Contractor Interview Questions: 15 Scenario Questions and What to Listen For
The short answer: ask candidates to walk you through a specific, messy moment from the seat, then listen for their first move. "Tell me about yourself" and "What's your biggest weakness?" produce rehearsed answers. "It's 3:30, you have two more calls, and the customer says the last company told them it was the compressor. Walk me through your first five minutes" produces a real one. Below are 15 contractor interview questions across five seats, each with what a strong answer and a weak answer sound like.
Most trades interviews last 30 to 45 minutes and cover experience, availability and pay. Those matter. They leave out the one thing that drives most of the cost of a bad hire: what the person reaches for first when the work gets hard.
Questions by seat
The 15 questions below cover five seats in a residential service shop. Each seat also has its own full set of scenario questions, written for that seat and that trade:
- Comfort advisor interview questions for HVAC in-home sales
- HVAC dispatcher interview questions
- HVAC CSR interview questions
- HVAC service manager interview questions
- HVAC technician interview questions
- Plumber interview questions
- Electrician interview questions
- Roofer interview questions
- Garage door technician interview questions
- Pest control technician interview questions
- Mechanical estimator interview questions for commercial mechanical contractors
- Janitorial interview questions for commercial cleaning crews
- Questions to ask when hiring cleaners for residential cleaning companies
Why most interview questions don't work
Standard questions have three problems in a trades shop.
They are rehearsed. Any candidate who has interviewed twice has a polished answer to "Why do you want to work here?"
They reward talkers. A technician who describes a perfect diagnostic process in your office may price before diagnosing in a customer's driveway.
They are different for every candidate. When the interview wanders, you end up comparing one candidate's best story with another's worst, and your decision rides on which conversation went better.
How to build a better question
Every question below follows the same pattern:
- A specific moment from the seat, with a time of day and a constraint.
- Two reasonable moves. Nothing obviously right or wrong.
- "Walk me through it," so the candidate has to sequence what they would do first.
Then you listen for the first thing they do. Ask every candidate for the seat the same questions in the same order, and write down what they said before you talk about it with anyone.
Service technician
1. "It's 3:30, you have two more calls, and the customer says the last company told them it was the compressor. Walk me through your first five minutes." Strong: names a reading or check before any opinion. Weak: agrees or argues with the last company before any instrument comes out.
2. "You've found the problem. The repair is $900 and the customer says, 'That's crazy, I just want it running tonight.' What do you say?" Strong: asks what matters most tonight and lays out options. Weak: drops the price or repeats the diagnosis louder.
3. "You're on a call and notice something unrelated that's going to fail this season. The customer is in a hurry. What do you do?" Strong: tells the customer briefly, writes it on the ticket, offers to quote it. Weak: says nothing to save time, or pushes hard on something the customer did not call about.
CSR and call taker
4. "A caller's first words are, 'How much do you charge to come out?' What do you say?" Strong: a question back about the problem before any number. Weak: recites the fee and waits.
5. "It's 3:00 on a 97-degree day. The board is full. A caller says their elderly mother is in the house with no air. What do you do?" Strong: checks with dispatch before promising, offers the real options, stays with the caller. Weak: promises today without checking, or reads the policy and ends the call.
6. "A repeat customer insists on the same tech as last time. That tech is booked for three days." Strong: offers the real choices and lets the customer decide. Weak: promises the tech will squeeze them in.
Dispatcher
7. "A customer calls at 1:45 asking where the tech is. Their window was 12 to 2. What do you do before you answer?" Strong: checks the truck's location and status, then gives a real time. Weak: apologizes and guesses, or disappears to investigate for five minutes.
8. "Your tech calls from a job that has turned into a three-hour repair. They had two more calls this afternoon. Walk me through the next fifteen minutes." Strong: finds who frees up first, moves the calls, phones both customers. Weak: hands the problem to the service manager.
9. "While you're rebuilding the board, the tech asks if they'll get overtime for staying late. What do you say?" Strong: sends the overtime question to the manager right away and keeps the board moving. Weak: approves it.
Comfort advisor
10. "You've presented three options. The homeowner goes quiet and looks at their spouse. What do you do in the next thirty seconds?" Strong: asks what they are weighing, then waits. Weak: fills the silence with features or a discount.
11. "The homeowner says, 'Just price the same size. The old one worked fine for twenty years.'" Strong: a specific, polite reason to see the house and run the load calculation first. Weak: prices off the nameplate.
12. "'Install Thursday and match the other quote, and I'll sign now.' Your install calendar is full until next week." Strong: honest about what they can commit, gets an answer from the calendar or price owner before promising. Weak: promises Thursday.
Service manager or field supervisor
13. "One tech has had four callbacks this month. You liked working with them. What do you do this week?" Strong: reviews the tickets first, talks to the tech directly, changes what caused it. Weak: "I'd ride with them and fix it."
14. "Two techs are arguing about the on-call rotation, and one says they'll quit over it. What do you do?" Strong: hears both, decides on a stated rule, and applies it to everyone. Weak: gives the louder tech what they want.
15. "The owner asks you to waive a diagnostic fee for a friend's neighbor. Your techs are paid partly on those fees. What do you do?" Strong: raises the cost to the techs plainly, then carries out the owner's decision and tells the tech why. Weak: waives it quietly and says nothing to the tech.
How to score answers consistently
Use a simple three-point scale for each question: 1 for a weak first move, 2 for mixed, 3 for strong. Write a one-line note on what the candidate actually said. Score before discussing with anybody else in the room.
Two cautions. Keep the questions tied to the work of the seat, and ask every candidate for the seat the same ones. And stay away from questions about age, family plans, health, religion, national origin or anything else unrelated to the job. If you are unsure whether a question is allowed where you operate, check with an employment attorney.
Where the questions come from in a First Move Assessment report
Generic question lists get you most of the way. The better questions are aimed at this particular candidate's weak spots.
A First Move Assessment report does that for you. After the candidate finishes a 10 to 20 minute assessment for the seat you choose, the report shows where they line up with the seat and where they pull away, question by question. For each place they pull away, it gives you interview questions and what a good answer sounds like. You walk into the interview knowing which part of the person to push on.
Each trade has its own seat list, written in that trade's words: HVAC, plumbing, electrical, roofing, garage door, pest control, commercial mechanical, residential cleaning and commercial cleaning.
Frequently asked questions
What are good interview questions for a contractor to ask?
Scenario questions built on a real moment from the seat, with a time of day, a constraint and two reasonable moves: a busy afternoon and a customer repeating another company's diagnosis, a caller who wants a price before describing the problem, a tech whose job just turned into a three-hour repair. Listen for what the candidate does first. For technicians, see our HVAC technician interview questions.
How many questions should a trades interview include?
Six to eight scenario questions plus your standard checks on licenses, availability and pay will fit in 45 minutes. Ask every candidate for the seat the same ones.
Should I use behavioral or situational interview questions?
Both work. Behavioral questions ask about a past event and can be rehearsed. Situational questions describe a specific moment from your seat and are harder to prepare for. For trades seats, situational questions built on real moments tend to show more.
What interview questions should I avoid?
Anything about age, family plans, pregnancy, health or disability, religion, national origin, or other protected characteristics. Keep every question tied to the work of the seat.
What does the AI do?
Nothing. No AI is used when your candidate takes the assessment or when the report is made. Their answers are scored by a fixed formula. Every number that formula uses was set in advance and approved before use, and nothing in it is learned or adjusted by a computer from anybody's answers. Every written section of the report is a fixed template filled in from the numbers the formula produced. The same answers give the same result every time, and no candidate information is sent to any AI provider.
Why we left AI out. First, you can check it: every number in the report comes from arithmetic that returns the same answer every time it runs, and an AI model can give two different answers to the same question. Second, it does not drift: an AI model can be changed by its maker without notice, which would quietly change what your reports say, while this formula changes only when we publish a new version, and every report records the version that scored it. Third, your candidate's answers stay with us and are never handed to an AI company. Fourth, the law treats AI in hiring as a special case, and most of the cost of that lands on the employer who uses it.
What the law says. These are the main rules in force or already passed as of September 2026. It is general information, not legal advice.
New York City, Local Law 144 of 2021 (NYC Administrative Code section 20-870 and following; rules at 6 RCNY section 5-300). An employer may not use an automated employment decision tool unless it has had an independent bias audit within the past year, a summary of that audit is published, and candidates are given notice at least 10 business days before it is used. The rules cover tools built with machine learning, statistical modeling, data analytics or AI in which a computer at least in part picks the inputs or how much each one counts, in order to make the result more accurate.
Illinois, Human Rights Act as amended by Public Act 103-0804 (775 ILCS 5/2-102, in force since January 1, 2026). An employer must tell applicants and employees when it uses artificial intelligence in hiring and other employment decisions, may not use AI in a way that discriminates against a protected class, and may not use ZIP codes as a stand-in for one.
California, Civil Rights Council regulations on automated-decision systems (California Code of Regulations, title 2, in force since October 1, 2025). These cover any computational process that makes or helps make an employment decision, including one built on algorithms or statistics rather than AI. A tool that screens people out on a protected characteristic can be unlawful whatever it is built on, and employers must keep the related records for four years.
Colorado, Senate Bill 26-189 (in force from January 1, 2027, replacing the state's 2024 AI Act). It covers automated decision-making technology, meaning any technology that uses computation on personal data to produce scores or other output used in a decision about a person, with or without AI. Employers must give notice at the point of use, explain the tool's role within 30 days of an adverse decision, and offer human review and reconsideration on request.
Federal law. Title VII of the Civil Rights Act, the Americans with Disabilities Act and the Age Discrimination in Employment Act apply to every selection procedure, AI or not, and the Uniform Guidelines on Employee Selection Procedures (29 CFR Part 1607) set out how adverse impact is judged.
What that means for you. Leaving AI out keeps this tool clear of the parts of these laws written around AI and machine learning. It does not take it outside all of them. California and Colorado define the tools they cover by computation rather than by AI, so a fixed formula like this one can still fall within them, and federal law applies to every assessment. What applies to you depends on where you hire and how you use the report. Section 7 of the legal terms and disclaimers sets out your responsibilities, and your own employment lawyer should confirm what applies where you hire.
Get the questions written for your candidate
Each sample report ends with interview questions and listening cues for that candidate's weak spots. Read the dispatcher one first. Get the three sample reports.