How to Quote a Plumbing Job That Wins the Work

What a plumbing quote needs to include

A quote is really a small contract-in-waiting, so it needs enough detail that both of you know exactly what's been agreed. Nine things, every time:

1. 1Your business details — name, logo, contact details, and your Gas Safe registration number if any part of the job involves gas.
2. 2The customer's name and the site address — older properties and awkward access (lofts, under-floor runs) genuinely change your costs.
3. 3A quote number and date.
4. 4Itemised line items — never one lump “plumbing work” figure.
5. 5What's not included — tiling, making good beyond a first-fix patch, decorating, and disposal of anything beyond the parts you removed.
6. 6Compliance notes — Gas Safe registration for gas work, WRAS-compliant fittings noted where it matters (filtration, backflow prevention).
7. 7Subtotal, VAT (if applicable), and the total.
8. 8A valid-until date — 14–30 days is standard; boiler and copper prices move with the market.
9. 9Payment terms and how to accept — deposit for materials on bigger jobs, and a single clear next step.

If your quote has those nine, you're already ahead of most of the competition — a surprising number of plumbing "quotes" are still a number texted after a five-minute look under the sink.

How to price the job before you write a number

The document is the easy half. Pricing is where the job stays profitable — or quietly stops being worth doing, especially once you're behind a wall you didn't expect to open.

Break the job into what it actually costs

List every stage separately: call-out and diagnosis, parts and materials, first and second fix labour, testing and commissioning, and disposal of anything you're taking away. Itemised quotes get accepted more readily than a single number, and they let a customer trim a line — swap a mid-range tap for a budget one — instead of walking away from the whole quote.

Three things plumbers routinely forget to charge for

• Call-out and diagnosis time on its own, separate from the fix — working out what's actually wrong is a real cost even before a spanner touches anything.
• Provisional sums for hidden pipework — old lead or lead-soldered joints, a stopcock that seizes the moment you touch it, isolation valves that need replacing rather than just closing.
• Disposal of the old unit — a boiler or cylinder needs a licensed waste carrier, not a trip to the tip in the van.

Then add 15–20% margin on top of your costs to cover the call-outs that don't convert, van and tool running costs, and the insurance that lets you work in someone's home in the first place.

A worked example

Here's a full bathroom suite replacement, quoted the right way:

Existing pipework assumed sound based on the site visit. If concealed pipework needs replacing once the old suite is out, additional labour is charged at £55/hour and agreed with you before any extra work starts. Quote valid for 21 days. 30% deposit to book materials, balance on completion. To accept, reply to this email or tap Accept on the quote.

That's the whole thing — itemised, honest about the one thing that can't be known in advance, and nothing left for the customer to assume.

Five details that get plumbing quotes accepted faster

• Send it within 24 hours. Speed matters more in plumbing than almost any other trade — a customer with an active leak or a dead boiler is comparing quotes today, not next week.
• Make it look like a document, not a text message. A branded PDF with your Gas Safe number on it does more to justify the price than the same figures in a WhatsApp message.
• Name the provisional sum instead of hiding it. “£55/hour if we find X, agreed with you first” reads as honest. A suspiciously low headline number that turns into a much bigger invoice reads as the opposite — and that's the review that costs you the next ten jobs.
• Make accepting effortless. A customer weighing up three plumbers picks the one that's easiest to say yes to — one tap or one reply beats print, sign, scan every time.
• Follow up once, professionally. A short “happy to answer any questions, or talk through the tap and fittings options” a few days later recovers jobs that got buried under two other quotes.

The fastest way to do all of this

Building the document above from scratch — line items, provisional sums, VAT, a valid-until date — takes 30–45 minutes in a Word template each time. Fine for the odd job; a real dent in your evening once you're quoting several jobs a week between call-outs.

This is exactly why QuoteRocket exists. You describe the job in plain English — "strip out old bathroom suite, supply and fit new bath, basin and WC, new shower valve and enclosure" — and it turns that into a branded, itemised PDF quote in under a minute: line items, prices you can adjust, VAT, valid-until date, the lot. Your customer accepts it with one tap on their phone, and an accepted quote becomes an invoice in one click. It's free to try, and while it started life quoting landscaping jobs, plumbers and electricians have been two of the fastest-growing trades on it since.

Whatever tool you use to produce it, the principles hold: itemise everything, price your call-out and diagnosis time honestly, flag what's provisional instead of guessing, and make saying yes effortless.

Frequently asked questions

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