19 Questions to Ask a Contractor Before You Hire

The right questions surface the wrong contractor before they ever touch your home. A confident pro has answered all of these dozens of times and won't flinch. A bad hire gets vague, gets irritated, or changes the subject — and that reaction is exactly the information you're paying for. The goal of an interview isn't to trip anyone up; it's to see how they think about credentials, crews, timelines, and money.

Work these into your conversations with the three contractors you're quoting — asking the same questions of each also makes the bids far easier to compare. Below are 19, grouped by what they reveal.

Before the questions: find pros and get three quotes

Line up your interviews with contractors who actually do your type of work — ideally from neighbor referrals, local supply houses, or vetted directories. Get at least three written quotes on the identical scope; prices for the same job commonly vary 20–40%, and three bids give you both a market rate and negotiating leverage. See Why You Should Always Get 3 Quotes for the full case. Asking every contractor the same questions turns three conversations into a real comparison.

A quick word on how to ask. You're not interrogating anyone — you're having a professional conversation, and the goal is to hear how a contractor thinks. A pro welcomes these questions because answering them well is how they win jobs from careful homeowners. So don't rush. Ask, then listen for specifics. "We're fully licensed and insured, here's our number and I'll have my agent send you a certificate" is a real answer. "Don't worry, we've been doing this for years" is a deflection. The difference between those two responses tells you more than the price ever will. Keep a simple notepad or spreadsheet as you go, and score each contractor on the same rows — the pattern almost always makes the right choice obvious.

Questions about licensing, insurance, and legitimacy

1. Are you licensed for this specific work, and what's your license number? Then verify it yourself on your state licensing board website — a free public lookup shows status and any discipline. Don't skip this; the full license and insurance check takes about ten minutes.

2. Do you carry general liability insurance, and can your insurer send me a certificate directly? A certificate straight from the agent — not a photo of a card — is the only real confirmation.

3. Do you carry workers' compensation for your crew? Without it, an injured worker can pursue you. This is non-negotiable for any job involving heights, electrical, or heavy work.

4. Are you bonded? A surety bond gives you a recovery path if the job is abandoned or botched. Get the bond number.

5. Will you pull the required permits in your name? A pro pulls permits and schedules inspections. A contractor who wants you to pull the permit is dodging responsibility for code compliance — a real red flag, and one of the 11 contractor red flags.

Questions about the crew and the work

6. Who actually performs the work — your employees or subcontractors?

7. If you use subs, how are they vetted, licensed, and insured? You want assurance their subs carry their own coverage.

8. Who's my day-to-day point of contact? You need one name and number, not a rotating cast.

9. How many projects will you be running at the same time as mine? A crew stretched across six jobs is why timelines slip.

10. Can I see two or three recent projects like mine, and speak with those homeowners? A pro has references ready. Actually call them — ask about timeline, communication, budget surprises, and whether they'd hire the contractor again.

Questions about timeline and process

11. When can you start, and what's the realistic completion date?

12. What could delay the job, and how do you handle delays? Honest contractors name the usual culprits: weather, permit timing, material lead times, hidden damage.

13. What are the working hours, and how do you protect and clean the site each day?

14. How do you handle changes once we've started? The answer you want: a written, signed change order that prices the change before the work happens. This single practice prevents most billing disputes.

Questions about the estimate, warranty, and payment

15. Will you give me an itemized written estimate and a full contract? The contract should spell out scope, materials and allowances, milestones, change-order terms, and lien waivers. Learn to read it in How to Read a Contractor's Estimate.

16. What warranty do you offer on your labor, and what's covered? Labor warranties commonly run one to several years; understand what voids it.

17. What are the manufacturer warranties on the materials, and are you certified to install them? Some material warranties only hold if a certified installer does the work.

18. What's the deposit, and how is the rest of the payment scheduled? A reasonable deposit is 10–33%; the balance should be tied to milestones with a final payment held until the work passes inspection. Full detail in Contractor Deposits & Payment Schedules. Full payment upfront or a cash-only demand is a walk-away.

19. Will you provide lien waivers as I pay? A lien waiver confirms subs and suppliers were paid for that portion — without it, an unpaid sub can lien your home even after you've paid in full.

Reading the answers: green flags vs. warning signs

The questions above only work if you know what a good answer sounds like. A few patterns to hold onto:

• Specific beats vague. A pro names the permit office, the shingle brand, the crew size, the warranty term. A problem contractor keeps it fuzzy — "we'll handle all that" — because specifics create accountability.
• Willingness to document is the tell. A real pro is happy to put the scope, the price, the timeline, and the payment schedule in writing, and to have their insurer send a certificate. Reluctance to document anything is the single most reliable warning sign.
• Comfort with your other bids. A confident contractor expects you to be getting other quotes and doesn't pressure you to sign on the spot. "This price is only good today" is designed to stop you from comparing — one of the 11 contractor red flags.
• Answers to money questions. How a contractor talks about deposits and payments predicts how the money will actually flow. A reasonable deposit and milestone payments are normal; "half up front, cash preferred" is not.

If two or more answers set off alarms, believe them and move on. There are plenty of good contractors, and the cost of hiring the wrong one dwarfs the inconvenience of a few more interviews.

FAQ

Should I ask these questions before or after getting a quote? Both. Cover licensing and insurance early to avoid wasting time on someone who can't clear the bar, then dig into crew, timeline, and payment as you compare the written bids.

What's the single most revealing question? "Will you pull the permits in your name?" A pro says yes without hesitation. A contractor who pushes it onto you is telling you they'd rather not be accountable to an inspector.

Is it rude to ask for references and insurance certificates? No — it's standard, and any legitimate contractor expects it. Reluctance is itself an answer.

How do I compare answers across three contractors? Keep a simple scorecard with the same rows for each: license verified, insurance certificate received, permit handling, references called, warranty terms, deposit and payment schedule. The pattern usually makes the choice clear.

For the full hiring process these questions fit into — from finding pros to structuring payments — start with How to Hire a Contractor Without Getting Burned.

Cost figures are 2026 national averages for general information only, not quotes. Your price depends on your specific job, home, and location. Always get a written estimate and verify licensing before authorizing work.