10 Questions to Ask Before Hiring a Contractor (And What the Answers Tell You)

The difference between a renovation that goes smoothly and one that turns into a nightmare usually comes down to what happens before the work starts. Specifically, the questions you ask during that first conversation with a contractor.

Most homeowners feel awkward asking pointed questions. It feels confrontational, or they worry about offending someone. But every experienced contractor expects these questions. The ones who get annoyed by them are usually the ones you want to avoid.

Here are ten questions that separate a thorough vetting process from a hopeful guess. For each one, we'll cover why it matters, what a good answer sounds like, and what should raise a red flag.

1. What is your contractor license number, and can I verify it?

Ask for the license number before anything else and look it up yourself on your state's licensing board website. A legitimate contractor gives it without hesitation. Every state maintains a free public database where you can confirm the license is active, check its classification, and see any disciplinary history — the whole process takes under two minutes.

This is the single most important question, and it should be the first one you ask. A contractor license number lets you independently verify that the person standing in your living room is legally authorized to do the work they're proposing.

What a good answer looks like:They give you the number immediately, without hesitation. Some contractors carry their license card or have it printed on their business card. Many will also tell you how to look it up on your state's licensing board website.

What a bad answer looks like:"I'm in the process of getting it," "My partner holds the license," or "You don't really need one for this type of work." Any deflection here is a hard stop. Most states require contractors to be licensed for work above a certain dollar amount, and every state has a public database where you can verify active licenses. If they can't produce a number, move on.

2. Can you provide a certificate of insurance for both liability and workers' comp?

Require a Certificate of Insurance (COI) showing active general liability coverage and workers' compensation before signing anything. General liability covers damage to your property; workers' comp covers injuries to their crew on your property. Without both, you could be personally liable for accidents that happen during your project.

A license tells you they're authorized to work. Insurance tells you what happens when something goes wrong. You need to see proof of both general liability insurance and workers' compensation coverage. General liability covers damage to your property. Workers' comp covers injuries to their crew while on your property.

What a good answer looks like: They offer to have their insurance company send you a certificate of insurance (COI) directly. This is standard practice and takes about a day. A legitimate COI will show the policy number, coverage amounts, effective dates, and name you as the certificate holder.

What a bad answer looks like:"I'm insured" with no willingness to provide documentation. Or they hand you a photocopy that you can't verify. Without valid insurance, you're personally liable if a worker falls off a ladder on your property. That's a risk no homeowner should take.

3. Who is responsible for pulling the permits?

The contractor should pull all required permits — not you. In most jurisdictions, whoever pulls the permit is legally responsible for the work meeting code. A contractor who suggests you pull permits yourself, or who says permits aren't needed, is either cutting corners or doesn't understand local requirements. Both outcomes put you at risk.

Building permits exist to ensure work meets local safety codes. The question of who pulls them matters more than most people realize. In most jurisdictions, the person who pulls the permit is legally responsible for the work meeting code. That should be the contractor, not you.

What a good answer looks like:"We handle all the permits. It's included in the project cost." A good contractor knows exactly which permits are needed for your project and factors the cost and timeline into their bid. They should also be able to tell you roughly how long the permitting process takes in your area.

What a bad answer looks like:"We don't really need permits for this," or "You can pull the permit yourself to save money." If a contractor suggests skipping permits, that's a major red flag. Unpermitted work can lead to fines, forced demolition of completed work, and serious problems when you try to sell your home.

4. What does the payment schedule look like?

A legitimate contractor structures payments around completed milestones — a modest deposit upfront (typically 10%), progress payments tied to specific phases, and a final payment only after a walk-through. Be wary of anyone requesting 50% or more upfront. In California, the maximum deposit is legally capped at $1,000 or 10% of the contract, whichever is less.

How and when you pay is one of the strongest signals of whether a contractor runs a legitimate business. There is an industry-standard pattern that protects both parties: a modest deposit up front, progress payments tied to completed milestones, and a final payment after a walk-through.

What a good answer looks like: A clear breakdown tied to project phases. For example: 10% deposit at signing, 25% when demolition and framing are complete, 25% after rough-in inspections pass, 25% when finishes are installed, and 15% upon final walk-through. The specific percentages vary, but the structure should tie payments to visible progress.

What a bad answer looks like:Asking for 50% or more up front. Requesting the full amount before work begins. Cash-only arrangements with no receipts. These are some of the most common patterns in contractor fraud. Many states actually cap the maximum deposit a contractor can legally collect. In California, for example, it's $1,000 or 10% of the contract price, whichever is less.

5. What is the realistic timeline for this project?

A trustworthy contractor gives you a range, not a single date, and proactively names the variables that could cause delays: permit approval times, material lead times, inspection scheduling. A kitchen remodel that a contractor claims will finish in three weeks with no caveats is almost certainly an underestimate designed to win the bid.

Every project takes longer than you think. The question isn't whether there will be delays, but whether your contractor is honest about what to expect. A realistic timeline discussion reveals how much experience a contractor has with projects like yours.

What a good answer looks like:They give you a range rather than a single date. They mention factors that could cause delays: permit approval times, inspection scheduling, material lead times, or weather for exterior work. They explain what the critical path is and which phases depend on each other. A contractor who says "eight to ten weeks, assuming permits come through in two weeks and the custom cabinets ship on time" is being straight with you.

What a bad answer looks like:An aggressively short timeline with no caveats. "We'll have it done in three weeks" for a kitchen remodel is either delusional or dishonest. Also watch for vague answers like "it depends" with no further detail. That usually means they haven't thought through the scope of your project.

6. Will you be using subcontractors, and are they licensed?

Using subcontractors for electrical, plumbing, and HVAC is normal and expected. What matters is whether those subs are also licensed and insured, and whether the general contractor takes full responsibility for their work. Ask for the subcontractors' license numbers so you can verify them independently — a reputable GC will have no problem sharing these.

Most general contractors use subcontractors for specialized trades like electrical, plumbing, and HVAC. That's normal and expected. What matters is transparency about who will actually be in your home and whether those subcontractors are also properly licensed and insured.

What a good answer looks like:"Yes, we use our own electrician and plumber. They're licensed, insured, and we've worked with them for years. I'm responsible for managing them and their work quality." They should be willing to share the subcontractors' license numbers so you can verify them independently.

What a bad answer looks like:"I'll bring in some guys as needed" with no specifics about who they are or whether they're licensed. The worst-case scenario is a contractor who subs out your entire project to an unlicensed crew and just collects a management fee. You end up paying licensed contractor prices for unlicensed work.

7. What warranty do you offer on your workmanship?

Expect a written workmanship warranty of at least one year from any reputable contractor. Established firms commonly offer two to five years. The warranty should be in the contract and clearly distinguish the contractor's workmanship guarantee from manufacturer warranties on materials like windows or roofing. A verbal "we stand behind our work" is not enforceable.

A warranty tells you how confident a contractor is in the quality of their work. It also gives you a clear path to resolution if defects show up after the project is done. Most reputable contractors offer a workmanship warranty separate from any manufacturer warranties on materials.

What a good answer looks like:A written warranty of at least one year on workmanship, with clear terms about what's covered and how to make a claim. Two to five years is common among established contractors. They should explain the difference between their workmanship warranty and manufacturer warranties on products like windows, roofing materials, or appliances.

What a bad answer looks like:"We stand behind our work" with nothing in writing. Verbal warranties are nearly impossible to enforce. If a contractor won't put their warranty in writing, it effectively doesn't exist. Also be cautious of warranties with so many exclusions that they're functionally meaningless.

8. Will you provide a detailed written contract before work begins?

Every project needs a written contract — regardless of size — that specifies the exact scope of work, materials, payment schedule, start and completion dates, permit responsibilities, and dispute resolution terms. Most states legally require written contracts above certain dollar thresholds, but you should insist on one even for smaller jobs. A one-page estimate with a dollar amount is not a contract.

A handshake deal might feel friendly, but it leaves you with zero protection. A written contract is the single document that defines what you're getting, when you're getting it, and how much you're paying. Every state requires written contracts for projects above a certain dollar amount, but you should insist on one regardless of project size.

What a good answer looks like: They present a detailed contract that includes a full scope of work with specific materials and brands, a payment schedule, start and completion dates, change order procedures, permit responsibilities, cleanup expectations, and dispute resolution terms. The contract should be clear enough that a neutral third party could read it and understand exactly what was agreed upon.

What a bad answer looks like:A one-page estimate that says something like "kitchen renovation - $45,000." No scope detail, no timeline, no terms. Or a contractor who resists putting things in writing and prefers to "work things out as we go." Without specifics in the contract, you have no grounds to dispute anything later.

9. Can you provide references from projects completed in the past year?

Ask for three to five references from recent projects similar in scope to yours, and actually call them. A reference from five years ago tells you little about the contractor's current crew and business practices. When you reach out, ask specifically whether the project finished on time and on budget, how the contractor handled problems, and whether they would hire them again.

References let you hear directly from people who have been in your exact position. The key word here is "recent." A reference from five years ago tells you very little about the contractor's current crew, business practices, or reliability.

What a good answer looks like: They provide three to five references from the past 12 months, ideally for projects similar in scope to yours. Better yet, they offer to show you a recently completed project in person. When you contact references, ask specific questions: Did the project finish on time and on budget? How did the contractor handle problems? Were they easy to communicate with? Would you hire them again?

What a bad answer looks like:"Check our reviews online" without providing direct references. Online reviews have value, but they can be manipulated. A contractor who can't connect you with a single past client either doesn't have satisfied customers or hasn't been in business long enough to have a track record.

10. What is your process when something goes wrong?

This question reveals more about a contractor than almost any other. Every experienced contractor has dealt with problems on a job — the ones worth hiring have a clear, practiced process for resolving them. Vague reassurances like "that won't happen" or claims of a perfect track record are signs of inexperience or dishonesty, not reliability.

This might feel like an uncomfortable question, but it is arguably the most revealing one on this list. How a contractor answers it tells you everything about how they handle conflict, take responsibility, and manage problems that are inevitable on any construction project.

What a good answer looks like:They have a clear process. Something like: "If you notice a problem, contact me directly. We'll come out within 48 hours to assess it. If it's a workmanship issue, we fix it at no charge under our warranty. If there's a disagreement about scope, we refer back to the contract and work it out. We also include a mediation clause in our contracts in case we can't resolve something directly." This shows a contractor who has dealt with problems before and has systems in place.

What a bad answer looks like:"That won't happen" or "We've never had any complaints." Every contractor who has been in business for more than a year has dealt with problems. Claiming otherwise is either dishonest or delusional. You want someone who acknowledges that issues arise and has a mature process for handling them, not someone who pretends problems don't exist.

How should you use these questions effectively?

Don't treat this as a checklist to rush through in one sitting. Ask these questions across your initial conversation, get at least three bids, and ask every contractor the same questions so you have an apples-to-apples comparison. Take notes — after meeting three or four contractors, the details blur quickly. Verify everything independently: license status, insurance, and references.

Finally, verify everything independently. Look up their license on your state's licensing board website. Call their insurance company to confirm the COI is valid. Actually contact the references. The contractors who are telling the truth will have nothing to hide.

What should you do if a contractor fails these questions?

Walk away. Asking these ten questions takes about 15 extra minutes per contractor — a small investment against a project that might cost tens of thousands of dollars. The right contractor will welcome the scrutiny because they know it sets the project up for success. The wrong contractor will dodge, deflect, or rush past the details. Pay attention to which one you're talking to.