizona limits it to one-third of the contract price. Even in states without specific caps, a contractor who demands 50 percent or more upfront is a significant risk.

Legitimate contractors typically structure payments in stages tied to completion milestones — for example, a deposit to start, a payment when framing is complete, a payment when rough-in inspections pass, and a final payment upon project completion and your satisfaction. This structure keeps the contractor motivated to complete quality work and protects you from losing large sums if the contractor abandons the project.

Red Flags 3–5: Cash Only, No Written Contract, Door-to-Door Solicitation

A contractor who insists on cash payments is trying to avoid a paper trail. This makes it nearly impossible to prove how much you paid if a dispute arises, and it often indicates the contractor is not reporting income or paying required taxes and insurance premiums. Always pay by check, credit card, or electronic transfer so you have a record.

No written contract is another serious warning sign. Every legitimate contractor should provide a detailed written contract before work begins, including scope of work, total price, payment schedule, timeline, warranty terms, and their license number. A handshake deal offers you virtually no legal protection.

Be cautious of contractors who show up uninvited at your door, especially after storms or natural disasters. While not all door-to-door contractors are fraudulent, this is a common tactic used by unlicensed operators and scam artists who target vulnerable homeowners. Legitimate contractors generally do not need to solicit business door-to-door — they have established reputations, referral networks, and online presences.

Red Flags 6–8: Pulling Your Own Permits, Pressure Tactics, No Physical Address

A contractor who asks you to pull building permits yourself is hiding something. Licensed contractors pull their own permits because the permit is issued under their license — they are assuming legal responsibility for the work meeting building codes. If you pull the permit, the contractor avoids accountability and you become legally responsible for code compliance. If inspections fail, the liability falls on you.

High-pressure sales tactics — "this price is only good today," "I have a cancellation and can start tomorrow if you sign now," "materials are going up next week" — are designed to prevent you from doing due diligence. A legitimate contractor understands that you need time to get multiple bids, verify licenses, and review contracts. Urgency is almost always artificial.

A contractor without a verifiable physical business address — just a P.O. Box or cell phone number — is harder to hold accountable if things go wrong. Check for a real office or shop address, a business listing with the state, and a consistent presence in the community. Fly-by-night operations often use temporary phone numbers and P.O. boxes specifically to make themselves harder to locate after taking your money.

Red Flags 9–10: Unusually Low Bids and Bad Reviews

An estimate that is dramatically lower than competing bids usually means the contractor is cutting corners somewhere — cheaper materials, unlicensed subcontractors, no insurance, or they plan to add charges once the project is underway. Get at least three bids for any significant project and be skeptical of any bid that is more than 20 to 25 percent below the others.

Online reviews can be gamed, but patterns are harder to fake. Look for consistent complaints about the same issues across multiple platforms — abandoned projects, unresponsive communication, work that failed inspections, or surprise charges. A single negative review among many positive ones is normal. Multiple reviews describing the same problem is a pattern. Check Google, Yelp, BBB, and your state licensing board's complaint database for a complete picture.

What to Do If You Spot Red Flags

If a contractor exhibits even one of these red flags, proceed with extreme caution. Two or more red flags should end the conversation. The most important step you can take is to verify the contractor's license before signing anything or making any payment. A free search on LicensedCheck.com takes less than a minute and can save you thousands of dollars and months of stress.

If you encounter a contractor who you believe is operating without a license, report them to your state licensing board. Most boards take unlicensed contracting complaints seriously and will investigate. You can also report suspicious contractors to your state attorney general's consumer protection division and your local Better Business Bureau. These reports protect other homeowners in your community from the same risks.