A good bathroom contractor answers these 15 questions in writing, without dodging, and the answers match from bid to contract. Ask them about licensing, who actually does the work, payment schedules, change orders, and warranties — and treat evasive answers as the single most reliable red flag in remodeling.
Hiring a bathroom contractor is not like hiring a plumber for a one-hour fix. You’re inviting someone into your home for weeks, handing over thousands of dollars, and trusting them with the two most failure-prone systems in a house: water and electricity. The difference between a great experience and a nightmare usually isn’t the contractor’s tile portfolio — it’s what you nailed down before anyone picked up a hammer.
Key takeaways
– Get at least three itemized bids and compare line by line — not just the bottom number.
– Verify license and insurance yourself; a contractor’s word isn’t verification.
– Never pay more than a small deposit upfront, and tie every payment to a completed milestone.
– Get the warranty, the change-order process, and the cleanup expectations in the contract — verbal promises evaporate.
– The cheapest bid that skips these questions usually becomes the most expensive project.
Why the Questions Matter More Than the Quote
Two contractors can quote the same bathroom $11,000 and $19,000, and both numbers can be “honest.” One bid includes the tile, the waterproofing system, and the permit; the other assumes you’ll supply the tile, skips the permit, and leaves the rotted subfloor as a change order waiting to happen. Our guide to why bathroom remodel quotes vary digs into exactly how this happens.
Questions force every bidder to describe the same job in the same terms — the only way to compare bids apples-to-apples. They also reveal character: a pro who’s done this a hundred times will answer fast and in writing; someone planning to cut corners will rush you past the details. Budget 30–45 minutes per interview. Bring the list.
Credentials and Protection (Questions 1–4)
These four protect you from the catastrophic end of the spectrum: unlicensed work, an injury on your property, or a contractor who disappears mid-job.
1. “Are you licensed for this work in my state, and can I see the license?”
Licensing varies by state — some require a general contractor license for any job over a few hundred dollars, others license only specific trades. What matters: the answer should include a license number you can verify on your state’s contractor board website. Angi’s guidance on the remodeling process is blunt about this: look for pros with the appropriate state licenses and knowledge to safely work with tile, plumbing, and electricity. (Angi) Write the number down. Actually check it.
2. “Do you carry general liability insurance and workers’ comp — and will your certificate name me?”
General liability covers damage to your home; workers’ compensation covers injuries to the crew. Ask for a certificate of insurance naming you as the certificate holder, current for your project dates. If a contractor says “my subs carry their own,” that’s fine — but ask question 6 next; it often turns out nobody checked.
3. “How many bathrooms have you remodeled in the last year?”
You need someone whose current work is bathrooms, not someone pivoting from decks because decks are slow. Five to ten bathroom jobs a year is a reasonable floor for a specialist.
4. “Can I see two recent bathroom projects and talk to one past client?”
Photos are marketing; a five-minute call with a past client is evidence. Ask the reference: Did the job finish on schedule? Were there surprise charges? How did they handle problems? Would you hire them again? One lukewarm answer tells you more than fifty five-star reviews.
The Team: Who Actually Does the Work (Questions 5–7)
Most bathroom remodels involve multiple trades, and how they’re organized is one of the biggest timeline factors. Angi notes that scheduling several subcontractors (plumber, drywall installer, electrician, tile installer) takes longer than a single crew doing it all. (Angi)
5. “Who will be in my house each day — your employees or subcontractors?”
Neither answer is wrong, but you need to know. If it’s subcontractors, ask who they are and whether they’re the same crew start to finish or whoever’s available that week. Consistency matters — the tile setter who demoed the shower knows what’s behind the old tile.
6. “Are your subcontractors licensed and insured?”
Plumbing and electrical work almost always requires licensed tradespeople. This Old House notes that substantial plumbing changes need a licensed plumber and that electrical work in wet areas is best completed by a professional. (This Old House) If the GC’s “electrician” is a handyman with a multimeter, walk away.
7. “Who is my day-to-day point of contact, and how do I reach them?”
Get a name and a phone number, not a company line that rings to voicemail. Ask how often you’ll get updates and who decides when something unexpected appears behind the tile.
Scope and Bid Clarity (Questions 8–10)
This is where bid comparisons live or die. A remodel runs from a few thousand for a cosmetic refresh to $30,000-plus for a full gut with relocated plumbing (Angi), so “same job” needs to mean the same thing to everyone.
8. “Will you give me an itemized bid — labor and materials on separate lines?”
An itemized bid separates demolition, plumbing, electrical, tile labor, tile material, fixtures, and so on. A single lump sum with “bathroom remodel” next to it is not a bid; it’s a hope. Itemization is also how you spot the bid that quietly excluded the tile (often $860–$2,800 per Angi’s component data) or the permit.
9. “What’s NOT included in this bid?”
This question is worth more than the other fourteen combined. Allowances (“tile allowance: $400”) are where budget overruns are born — your $400 allowance covers builder-grade ceramic, not the handmade-look tile you fell in love with. Ask for every allowance in writing and whether the bid includes fixtures you planned to buy yourself.
10. “How do you handle waterproofing, and what system do you use?”
A bathroom’s wet areas need a proper waterproofing system behind the tile — membranes, sealed seams, sloped pans. A contractor who waves this off (“we use cement board, that’s waterproof”) is telling you everything about their standards. You want a named system and a confident explanation, not a shrug.
Money: Payments and Change Orders (Questions 11–13)
Money disputes are the number-one source of contractor horror stories — these three questions prevent almost all of them.
11. “What’s your payment schedule?”
The honest industry pattern: a modest deposit to reserve your slot and order materials (commonly 10–33% depending on your state — some states cap deposits by law), then payments tied to completed milestones (demolition done, rough-ins passed, tile set, final walkthrough), with a meaningful final payment held until you’re satisfied. Never pay in full upfront, and never release the final payment before the final walkthrough. If a contractor demands 50% before starting, that’s a financing arrangement, not a payment schedule.
12. “How do change orders work — and what do they cost?”
Change orders are the mechanism for “we opened the wall and found rot.” The process should be: written description, written price, your written approval before the work happens — never after. Ask about the markup on change-order labor and materials; some contractors charge premium rates for changes because the work disrupts their schedule. That’s legitimate if disclosed. It’s extortion if discovered.
13. “What happens if the project runs over schedule?”
What you want is a contract that names a target completion window and explains what happens if the contractor’s own scheduling causes the slip. Some contracts include a per-day credit for contractor-caused delays past a grace period — and the conversation itself reveals whether this person plans realistically.
Warranty and Aftercare (Questions 14–15)
14. “What warranty do you offer on your labor, and for how long?”
One year on workmanship is the common floor for reputable remodelers; some offer two. Fixture and material warranties come from manufacturers and are separate. Get the labor warranty in the contract with specifics: what’s covered, how claims are filed, and response time. “We stand behind our work” is a slogan, not a warranty.
15. “If something leaks in six months, what exactly do I do?”
The right answer names a phone number, a response window, and a process. The wrong answer is a blank stare followed by “that never happens.”
Red-Flag Answers to Walk Away From
You don’t need all fifteen answers to be perfect — but any one of these is a walk-away:
- “We don’t need a permit for this.” (For a full remodel with plumbing or electrical changes, you almost certainly do.)
- “I need 50% down to get started.” Or worse, full payment upfront.
- “I can start tomorrow.” Reputable bathroom contractors are usually booked weeks out — immediate availability can mean nobody else will hire them.
- No written contract, or pressure to sign today for a “special price.”
- Can’t or won’t provide license number, insurance certificate, or references.
- The bid is dramatically lower than the others with no clear explanation — the low bid usually just excluded something the others included. (Why quotes vary)
If you’re still in the process of finding candidates, our guide to finding a bathroom remodeling contractor covers where to look and how to build a shortlist before you start interviewing.
The Printable 15-Question Checklist
Print this or copy it into your phone notes, then check off each answer per contractor and compare side by side.
- [ ] 1. License number — verified on state board site: ____
- [ ] 2. Insurance certificate received, naming me: ____
- [ ] 3. Bathrooms remodeled in the last 12 months: ____
- [ ] 4. Past client reference contacted: ____
- [ ] 5. Daily crew: employees / subs (names): ____
- [ ] 6. Subs licensed and insured: ____
- [ ] 7. Day-to-day contact name and number: ____
- [ ] 8. Itemized bid provided (labor + materials separate): ____
- [ ] 9. Exclusions and allowances listed in writing: ____
- [ ] 10. Waterproofing system named: ____
- [ ] 11. Payment schedule tied to milestones: ____
- [ ] 12. Change-order process in writing: ____
- [ ] 13. Schedule target + delay terms: ____
- [ ] 14. Labor warranty length and terms: ____
- [ ] 15. Leak-in-six-months process explained: ____
Frequently Asked Questions
How many contractor quotes should I get for a bathroom remodel?
Three is the practical minimum. Two gives you no tiebreaker; five turns into a part-time job. Make sure all three are bidding the same scope — same tile plan, same fixture list, same layout — or the comparison is meaningless. Our walkthrough of how to get comparable bathroom remodel quotes shows how to set up the process.
Should I choose the lowest bid?
Almost never on price alone. A bid that’s 30–40% below the others usually excludes something major — the tile material, the permit, the waterproofing system, or the haul-away. Compare itemized lines first. If the low bidder can explain exactly where the savings come from, that’s different from a bid that’s just thin.
What’s a normal deposit for a bathroom remodel?
It varies by state — several cap deposits by law, often around 10% or a fixed dollar amount. A common honest pattern is a modest deposit to secure the schedule and order materials, with the rest tied to milestones. Be wary of anyone asking for half or more before work begins.
Do I need a contract even for a small bathroom job?
Yes — even a $4,000 tub surround replacement deserves a one-page written agreement covering scope, price, payment schedule, and warranty. Verbal agreements are where “I thought that was included” goes to die. If a contractor resists putting it in writing, you’ve learned what you needed to learn.
Can I negotiate with a bathroom contractor?
You can negotiate scope more productively than price. Asking “what would this cost if we keep the toilet where it is?” or “what if I supply the tile?” produces real savings. Asking “can you do it for $2,000 less?” just produces a thinner bid with the same job description. Negotiate the work, not the number.
This is general information, not professional advice — get itemized bids for your project.