How to Quote Bathroom Installation Jobs and Win Them

Never quote a bathroom installation without visiting the property. No exceptions. Experienced plumbers who've tried to quote bathrooms from photos or phone calls have stories about the resulting disasters — quotes that bore no resemblance to the actual job, disputes over scope, and jobs that ran at a loss.

What you can only assess on site:

• Existing pipework routes — Where are the water supply and waste pipes? Are they in the floor, wall, or ceiling? Will new sanitaryware line up, or does pipework need extending or rerouting?
• Structural condition — Is there evidence of damp, rot, or existing leaks? Are walls square? Is the floor structurally sound? Problems discovered mid-job cost you time and the customer money.
• Soil pipe location — Where does the toilet waste connect? Is there adequate fall? Can a new toilet go where the customer wants?
• Access for materials and waste — Can a bath or large shower tray get through the door? How will you remove the old suite?
• The customer's vision — Photos and descriptions rarely capture the full picture. A site visit lets you understand exactly what the customer wants and whether it's achievable in the space.

The survey visit is also an opportunity to establish trust. Customers choosing between three quotes are looking for someone they feel confident in. Turning up, asking intelligent questions, and clearly understanding their project wins more jobs than the cheapest price.

A professional bathroom quote should be detailed enough to set clear expectations, without being so granular that every line item becomes a negotiation. The right structure:

Section 1: Scope and inclusions — A plain-English description of exactly what the quote covers. "This quote covers strip-out and disposal of the existing suite; supply and installation of [list items]; connection of all plumbing; [tiling/not tiling]; decorating [included/excluded]; building regulation compliance." Be explicit about what is NOT included — this prevents scope creep disputes.

Section 2: Labour — You can either state a total labour cost or break it into phases (strip-out, plumbing first-fix, plumbing second-fix, tiling if applicable). Breaking into phases helps customers understand where the cost lies and is especially useful if they're supplying some services themselves (e.g. a separate tiler).

Section 3: Materials — List key items (sanitaryware, shower tray, enclosure, taps, valves) with make/model or specification. Include your supply prices. For customer-supplied goods, note that you'll install them but can't warranty the supplied items themselves.

Section 4: Provisional sums — Be honest about unknowns. "Provisional sum of £150 for any additional waste connection work — final cost depends on what we find when the floor is opened." This is far better than hiding contingency in your main price and having an awkward conversation later.

Section 5: Terms — Payment schedule (typically 30–40% deposit, stage payment on second-fix completion, balance on sign-off), payment method, and what happens if scope changes.

Bathroom pricing requires careful calculation because there are so many variables. A systematic approach:

Labour hours breakdown (example for a standard bathroom refurbishment):

• Strip-out and disposal: 3–5 hours
• First-fix plumbing (pipework modifications, waste runs): 4–8 hours
• Board and prepare (if you're including this): 3–6 hours
• Second-fix plumbing (fitting sanitaryware, taps, shower): 6–10 hours
• Commissioning, snagging, cleanup: 2–3 hours

Total typical range: 18–32 hours for a standard bathroom. At £65–£90/hour, labour cost is £1,170–£2,880.

Materials: A mid-range bathroom (Ideal Standard or equivalent quality) typically costs £1,500–£2,500 in sanitaryware, including bath/shower tray, enclosure, WC suite, basin, taps, towel rail, and valves. Add a 25–30% mark-up to arrive at your materials charge.

Waste disposal: A skip for a bathroom strip-out costs £200–£350. If you're using a van run to the tip, charge £80–£150 plus your time.

Total typical range: £3,500–£6,500 for a standard mid-range bathroom refurbishment. High-end finishes, unusual layouts, or significant pipework rerouting can push this to £8,000–£12,000+.

A great quote isn't just numbers — it's a professional document that builds confidence. The plumber who sends a WhatsApp message with a total figure will lose to the plumber who sends a clear, detailed PDF every time, even if the WhatsApp price is lower.

Use job management software to generate branded quotes. Tools like Tradify, Jobber, or Tradejoy take 15 minutes to set up properly and produce professional PDFs that include your logo, company details, and all the terms. This is table stakes in 2026.

Follow up. Send the quote within 24–48 hours of the site visit while the conversation is fresh. Then follow up 3–5 days later if you haven't heard back: "Just checking you received the quote — happy to answer any questions or talk through any parts of it." This simple step wins a surprising number of jobs that would otherwise go quiet.

Don't compete purely on price. If the customer says you're more expensive than another quote, ask what the cheaper quote includes. Often cheaper quotes have omissions — no waste disposal, customer supplies their own materials, decorating not included. Help the customer compare like for like. If your quote genuinely includes more, say so clearly.

Bathroom installations are disruptive. Customers often underestimate the disruption, and plumbers who don't set expectations upfront create problems for themselves when a customer is frustrated by noise, dust, or delays.

Tell customers upfront: how many days the job will take, what hours you'll be on site, whether they'll have water and toilet access each night, and what the mess situation will look like. This isn't catastrophising — it's professionalism. Customers who know what to expect are easier to work with and more likely to leave good reviews.

Agree a process for change orders. When customers change their mind mid-project (they almost always do), have a simple system: changes are discussed, a revised price is agreed, and the customer signs off before you do the additional work. A WhatsApp message with "yes please do that" followed by a small invoice is fine. The key is that changes are documented, agreed, and paid for.