Most “questions to ask a general contractor” lists are just lists of questions. They don’t tell you what a good answer sounds like or what a bad answer reveals. The questions are easy; the listening is what matters.
This guide walks through the questions that actually matter when vetting a general contractor for a project in California, with practitioner-level guidance on what to listen for in each answer. Written from the contractor side of these interviews, after years of being on the receiving end. The list is structured by project tier (small remodel through custom home build) because the depth of vetting scales with project size and risk.
The foundational questions every homeowner should ask
These four apply to every project regardless of scope.
What’s your California Contractors State License Board (CSLB) license number?
What you’re asking: Proof of legitimate licensing.
What a good answer sounds like: A specific license number, the classification (B for General Building Contractor, B-2 for Residential Remodeling, etc.), the entity name the license is held under, and an invitation to verify it on the CSLB website.
What’s a red flag: Hesitation, evasiveness, “I’ll send it later,” license held under a different name than the contracting entity, suspended or expired status when you check, license classification that doesn’t match the work.
How to verify: Look up the license at cslb.ca.gov. Verify status (active, not suspended), classification, bonding status, and complaint history. Verify the license name matches the entity on the proposed contract.
Are you bonded and insured?
What you’re asking: Protection for you if something goes wrong.
What a good answer sounds like: Specific bond information (California minimum is $25,000 contractor’s license bond), specific insurance carrier and policy limits (typical good coverage: $2 million general liability, $1 million workers’ compensation), proactive offer to provide certificates of insurance naming you as additional insured on the project.
What’s a red flag: Vague answers, low coverage limits, reluctance to provide certificates, lack of workers’ compensation specifically, suggestion that subcontractors carry their own coverage as a substitute.
Why workers’ comp specifically matters: If a worker is injured on your property and the contractor doesn’t carry workers’ compensation, you can be held liable. This is the most common gap in residential contractor insurance and the most expensive to discover after the fact.
How long have you been operating under this license?
What you’re asking: Real continuity versus name changes and reincarnations.
What a good answer sounds like: A specific number of years, prior business history if applicable (employment with another contractor, prior business under a different name), explanation of business structure changes if any.
What’s a red flag: Newer business with rotating principals, history of CSLB complaints under previous entity names, recently formed LLC with limited operating history claiming long industry experience.
Can I see proof of insurance specifically for my project?
What you’re asking: Project-specific coverage verification.
What a good answer sounds like: Willingness to provide a certificate of insurance naming you as additional insured for the specific project address, prior to any work beginning. Standard practice in legitimate contracting.
What’s a red flag: Reluctance, evasion, suggestion that their general business insurance covers all projects without project-specific documentation, attempt to start work before paperwork is in order.
Experience and fit questions
How many projects of similar scope have you completed in the last two years?
What you’re asking: Current, relevant experience.
What a good answer sounds like: A specific number, references to specific addresses or neighborhoods if appropriate, willingness to walk through what made each project similar or different to yours.
What’s a red flag: Vague answers like “many” or “lots,” inability to recall recent projects, examples that are older than three years (the trade and material market changes fast), examples that aren’t actually similar in scope or budget.
Can I see in-progress and completed projects similar to mine?
What you’re asking: Real, visitable evidence.
What a good answer sounds like: Offer to walk through completed work and visit an in-progress site (with the current client’s permission). Photos and floor plans are useful but in-person visits show finish quality and site management that photos hide.
What’s a red flag: Only photos, photos that look generic or stock, completed projects that are old, reluctance to facilitate site visits, no projects currently in progress (potentially indicating slow business).
Can I speak with three recent past clients whose projects match mine in scope?
What you’re asking: References that actually apply to your decision.
What a good answer sounds like: A list with names, phone numbers, brief project descriptions, and dates. Ideally including one project in progress, one recently completed, and one finished 6–12 months ago (so you can see how the contractor handles warranty issues).
What’s a red flag: Hesitation, only the most recent or most flattering clients, no project-similar references, willingness to provide only a handful of names from years ago.
Questions to ask the references: Was the project completed within budget? Within schedule? How were change orders handled? Were any issues, and how were they resolved? Did the contractor provide lien waivers and warranty documentation at closeout? Would you hire them again?
Have you worked in my jurisdiction, HOA, or coastal zone before?
What you’re asking: Local regulatory familiarity.
What a good answer sounds like: Specific recent projects in your jurisdiction, familiarity with the local building department’s plan-check process and typical timelines, knowledge of HOA approval requirements if applicable, specific experience with Coastal Commission CDP review if in the coastal zone.
What’s a red flag: No local experience, unfamiliarity with the specific jurisdiction’s processes, vague generalizations about California permitting without specific local knowledge.
Why this matters in coastal North County: Coastal Commission CDP review adds 60–120 days to schedules for envelope expansions. HOA Art Jury review in Covenant communities runs 30–90 days. Title 24 Climate Zone 7 has specific energy code requirements. A contractor without local experience will discover these constraints on your project rather than planning for them.
Team and management questions
Who specifically will be running my project day-to-day?
What you’re asking: Real assignment versus sales pitch.
What a good answer sounds like: A specific name, that person’s role and tenure with the company, a description of their experience with similar projects, an offer to meet them before contract signing.
What’s a red flag: Vague references to “our team,” promises that the owner will personally manage when the company has many concurrent projects, inability to identify the actual day-to-day project manager.
Are your key trades in-house employees or subcontractors?
What you’re asking: Quality control structure.
What a good answer sounds like: Clear identification of which trades are in-house versus subcontracted, explanation of how subcontractor selection and management works, willingness to share subcontractor names and license numbers for verification.
What’s a red flag: Inability to specify which trades are in-house, evasion about subcontractor selection process, refusal to share subcontractor information, reliance on subcontractors hired through online platforms.
The honest practitioner take: There’s nothing wrong with subcontractor relationships when they’re stable, vetted, and managed. Most quality residential GCs use a mix of in-house carpenters and supervisors plus established subcontractor relationships for specialty trades (HVAC, plumbing, electrical, tile, etc.). The red flag is rotating subs, not the use of subs.
How do you typically communicate with clients during a project?
What you’re asking: Communication structure and accessibility.
What a good answer sounds like: Specific frequency and format (weekly on-site meetings, daily progress photos, project management software with task tracking, etc.), named point of contact, typical response time for questions.
What’s a red flag: Vague answers, “we’ll figure it out as we go,” reliance on text messages without structured project documentation, no named point of contact.
Process and contract questions
Will you pull all permits?
What you’re asking: Legal accountability for code compliance.
What a good answer sounds like: Yes, with a specific explanation of which permits will be required and approximate timelines for each. The contractor’s name should be on the permits they pull, which makes them legally responsible for code compliance.
What’s a red flag: Suggestion that you pull permits as the homeowner, suggestion that work doesn’t need permits when it does, evasion about the permit process. Homeowner-pulled permits are sometimes appropriate (very minor work) but more often a signal that the contractor wants to avoid being on the permit record.
Why this matters: Permits provide legal protection. Work without permits creates problems at sale (lender won’t lend on unpermitted square footage), at insurance claim time (claims can be denied for damage to unpermitted work), and at HOA inspection. Contractors who try to work without permits when permits are required create liability for the homeowner.
How are payments structured?
What you’re asking: Risk management for both parties.
What a good answer sounds like: Progress payments tied to specific construction milestones (foundation complete, framing complete, drywall complete, etc.) rather than calendar dates. Modest deposit (10–20% of project value, possibly more for material orders), with retainage held until completion.
What’s a red flag: Large upfront payment (more than 25–30% of project value), payment schedule tied to calendar dates rather than milestones, suggestion that the final payment can be paid before substantial completion, request for cash payment or payment to an individual rather than the business entity.
The California legal context: California law prohibits residential construction contracts from requiring downpayments greater than 10% of the contract price or $1,000, whichever is less. This applies to remodels under $500. Contracts above that have different rules, but the principle of milestone-tied payments holds.
How do you handle change orders?
What you’re asking: Process for inevitable mid-project changes.
What a good answer sounds like: Written change orders signed by both parties before work proceeds, specific pricing for each change, schedule impact noted on each change, ability to track cumulative change-order spending against project contingency.
What’s a red flag: Vague answers, suggestion that small changes can happen “on the handshake,” verbal agreements about scope adjustments, lack of process for change-order documentation, change-order pricing presented after work is already done.
What’s your warranty policy?
What you’re asking: Long-term accountability.
What a good answer sounds like: Specific warranty terms, typically 1-year general workmanship warranty as minimum, 2-year systems warranty (electrical, plumbing, HVAC) for new construction, 10-year structural warranty for new home builds (California requirement on certain projects). Clear explanation of what’s covered and what isn’t.
What’s a red flag: Vague warranty terms, “we stand behind our work” without specifics, no documentation of warranty terms, and reluctance to provide warranty documentation in writing.
Do you provide lien waivers at completion?
What you’re asking: Protection from subcontractor liens.
What a good answer sounds like: Yes, conditional lien waivers at each progress payment and unconditional final lien waivers at project completion, from the contractor and from all subcontractors.
What’s a red flag: Unfamiliarity with the concept, suggestion that lien waivers aren’t necessary, reluctance to provide lien waivers from subcontractors.
Why this matters: Under California mechanic’s lien law, subcontractors who aren’t paid by your general contractor can place a lien on your property even if you’ve paid the GC in full. Lien waivers protect you from this risk by documenting that subs have been paid.
Project-specific questions
What’s the biggest risk factor for a project like mine?
What you’re asking: Practitioner judgment about your specific situation.
What a good answer sounds like: Specific factors based on your project (slab foundation concealed conditions, Coastal Commission timeline risk, material lead times on specific selections, etc.). A genuine assessment shows the contractor has thought through the project and isn’t just selling.
What’s a red flag: Reflexive reassurance that there’s nothing to worry about, generic answers that don’t reference specifics of your project, inability to identify any risk factors.
What’s your typical timeline for a project like this?
What you’re asking: Realistic schedule expectation.
What a good answer sounds like: A specific range with reasons (permit review duration, material lead times, construction phases), acknowledgment of factors that could extend it, comparison to recent similar projects.
What’s a red flag: Aggressive timelines that match what you said you want without explanation of how they’re achievable, vague answers, claims of dramatically faster delivery than typical industry norms.
What contingency do you recommend?
What you’re asking: Honest assessment of unknowns.
What a good answer sounds like: A specific percentage range with reasons (older home with more unknowns, complex site, scope with known risk factors, etc.). Typical recommendations: 10–15 percent for newer homes with straightforward scope, 15–20 percent for medium complexity, 20–25 percent for high complexity. For custom homes, 15–20 percent on hard construction cost.
What’s a red flag: Suggestion that contingency isn’t necessary, very low contingency recommendations (5 percent or less on significant scope), inability to articulate what contingency would cover.
The judgment-revealing questions
These questions reveal whether the contractor is actually thinking about your project or just selling you.
What questions should I be asking that I haven’t?
What you’re asking: Whether they’re thinking with you or selling to you.
What a good answer sounds like: Specific suggestions based on your project (have you thought about temporary housing during the build, have you considered the implications of starting before winter rain season, what’s your plan if X material has a lead time of Y weeks). This is the question that often reveals whether the contractor is a good fit because the answer demonstrates whether they’re thinking like a partner or like a vendor.
What’s a red flag: Generic answers, deflection to standard talking points, attempts to use the question as another sales opportunity.
Tell me about a project that didn’t go well.
What you’re asking: Honesty about real practice.
What a good answer sounds like: A specific situation, what went wrong, how it was addressed, what they learned. Every contractor has had problems. The willingness to talk about them honestly signals maturity.
What’s a red flag: Claims that no project has ever had problems, reflexive deflection to blaming clients or trades, refusal to engage with the question.
What would cause you to walk away from this project?
What you’re asking: Whether they have judgment about fit.
What a good answer sounds like: Specific scenarios where they’d decline a project (homeowner with unrealistic budget expectations, project requiring scope they don’t typically handle, site conditions that don’t fit their capabilities, etc.). Good contractors decline projects regularly because the wrong fit benefits neither party.
What’s a red flag: Claims that they’d take any project, inability to articulate what wouldn’t work for them, eagerness to take a project that’s outside their normal scope.
Questions a good contractor will ask YOU
The interview goes both ways. A good contractor asks specific questions during the bid process. The absence of contractor questions is itself a red flag.
Listen for these from the contractor side:
- What are you trying to accomplish with this project, beyond the scope on paper?
- What’s driving the timeline? Are there external dates that matter?
- Have you worked with a contractor before? What worked and what didn’t?
- What’s your budget, and how much contingency are you holding?
- How will you make decisions during the project, and how quickly?
- Will you be available during construction? Are there family events or travel planned during the project window?
- What concerns do you have going into this project?
A contractor who doesn’t ask any of these is either not thinking carefully about fit or is treating you as transactional. Either way it’s a signal about how the project will go.
How vetting depth should scale with project size
Small remodels (under $50K): The foundational four questions plus basic team and process questions. Two references minimum. License and insurance verification. Written contract with milestone payments. Most homeowners can vet small projects in 1–2 conversations.
Mid-sized projects ($50K–$300K): All foundational questions plus full experience-fit and process sections. Three references with similar scope, ideally one in progress. Site visits to current and completed projects. CSLB complaint history check. Written contract with detailed allowances and change-order process. Typically 2–3 conversations and one or two contractor visits.
Large projects and custom homes ($300K+): Full question set including judgment-revealing questions. Five or more references including past clients whose projects finished 6–12 months ago. Multiple in-person meetings. Verification of bond capacity for the project size. Architect or designer’s perspective on the contractor’s collaboration ability. Often a written interview process. Typically 4–6 conversations and multiple site visits.
Frequently asked questions
What’s the most important question to ask a contractor?
CSLB license number, followed by proof of insurance and bonding. These are foundational. Without them, no other answer matters.
How many contractors should I interview?
Three is typical for mid-sized projects. For larger projects, four to five. The goal isn’t finding the cheapest bid; it’s finding the contractor whose process, team, and approach fit your project best.
Should I always go with the lowest bid?
No. The lowest bid is often missing scope, has aggressive assumptions about contingency, or comes from a contractor who will make up the difference through change orders. Compare bids by what’s included, not by bottom-line price.
What if a contractor refuses to answer some of these questions?
That’s a strong signal about how they handle accountability. Move on. There are plenty of contractors who will answer these questions willingly.
How do I verify a contractor’s CSLB license?
Search at cslb.ca.gov. Look up by license number or business name. Verify active status, current bond, classification matching the work scope, and complaint history. Verify the license matches the entity that will sign your contract.
What’s a reasonable deposit for a residential project?
Under California law, residential contracts can require no more than 10 percent of the contract price or $1,000, whichever is less, as a deposit. For larger projects above the contract threshold, milestone-tied payment schedules are standard.
Should I get everything in writing?
Yes. License numbers, insurance certificates, scope, schedule, payment terms, allowances, change orders, warranty terms. Anything not in writing doesn’t exist in the contract. Verbal agreements at site walks create disputes later.
How do I know if a contractor is being honest about timeline?
Compare their proposed timeline to recent similar projects they’ve completed. Ask references about whether the timeline matched the contract. Aggressive timelines that match what you said you wanted are a signal to look more carefully.
For broader context on hiring for specific project types, see our home renovation checklist, or for custom home and major remodel projects, see our custom home builder and home remodeling service pages.