7 Red Flags That Reveal a Bad Contractor Before You Sign
Pat Melson, Owner & CEO, Midtown Home Improvements ·
After 35 years in home improvement — serving homeowners across St. Louis, Chicago, Nashville, Atlanta, and Kansas City — I've watched a lot of good people hand money to the wrong contractor. Not because they were careless. Because they didn't know what to look for before the work started.
That's the cruelest part of contractor fraud: by the time you realize something's wrong, your deposit is gone and your project is stalled. The National Insurance Crime Bureau reported that contractor fraud rose 38% between 2023 and 2025. The Better Business Bureau continues to rank home improvement among the top three industries for consumer complaints nationwide.
So before you call anyone for your next project, read this first.
Key Takeaways
- Contractor fraud rose 38% from 2023 to 2025, costing homeowners billions annually (NICB, 2025).
- The BBB recommends never paying more than 25% upfront before work begins.
- Seven specific warning signs — all visible before you sign — can protect you from the most common scams.
- Legitimate contractors welcome scrutiny; bad ones resist it.
Red Flag #1: No Physical Address — or Only a PO Box
In 2025, the California Contractors State License Board received over 20,500 complaints — a 19% jump from the prior year — and a disproportionate share involved contractors with no verifiable business address (CSLB, 2025). That pattern holds across every state we operate in.
A PO box is not a business address. It's an anonymity tool. A contractor with no physical location has no showroom you can visit, no neighbors who know them, and no community stake in their reputation. When the job goes sideways, they simply stop answering.
What it looks like in practice: You search the company name and find only a Facebook page and a phone number. The "contact" page on their website lists a PO box. When you ask directly, they say they "work from home."
What a legitimate contractor looks like: A real business address on the website, on the contract, and on their license — all three matching. At Midtown Home Improvements, our offices are in St. Louis, Chicago, Nashville, Atlanta, and Kansas City. We've had the same address in St. Louis since 1990. If a contractor can't tell you exactly where they operate from, that's your answer.
What to do: Ask for the physical business address up front. Search it on Google Maps. If the address doesn't exist, leads to a UPS Store, or produces zero results, walk away.
Our experience: We've had homeowners call us after losing thousands to companies with nothing but a cell number and a truck. In every case, the contractor had no verifiable address and no local history. The lack of a fixed location is the single fastest disqualifier we know.
Red Flag #2: Requires Full Payment — or a Large Deposit — Before Work Begins
The BBB warns homeowners explicitly: never pay more than 25% of the project total before work begins (BBB, 2026). Fraudsters collect a large down payment, start demolition, and vanish before finishing. In one Kansas case documented by BBB, a homeowner paid a company upfront for a painting job — the crew never returned.
That pattern isn't a coincidence. It's the business model.
Why it works on homeowners: Scam contractors justify the full upfront payment with material costs, supplier requirements, or "company policy." These reasons sound plausible. They're not. Legitimate contractors manage their cash flow through supplier accounts, drawn-down schedules, and credit lines — not by front-loading risk onto you.
What a legitimate payment schedule looks like: A deposit of 10–25% at contract signing, progress payments tied to defined milestones (foundation poured, framing complete, rough-in inspected), and a final payment held until punch-list items are resolved and you've done a final walkthrough. This structure protects both parties. Any contractor who won't accept it is signaling something.
What to do: Never pay more than 25% before a single nail is driven. If they say they can't start without more, find someone who can. Material suppliers extend credit to licensed, insured contractors. If they don't have that relationship, that's another data point.
Red Flag #3: No Written Contract — or a Contract With Blank Spaces
A verbal agreement means nothing when a dispute arises. But a written contract with blank spaces — project scope left vague, materials unspecified, completion date missing — is often worse. It's a document designed to lock you in while keeping the contractor's obligations undefined.
What we've seen: The most dangerous contracts aren't the ones with no paper at all. They're the ones with paper that says nothing. "Remodel kitchen" with no scope detail, no material specs, no timeline, and no permit responsibility clause gives a contractor room to do half the work and argue they're done.
In Missouri, Illinois, Tennessee, and Georgia, home improvement contracts above a certain dollar threshold are legally required to include scope, start and end dates, payment schedule, and contractor license information. Vague contracts can void homeowner protections under those statutes.
What a legitimate contract includes:
- Full legal name and license number of the contractor
- Business address (physical, not PO box)
- Detailed scope of work — materials by brand, model, or spec grade
- Start date and substantial completion date
- Itemized payment schedule tied to milestones
- Who pulls permits and who pays for them
- Change order process and written approval requirement
- Warranty terms in plain language
What to do: Read every line before you sign. If there are blank spaces, ask why. If they say "we'll fill that in later," that's a no. Get it in writing before a single item is purchased.
Red Flag #4: Can't Produce Proof of License and Insurance on the Spot
Every state where we operate requires home improvement contractors to be licensed. Illinois, Missouri, Tennessee, and Georgia each maintain public license lookup databases. Insurance — both general liability and workers' compensation — is equally non-negotiable.
Why does this matter so much? If an unlicensed contractor's worker is injured on your property, you may be liable. If they damage your home, their lack of insurance means you absorb the loss out of pocket. Recovery funds exist in some states, but they're typically capped at $20,000 — far below what a major project can cost.
The ask is simple and fair: "Can I see your license number and a current certificate of insurance?" A legitimate contractor hands those over immediately. A fraudulent one stalls, changes the subject, or says the paperwork is "at the office" and they'll send it later.
From 35 years in the field: I've never had a single legitimate contractor on any of our job sites who couldn't produce proof of license and insurance within minutes. Not one. If a contractor hesitates on this request, the conversation is over.
What to do: Get the license number, then verify it yourself on the state licensing board website. Don't just accept a photo of a license card. Look it up. Verify the expiration date and the name on the license matches the company name on your contract.
Red Flag #5: Out-of-State Storm Chasers With No Local License
Every major hailstorm, tornado, or flood triggers the same wave of out-of-state contractors driving through neighborhoods. Since 2005, the National Center for Disaster Fraud has received over 70,000 complaints involving post-disaster contractor fraud (NCDF, 2025). Following Hurricane Harvey alone, an attorney general's fraud hotline received 550 complaints in four days.
The pitch sounds helpful: they've "already assessed your roof," they're "in your neighborhood doing work for your neighbors," and they can "start tomorrow." The problem isn't that they knocked on your door — it's that the credentials are usually not there.
The real red flag isn't the knock — it's what they can't produce: A legitimate local contractor can hand you a state license number, a certificate of insurance, and a verifiable local business address on the spot. Out-of-state storm chasers typically have none of these. They arrived specifically to capitalize on the disaster, with no local license, no local insurance, and no accountability once they leave.
What to do: Before agreeing to anything, ask for three things: the contractor's state license number, a certificate of insurance, and a physical local business address. Verify the license on your state's licensing board website before the conversation goes further. An out-of-state license does not authorize work in Missouri, Illinois, Tennessee, or Georgia. A fully licensed local contractor will hand all three over without hesitation and expect you to check.
Red Flag #6: Signing Before You've Verified Credentials
Any contractor — regardless of how they reach you or what timeline they present — becomes a red flag the moment they discourage you from verifying their license, confirming their insurance, or reviewing the written contract before signing.
High-volume, high-quality home improvement companies run full project schedules. An installation slot that's open today may not be available next week. That's real. The fraud pattern isn't urgency — it's urgency combined with credentials that don't hold up to a five-minute check.
The distinction that matters: A contractor with 35 years in business, a verifiable local address, and 1,000+ Google reviews has earned a full calendar. When they say a slot is available now, that's a real schedule — not a trap. An operator who appeared after a storm with an out-of-state license plate and no verifiable local presence manufacturing urgency before you've checked anything is a completely different situation.
Complete credential verification before you commit: License active on your state's licensing board? Certificate of insurance confirmed directly with the carrier? Written contract reviewed line by line with scope, materials, timeline, and payment schedule all specified? If all three are in hand, making a timely decision with a well-established contractor is smart. The fraud is signing without those boxes checked — not the presence of a schedule.
What to do: When a contractor presents a timeline for your decision, treat it as a prompt to complete your verification — not a reason to skip it. A contractor whose credentials hold up under a quick license check and whose contract is complete and clear is one worth committing to.
Red Flag #7: An Unusually Low Bid With a Vague Scope
The truth about low bids: In 35 years, I've never seen a legitimately low bid that didn't have a catch. If a contractor is substantially below market, one of three things is true: they're unlicensed (so they're cutting overhead illegally), they're planning to cut material quality mid-project, or the scope is written vaguely enough that they'll walk away before finishing and claim the contract is complete.
This doesn't mean the lowest bid is always wrong. It means that if a bid is 30–40% below the other estimates and the scope description is thin — "replace roof," "remodel bathroom," "repair foundation" — you should ask very specific questions before accepting it.
Questions that separate real bids from lowball bids:
- What brand and grade of materials are you using?
- Will you pull the required permits, and is that cost included?
- What's your process if you discover additional damage once work begins?
- Can I speak with three homeowners you've completed similar work for in the past 12 months?
A contractor who can answer all four questions in writing, with specifics, is bidding to do real work. One who can't — or who gets evasive when you ask about permits — is bidding on the deposit.
What to do: Make sure any bid you receive specifies materials by brand and grade, includes permit responsibility, and breaks out every line item. If a number comes in dramatically lower than you expected, ask the contractor to walk you through exactly how they're achieving it. Vague scope language in a low bid is almost always the mechanism for scope creep or shortcuts later.
What Good Looks Like: The Legitimate Contractor Checklist
Before you hire anyone for a home improvement project, confirm all of the following:
- Physical business address verified on Google Maps and matching the license
- License number verified through your state licensing board's public database
- Current certificate of insurance — general liability and workers' comp — with your name added as additional insured for the project
- Written contract with full scope, materials, timeline, payment schedule, and permit responsibility
- Payment schedule capped at 25% down, milestone-based draws, final payment at completion
- References — real homeowners, recent projects, same type of work
- Credentials verifiable before you sign — license active, insurance confirmed, contract complete
questions to ask before hiring a contractor
Frequently Asked Questions
How much should I pay upfront to a home improvement contractor?
The Better Business Bureau recommends no more than 25% of the total project cost as a deposit before work begins. Legitimate contractors structure payments around milestones — not front-loaded lump sums. A request for more than 33% upfront is a warning sign worth investigating before signing.
What should I do if a contractor approaches me door-to-door after a storm?
Do not sign anything at the door. Get their license number, verify it with your state licensing board, and confirm they hold a current license in your state — not just their home state. Then independently contact a local contractor you've researched.
Are unlicensed contractors always trying to scam me?
Not always — but hiring an unlicensed contractor shifts significant legal and financial risk to you. If their worker is injured on your property, if they damage your home, or if they walk off the job, your recourse is limited. State recovery funds are typically capped at $20,000. Licensed contractors carry the insurance and bonding that protect you if something goes wrong.
How do I verify a contractor's license?
Every state maintains a public license lookup database. Search "[your state] contractor license lookup" to find it. Enter the contractor's name or license number and verify that the license is active, not expired, and matches the legal business name on your contract.
What's the difference between a vague scope and a detailed one?
A vague scope says "replace roof." A detailed scope says: "Remove and dispose of existing 3-tab shingles; install 30-year architectural shingles (GAF Timberline HDZ, Charcoal); replace all drip edge; install ice-and-water shield per code in valleys; replace all pipe boots; pull permit through [City] Building Department; warranty 10 years labor, 30 years materials." The detail is the protection.
how to read a home improvement contract
The Bottom Line
None of these red flags require legal expertise to spot. They're visible before you sign anything, before any work starts, and before any money changes hands. The contractors who make your project a nightmare almost always show at least two or three of these signs up front — homeowners just don't know to look.
After 50,000+ installs across five metro markets, we've built our reputation on being the kind of company that welcomes every one of these questions. We hand over our license numbers, insurance certificates, and references before you ask. Our schedules are real, our credentials are verifiable, and our contracts are complete before anything gets signed. Every detail in writing.
If a contractor makes you feel like asking these questions is rude or excessive, that's your answer.
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Midtown Home Improvements, Inc. has served homeowners since 1990 across St. Louis, Chicago, Nashville, Atlanta, and Kansas City. Veteran-owned and operated.