Plumbing quotes are tricky in a very specific way: the job you can see is rarely the whole job. You survey a bathroom, price the suite and the tiling and the waste fittings — and on day one you find the old pipework is 1/2" imperial copper that doesn't mate cleanly to modern compression fittings. Or the soil pipe is blocked and needs rodding before the new WC goes in. Or the customer assumed you'd replace the section of floor where the old bath has been dripping for three years.
Managing this uncertainty is part of being a good plumber. But it shouldn't mean you're quoting from rough memory and hoping for the best. AccuQuote was built with over 200 UK tradesmen who were all losing money the same way — and this guide covers how to stop.
The Unique Challenges of Plumbing Quotes
Variable pipe routes
Where does the soil pipe actually run? How far is the boiler from the hot water cylinder? Is the heating system a combi, a system, or an old gravity-fed S-plan with a tank in the loft? These things determine how much pipe you need and how hard the job is, and you often can't tell without opening some walls. Plumbing quotes need to reflect this uncertainty honestly rather than ignoring it and arguing about it later.
Material cost volatility
Copper pipe, push-fit fittings, radiators, valves — prices from Plumb Center, Toolstation and Screwfix all shift regularly. A boiler price can move by £150 in six months. If your quote was based on a price you saw three months ago, you're either absorbing the difference or explaining yourself to the customer.
Job type complexity
A bathroom fit-out and a boiler swap and an emergency leak repair are three completely different jobs. They require different materials, different tools, different skill sets and different time estimates. Generic quoting software that just gives you a blank form isn't much help. You need templates that understand what a typical bathroom refit involves versus a combi boiler swap versus a radiator addition.
Gas Safe certification costs
If you're Gas Safe registered and doing boiler work, the certification cost and any commissioning fees need to be in the quote. They often aren't, because they feel like overhead — but they're not overhead, they're a direct cost of that specific job.
The forgotten cost: A Benchmark commissioning document and boiler registration currently costs around £55–75 in time and fees. A Landlord Gas Safety Record (CP12) is around £65–90 to produce. Neither typically makes it into a rough quote. Both absolutely should.
What Plumbing Quoting Software Should Handle
To be genuinely useful for a plumber, quoting software needs to:
- Know common job types. Bathroom suite supply and fit, boiler swap, new radiator, heating system flush, leak investigation and repair — each has a typical bill of materials and labour estimate that you refine rather than building from scratch.
- Price materials from real suppliers. Screwfix, Toolstation, Plumb Center, City Plumbing — current prices, not placeholder figures. A Grohe shower valve costs very differently depending on range. The quote needs to reflect what you'll actually spend.
- Handle contingency for hidden work. Add a clearly-labelled contingency for "investigation/access" rather than quietly padding the margin. Customers who can see a contingency line understand why it's there — customers who discover the "hidden" markup don't.
- Include Gas Safe and certification costs. As standard line items, not afterthoughts.
- Work quickly on site. You can't spend 45 minutes in someone's bathroom typing up a quote on a phone. The tool needs to be fast — scan, describe, review, send.
How AccuQuote Works for Plumbers
AccuQuote is designed to be used on-site on an iPhone. For a bathroom survey, the process looks like this:
- Scan the bathroom with LiDAR. The app captures room dimensions in about 20 seconds. Floor area and wall measurements are used to calculate tiling quantities, waste pipe runs and towel radiator sizing.
- Describe the job. "Full bathroom refit, existing cast-iron bath, separate shower not required, new close-coupled WC, new basin and pedestal, new bath, chrome fixtures throughout, half-tile to bath surround and basin splash, vinyl floor, new radiator." AccuQuote parses this into a structured scope.
- Review the bill of materials. The app generates a list: close-coupled WC suite (with Screwfix/Plumb Center SKU), basin and pedestal, bath, bath waste and overflow, trap and waste fittings, isolation valves, flexible connectors, silicone, wall anchors. You review and adjust for the specific products the customer has chosen.
- Add labour and certification. Set your day rate (£240–320/day for most UK plumbers), estimate days, add Gas Safe cert costs if applicable.
- Send the quote. Clean PDF to the customer's email. Itemised breakdown of materials and labour. Total with VAT.
Example: Full Bathroom Suite Refit Quote
Here's a realistic breakdown for a standard bathroom refit in a three-bed semi in the North West — removing old bath/WC/basin and fitting a new suite. No structural changes, existing soil pipe, existing tile backer. 3 days' work.
| Item | Supplier / Spec | Qty | Unit Cost | Total |
|---|---|---|---|---|
| Close-coupled WC suite (white) | Roca Nexo / Screwfix | 1 | £185 | £185 |
| 600mm basin and pedestal (white) | Ideal Standard / Plumb Center | 1 | £140 | £140 |
| P-trap, bottle trap, waste | Toolstation / chrome | 2 | £18 | £36 |
| Bath (1700x700mm, steel, white) | Bette / Plumb Center | 1 | £220 | £220 |
| Bath waste and overflow (chrome) | Toolstation / Wirquin | 1 | £32 | £32 |
| Basin mixer tap (chrome) | Bristan / Plumb Center | 1 | £65 | £65 |
| Bath filler/shower mixer | Bristan / Plumb Center | 1 | £95 | £95 |
| Isolation valves (x4) and flexible tails | Toolstation | set | £28 | £28 |
| Chrome towel radiator (400x800mm) | Screwfix / Terma | 1 | £75 | £75 |
| Radiator valves (TRV + lockshield) | Toolstation | pair | £22 | £22 |
| Silicone sealant, PTFE, jointing compound | Screwfix | — | — | £18 |
| Miscellaneous fittings and fixings | — | — | — | £30 |
| Materials subtotal | £946 | |||
| Strip-out and disposal (half day) | £130 | |||
| Fit and commission (2.5 days @ £280/day) | £700 | |||
| Total (ex. VAT) | £1,776 | |||
This is a realistic price for a straight swap-out in the North West in 2025. The customer gets an itemised breakdown so they can see what the suite costs versus the labour — which is exactly what a customer comparison-shopping will want to see. It builds trust and reduces negotiation on price.
FAQs About Quoting Plumbing Work
How do I price a boiler swap in the UK?
A standard combi boiler swap (like-for-like position, no flue extension, existing pipework in good condition) typically runs £1,800–2,800 all-in including the boiler, labour, new controls, commissioning and Gas Safe documentation. Worcester Bosch and Viessmann are at the premium end; Vaillant and Ideal sit in the mid-range. Always get merchant pricing on the boiler before quoting — retail prices and trade prices differ significantly at Plumb Center or City Plumbing.
Should I charge a call-out fee for leak investigations?
Yes. A leak investigation is a diagnostic job — you're spending time and expertise identifying the source, not just fixing it. A £75–120 investigation fee, credited back against the repair quote if the customer proceeds, is standard practice and protects you from spending two hours on a job that turns out to be a hairline crack behind a tile.
How do I handle plumbing jobs where the price depends on what you find?
Clearly scope what is included and what isn't in your quote, with a contingency line for investigative work. "Quote is based on existing pipework being in good condition. Any replacement of corroded or non-compliant pipework found during works will be charged at £X/hour plus materials." Customers who see this upfront are never surprised.
What's a fair day rate for a plumber in the UK in 2025?
Sole trader plumbers in most of England charge £240–320/day in 2025. London and South East runs £320–420/day. Gas Safe-registered plumbers doing heating and boiler work tend to be at the higher end of these ranges. When quoting labour, be explicit about whether your day rate includes materials markup or whether materials are priced separately at cost.
Start Quoting on Site with AccuQuote
Plumbing quotes done properly win more jobs and cause fewer arguments. AccuQuote was built with 200+ UK tradesmen who were tired of discovering their quote was wrong when the bill landed. Three free quotes — no card, no call, no salesperson.