Reviews are a weak signal on their own. They are easy to seed, they skew toward the loudest experiences, and they say nothing about whether a company is financially stable or properly insured. The checks below take a couple of hours across the whole shortlist and they are the ones that hold up when something goes wrong.
Verify the license yourself
Licensing is handled at the state level and sometimes at the county or city level, and requirements vary enormously by trade. Electrical and plumbing work is licensed nearly everywhere. General contracting is licensed in many states and not in others. Find your state's contractor licensing board website, search the company name and the license number from the proposal, and confirm three things: the license is active, it covers the type of work you are buying, and it is held by the entity that will sign your contract.
That last point matters. A salesperson may hand you a card with one business name while the contract names a different LLC. The license needs to match the contract.
Get the insurance certificate from the insurer
Ask for a certificate of insurance showing general liability and, if the company has employees, workers compensation. Then ask that it be sent directly from their agent or carrier with your name listed as certificate holder. A PDF forwarded by the contractor can be out of date or edited. This is a routine request in the trade and no legitimate company will object.
Ask for references from jobs that are two years old
Everyone can supply three delighted customers from last month. The interesting references are the ones from two or three years ago, because they tell you what happened after the punch list, whether the workmanship warranty was honored, and whether callbacks were answered. Ask those references one specific question: was there anything that needed fixing later, and how did the company handle it?
Look at the payment schedule before the price
Payment structure tells you about a contractor's cash position. A reasonable schedule has a modest deposit, progress payments tied to defined milestones, and a final payment held until the work is complete and any inspection has passed. Many states cap residential deposits by statute.
A demand for half the money up front, or for payment in cash, or for a check made out to an individual rather than the business, is a warning that the company is funding your job with your money and possibly funding someone else's job with it too. That is how homeowners end up with a half-finished project and an unreachable phone number.
Read the contract for six specific things
- Scope in detail. Materials by brand and model, quantities, and what is explicitly excluded. "Install new windows" is not a scope.
- Start and completion dates. Even approximate ones create accountability.
- Change order process. Every change should be priced and signed before the work happens. This single clause prevents most billing disputes.
- Who pulls the permit. It should be the contractor. When a homeowner pulls the permit, the homeowner becomes responsible for code compliance.
- Lien waivers. Ask for a signed waiver from the contractor and from any major supplier or subcontractor with each payment. Without them, a supplier who was not paid can file a mechanics lien against your house even though you paid your contractor in full.
- Warranty terms in writing. Length, what is covered, and whether it transfers if you sell.
Know your cancellation rights
Under the Federal Trade Commission's Cooler-Off Rule, a contract signed in your home for more than twenty-five dollars generally carries a three business day right to cancel, and the seller is required to tell you so and provide the form. Many states add their own protections. A contractor who pressures you to start demolition before that window closes is doing it for a reason.
Two quiet signals worth noticing
First, does the estimator measure? A quote produced without measurements is a quote that will change. Second, does the company answer the phone during the sales process? That is the best behavior you will ever see from them. If it is already difficult to get a call back before they have your deposit, it will not improve afterward.
If something does go wrong
Keep everything in writing, take dated photos as work progresses, and pay by credit card or check rather than cash so you have a record. If a dispute cannot be resolved directly, your state licensing board and state attorney general's consumer protection office both accept complaints, and many states operate a recovery fund for homeowners harmed by licensed contractors.
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