Who this guide is for
- Homeowners planning a full or partial bathroom refit
- People unsure whether one fitter covers all the trades involved
- Anyone worried about leaks and waterproofing
- Owners comparing several bathroom fitters
Understand what a bathroom fitter coordinates
Some fitters do most trades themselves, while others manage a small team or subcontract plumbing and electrics. Knowing which you are hiring tells you who is responsible for what and where the gaps might be.
Ask plainly how plumbing, electrical and tiling work are handled and who stands behind the finished room.
- Ask which trades the fitter does personally
- Find out who handles plumbing and electrics
- Confirm who is responsible for the whole room
- Check how trades are sequenced
Probe waterproofing and wet-area experience
Waterproofing failures are expensive and hidden, so this is where experience matters most. Ask how they approach wet areas and tanking, and ask to see bathrooms they have done that have stood up over time.
Treat vague answers about waterproofing as a reason to keep looking.
Check fixture fit and finishing
Bathrooms live or die on the details — how tiles meet, how the basin and toilet sit, how silicone lines look. Ask to see close-up finishing on past work and discuss how they handle awkward fixtures and tight spaces.
Confirm whether they fit fixtures you supply or only their own range.
- Ask to see close-up finishing on past work
- Discuss awkward fixtures and tight layouts
- Confirm if they fit owner-supplied items
- Check how tile and silicone junctions are handled
Compare quotes on the same scope
Bathroom quotes vary wildly because scopes differ. Give each fitter the same brief — layout, fixtures, finishes — so you compare like with like rather than guessing what is included.
Ask what could change the price once work uncovers the existing room.
Confirm credentials for regulated parts
Where the work touches plumbing or electrics, ask to see relevant qualifications and insurance for those trades. This is not optional reassurance — it is central to a safe, lasting bathroom.
Confirm who certifies any regulated work involved.
- Ask to see relevant trade qualifications
- Confirm insurance covers the work
- Check who certifies regulated elements
- Keep a record of what you verified
Hiring checklist
- 1Decide the scope and finishes before quoting
- 2Give each fitter the same written brief
- 3Ask which trades the fitter does personally
- 4Confirm who handles plumbing and electrics
- 5Probe waterproofing and wet-area experience
- 6Ask to see finishing detail on past bathrooms
- 7Confirm if owner-supplied fixtures are fitted
- 8Ask what could change the price mid-job
- 9Ask to see relevant qualifications and insurance
- 10Keep a record of what you verified
Common mistakes to avoid
- Comparing quotes that cover different scopes
- Skipping questions about waterproofing and tanking
- Assuming one fitter covers plumbing and electrics without asking
- Judging only the showroom photos, not finishing detail
- Ignoring credentials for the regulated parts of the work
- Not asking what happens if hidden problems appear
When to involve a professional
- Route plumbing, electrical and waterproofing work to qualified, insured professionals
- Ask to see relevant qualifications for regulated trades
- Confirm who is responsible if a leak or fault appears later
- Ask to see ventilation handled to avoid moisture problems
- Remember bathroom trade requirements vary by location and project
Frequently asked questions
Questions readers ask about this topic
Does one bathroom fitter do everything?
It varies — some do most trades themselves, others manage a team or subcontract plumbing and electrics. Ask directly who handles each trade and who is responsible for the finished room before you commit.
How do I judge waterproofing experience?
Ask how they approach wet areas and tanking, and ask to see bathrooms they have completed that have held up over time. Vague answers about waterproofing are a reason to keep looking, since failures are hidden and costly.
Why do bathroom quotes differ so much?
Usually because the scopes differ — different fixtures, finishes and what is included. Give each fitter the same written brief so you compare like with like, and ask what could change once the existing room is opened up.
Should I check qualifications?
Yes. Where the work touches plumbing or electrics, ask to see relevant qualifications and insurance for those trades. Requirements for regulated work vary by location and project.
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