Problems with contractors tend to arise before the work starts. Homeowners that end up in disputes over unfinished work, unexpected charges, or damage to their property almost always skipped something in the hiring process. Price should be a guideline, but it can’t support the entire framework.
Quick Answer
A contractor worth hiring should provide the following before work starts: a verifiable license for the trade and state, current general liability and workers’ compensation insurance, a written contract with a detailed scope of work, a clear payment schedule tied to milestones, and references you can actually call. Any contractor who resists providing any of these is telling you something useful before the job begins.
What to Look for in a Contractor: The Basics Most Homeowners Skip
Most homeowners get three quotes, read a few reviews, and go from there. That process emphasizes price and reputation, which are important metrics, but misses some important credentials. Those credentials determine whether a contractor is legally allowed to do the work, insured if something goes wrong, and accountable when the job doesn’t go to plan.
None of this is complicated; most credentials take an hour to check. Despite that, most homeowners don’t because they don’t know what to look for. Or, they assume a referral from a neighbor is good enough. Referrals do make good starting points, but it is not a substitute for verifying a license or requesting insurance certificates.
Licensing vs. Registration: Why the Difference Matters
In most states, “licensed” and “registered” are not the same thing. A registered contractor has filed paperwork with the state and paid a fee. A licensed contractor has passed trade exams, met documented experience requirements, and in many states carries a surety bond that provides financial recourse if the work fails or the contractor abandons the job.
The distinction matters most in the trades. A general contractor registration doesn’t cover a plumber performing drain work or an electrician running new circuits. Those trades carry separate licenses in most states. Licensed plumbing contractors who carry permits and insurance as a baseline represent what proper trade credentialing looks like. This isn’t some premium feature, but the minimum a homeowner should expect before anyone opens a wall.
Most states provide an online license lookup. Search “[your state] contractor license verification” and confirm the license is active, covers the trade being performed, and lists the company name you were given. A contractor who provides a license number that doesn’t match their company name, or whose license has lapsed, shouldn’t work on your home.
Understanding the lead exposure risks that emerge when unlicensed work disturbs older paint is one reason licensing matters beyond legal compliance. Some credentials exist specifically to protect the people living in the home, not just the job site.
Insurance: The Two Policies That Actually Protect You
Two insurance certificates matter before any contractor starts work: general liability and workers’ compensation.
General liability covers damage to your property during the project. If a crew member drops something through a floor, cracks a foundation wall during excavation, or causes water damage by cutting the wrong pipe, it’s covered by general liability. Without it, the claim falls on the homeowner’s policy.
Workers’ compensation is the one most homeowners don’t think about. If a crew member is injured on your property and the contractor doesn’t carry workers’ comp, you can be held liable for their medical costs and lost wages. This happens more often than most people think.
Request the certificates directly from the contractor’s insurer, not as a copy from the contractor. It’s easy to doctor expired certificates. So, a direct email or call to the insurance company takes five minutes and confirms coverage is active and the policy limits are real.
How to Read a Contractor’s Experience and Track Record
A contractor who has completed five hundred bathroom remodels has solved problems you haven’t encountered yet. One with broad experience across all trades but limited depth in any of them may underestimate complexity that a specialist would have priced correctly from the start. Years-in-business figures matter, but less than the specific volume and type of work done in that time.
A license tells you what a contractor is permitted to do. Their track record tells you what they actually do on the job. The two are not always the same.
Specialisation also matters for certifications. A contractor who primarily works on pre-1978 homes should carry EPA lead certifications. One who regularly handles mold remediation should have documented training. When a contractor’s stated specialty and their certifications don’t align, ask why.
References, Reviews, and Red Flags
References don’t mean much if they don’t get used. Most homeowners request them and never call. The ones who do call often ask the wrong questions. For example, “were you happy with the work?” produces a vague yes or no. That can be helpful, but it’s not much to go on.
These questions produce useful information: Did the project finish within the original budget? If costs changed, was the change order explained before the work was done? Were the same crew members on site daily or did the team keep changing? Did the contractor communicate when problems came up, or did you have to chase them?
Online reviews tell a different story. Look for patterns in the negatives rather than the absolute score. A contractor with a 4.2 average and consistent complaints about communication is giving you a preview of what the project will feel like. A contractor with a 4.8 average and one angry outlier is a different situation.
The same patterns that surface in home inspections often trace back to contractor decisions: shortcuts taken under drywall, improper flashing, plumbing not tied in correctly. A contractor’s references and reviews are the clearest window into whether they make those decisions.
Be wary of any bid that comes in much lower than others. Contractors might underbid because they’re planning to squeeze more money out of clients. They might do that via change orders once the homeowner is committed mid-project, by substituting cheaper materials than specified, or by using unlicensed subcontractors who work faster and cheaper because they carry no insurance or training requirements.
No physical business address isn’t immediately a red flag, but it is something to make note of. There’s nowhere to serve legal papers if the job goes wrong, verify a license with a state board that requires a registered address, or reach the contractor after they’ve stopped returning calls. A contractor operating out of a van, with only a mobile number to contact them isn’t always dishonest. But they are, by design, harder to hold accountable if it comes to that.
Other flags worth taking seriously: pressure to sign before you’ve had time to review the contract, requests for full payment upfront, and no written agreement offered at all.
What to Look for in a Contractor’s Written Agreement
A written contract resolves every dispute that comes up during the job before it comes up. In the end, these disputes come down to one question: what did we agree to? Without a written agreement that answers that question specifically, the answer is whatever each party remembers, and those memories probably won’t match.
Painting contractors who offer a written compliance checklist before quoting give homeowners a concrete basis for comparing bids. Without that document, a low bid and a high bid are often describing different jobs, and the homeowner has no way to know which is which until the work is finished.
A Scope of Work Does More Than Describe the Job
A proper scope of work specifies materials by brand and product specification, the sequence of work, who handles permits, what constitutes completion of each phase, and what the change order process looks like. It can’t just say “paint the exterior.” How is that enforceable? Homeowners need a document both parties can refer to. Thus, it should specify surface prep method, primer, product name, number of coats, and daily cleanup procedure.
Window and exterior contractors who put their installation process in writing before work begins give homeowners a reference point if questions arise mid-job. It also proves the company has done this work enough times to have a documented standard for it.
Pay special attention to change orders. Almost every project encounters something unexpected. The question is whether the contractor communicates the change and its cost before doing the work, or after. A contractor who does extra work and then invoices for it has removed your ability to decide whether the work was necessary or worth your money.
Payment Terms: What Normal Looks Like
A standard payment structure for most residential projects runs as follows: a deposit of no more than 10 to 30 percent to secure the start date and cover initial materials, progress payments tied to specific completed milestones, and final payment on completion after a walkthrough. Some states cap the deposit by law. Check this before signing.
Paying in full before work is complete removes your leverage if the job is finished badly or not finished at all. Cash-only payment removes your record. Both are patterns that consistently appear in contractor fraud cases.
Lien waivers are worth knowing about. A subcontractor or materials supplier who isn’t paid by your contractor can file a lien against your property even if you paid the contractor in full. Requesting a lien waiver from each subcontractor at each payment milestone is the way to close that exposure. A reputable contractor will know what a lien waiver is and will have no problem providing them.
What Contractor Certifications and Training Actually Mean
Certifications are not interchangeable, and not all them are relevant to every project. But knowing which ones apply to your specific job, and whether your contractor carries them, can be a secret weapon during the hiring process.
EPA Renovation, Repair, and Painting certification — EPA RRP — is required by federal law for contractors working on pre-1978 homes with lead paint. The certification covers safe work practices, containment, and cleanup procedures that protect occupants during the project. A contractor performing demolition, sanding, or window replacement in an older home without this certification is creating liability for themselves and the homeowner. This is why lead dust sampling is a required part of renovation work in older homes. The risk doesn’t disappear just because the contractor didn’t test for it.
OSHA 10 and OSHA 30 cards indicate the holder has completed federal safety training. They don’t certify a contractor to perform specific trades, but they indicate the crew has been trained in site safety standards.
Mold remediation certification and asbestos supervisor certification each need passing exams and documented field experience. A contractor who performs mold or asbestos work without them is working without the training that makes those jobs safe for the home’s occupants.
Homeowners can get a clearer sense of what these certifications actually need by looking at contractor training programs covering EPA lead, mold remediation, and OSHA safety. The course requirements alone show how much documented knowledge is expected before a certification is issued.
Questions to Ask Before Anyone Signs Anything
Most contractors doing this job properly will answer all these without hesitation. The ones who hedge, deflect, or get defensive are telling you something.
- Are you licensed in this state for this specific type of work, and can I verify it through the state licensing board?
- Can you have your insurer send general liability and workers’ comp certificates directly to me?
- Who will be on site daily? Are they your direct employees or subcontractors? If subcontractors, who selects and supervises them?
- How do you handle change orders? What triggers one and what does the approval process look like before the extra work is done?
- What certifications does your crew carry that are relevant to this project?
- What does your payment schedule look like, and will you provide lien waivers at each payment stage?
- Can you provide three references from projects like this one completed in the past year?
There are certain starting lines for projects involving specific trades. Some specific questions worth asking a remodeling contractor go further into the sequencing, material, and timeline decisions that fuel a project.
Frequently Asked Questions
What insurance should a contractor have before starting work?
At least, general liability and workers’ compensation. General liability covers property damage during the project. Workers’ comp covers crew injuries on your property. Request both certificates directly from the insurer, not as copies from the contractor.
What is a lien waiver and do I need one?
A lien waiver is signed by a subcontractor or supplier confirming they have been paid and waiving their right to file a lien against your property. Without lien waivers, unpaid subcontractors can place claims on your home even if you paid the general contractor in full.
What are the biggest red flags when hiring a contractor?
A bid far below all others with no explanation, no physical business address, pressure to sign before reviewing the contract, full payment required upfront, and no written agreement offered. A low bid and a missing address are the two flags that most consistently predict problems.
Should I always get three bids?
Three bids give a useful comparison, but only when each describes the same scope of work. Without a written spec, low bids often describe a different job entirely. Get three bids against the same written scope, then compare.
How do I verify a contractor’s license?
Most states maintain an online lookup through the contractor licensing board or department of consumer affairs. Confirm the license is active, covers the trade being performed, and matches the company name you were given.
The Hour You Spend Before Signing
Verifying a license takes ten minutes. Requesting insurance certificates takes five. Reading a contract takes thirty. Repaying the costs of neglecting these could take years, or even a lifetime. Most contractor problems that end in disputes, liens, or abandoned projects could have been identified in that hour.
The homeowner who does that work before signing is not being difficult.
Find the Right Contractor for the Job
The most common contractor dispute pattern is straightforward. There’s no written scope, a payment made in full or close to it before completion, and a contractor who becomes difficult to reach once the money is in hand. The homeowner has no document to point to, no leverage to withhold, and no clear recourse. The hour of vetting described above is how homeowners protect themselves from that.
Sources
How to Avoid a Home Improvement Scam — Federal Trade Commission
Checklist to Ask Your General Contractor — FEMA
Renovation, Repair and Painting Program — U.S. Environmental Protection Agency
10 Tips on Hiring and Working with a Contractor — Maryland People’s Law Library
