How to Price a Bathroom Installation

A bathroom is one of the most profitable jobs a plumber can take on — and one of the easiest to underprice. There are dozens of moving parts, a fortnight of your labour on the line, and a customer who'll happily compare your number against the cheapest quote on the street. Get the pricing wrong and you're working for nothing for two weeks.

The good news is that pricing a bathroom isn't guesswork. Once you break it down into labour, materials and margin, it becomes a repeatable process. Here's how to do it properly.

Start by Scoping the Job Properly

You can't price what you haven't scoped. Vague quotes are where money disappears, so before you put a number to anything, get clear on exactly what's involved.

Walk the room and pin down:

• The size and layout — like-for-like swap, or are you moving the soil pipe, basin or shower?
• What's coming out — strip-out and disposal of the old suite, tiles and flooring all take time.
• Hidden work — re-routing pipework, new waste runs, upgrading the electrics for a shower or extractor.
• Wall and floor condition — boarding, levelling, tanking a wet area or replacing rotten subfloor.
• The finish — fully tiled walls take far longer than half-height or panelled.
• Who supplies what — are you buying the suite and tiles, or is the customer?

A site visit nearly always pays for itself here. The difference between a like-for-like refit and a full re-plan can be a week of labour, so never price a bathroom over the phone.

Work Out Your Labour First

Labour is the biggest cost in a bathroom and the one tradespeople most often get wrong. A standard domestic bathroom typically takes anywhere from five to ten working days depending on size, finish and how much you're moving around.

Decide whether you're pricing on a day rate or a fixed price for the job. Most experienced fitters price the whole job, but they build it up from days. Estimate the days honestly — strip-out, first fix, boarding and tanking, tiling, second fix, sealing and snagging — then multiply by your day rate.

If you don't have a reliable day rate yet, work it out properly before you quote anything. Our guide on how to calculate your hourly rate walks through covering your overheads, not just your time on the tools.

Always add a contingency of at least half a day to a day. Bathrooms hide surprises behind the old tiles, and that buffer is the difference between a profitable job and a stressful one.

Don't forget the trades you bring in. If you're subbing out the tiling, electrics or plastering, get their prices in writing before you commit to yours.

Cost Up the Materials

Materials on a bathroom can run from a budget suite to several thousand pounds of premium fittings, so treat them as a separate line, not a rough guess.

Itemise everything:

• Suite — toilet, basin, bath and/or shower enclosure
• Brassware — taps, valves, waste, shower mixer
• Pipework, fittings, soil and waste
• Tiles, adhesive, grout and trims
• Boarding, tanking kit, sealant
• Extractor fan, lighting, flooring
• Consumables and skip hire for disposal

Add your markup on top of trade price. You're sourcing, collecting, storing and standing behind these goods, so charging them at cost is leaving money on the table. As a rough guide many fitters add somewhere in the region of 10–25% on materials — see material markup: how much should you add? for how to land on the right figure for your business.

If the customer insists on supplying their own suite, make it clear in writing that you're not responsible for faults, shortages or delays caused by their goods.

Add Margin, Overheads and the Awkward Extras

Labour plus materials isn't your price — it's your cost. On top of that you need to cover overheads (van, fuel, insurance, tools, phone, admin time) and a genuine profit margin. If you're fuzzy on the difference between marking up and working to a margin, markup vs margin clears it up.

Build in the things that quietly eat profit:

• Disposal — skip hire or tip runs for the old suite and waste.
• Parking and access — permits, restricted parking, long carries up stairs.
• Making good — plastering, decorating and snagging at the end.
• Compliance — any notifiable electrical work and the relevant certification, plus correct waste handling. Always check the current rules rather than assuming what applied last year.

For a structured way to layer all of this together, how to price a job for profit gives you a formula you can reuse on every bathroom.

Structure the Payment and Present the Quote Clearly

A bathroom ties up your time and your cash for weeks, so never fund the whole thing yourself. Take a deposit to secure the booking and cover initial materials, then stage payments against milestones — for example on completion of first fix and again on handover. Our guide on deposits and staged payments shows how to structure this fairly.

Presentation wins jobs. A clear, itemised, professional quote sent the same day beats a scribbled number sent three days later — even when yours is dearer. This is where a job-management system like Gaffer earns its keep: you build the quote from a saved template on site, send it before you've left the drive, and the customer can accept it on their phone. When the job's done, the invoice and payment reminders go out automatically, so you spend the evening with your feet up instead of chasing money.

If slow quoting is costing you work, it's worth reading why you are losing jobs to slow quotes — speed often matters as much as price.

Don't Compete on Price Alone

There will always be someone cheaper. Trying to beat them on price is a race to the bottom that ends with you doing more work for less money. Compete instead on clarity, reliability and a finish you're proud of.

When a customer pushes back on your number, you should be able to explain exactly what they're paying for. An itemised quote does most of that work for you, and it makes the too expensive objection much easier to handle.

FAQs

How long does it take to fit a bathroom?

A typical domestic bathroom usually takes around five to ten working days, depending on size, the standard of finish and how much pipework or layout is being changed. Always price from your own day estimate rather than a rule of thumb.

Should I charge for a bathroom quote?

Most plumbers don't charge for a standard bathroom quote, as a free, professional quote is part of winning the work. For a detailed design or measured survey, charging a fee you refund against the job is reasonable.

How much deposit should I take for a bathroom installation?

Take enough to cover your initial materials and secure the booking, then stage the rest against milestones. The exact amount is up to you, but funding weeks of materials and labour out of your own pocket is a cash-flow trap worth avoiding.

Should I supply the bathroom suite or let the customer buy it?

Supplying it yourself adds margin and keeps you in control of quality and timing. If the customer supplies their own, put in writing that you're not liable for faults, shortages or delays caused by their goods.