Kitchen Tap Replacement Costs UK — What to Charge to Swap a Kitchen Tap in 2026

Labour: Like-for-Like Tap Swaps

The bread-and-butter job is a straightforward like-for-like swap: a standard mono mixer tap replaced with another mono mixer, good access in the cupboard below, and working isolation valves on both supply pipes so you can shut the water off locally without draining the system. On a job like this you're typically in and out inside an hour.

• Standard like-for-like mono mixer swap, good access, working isolation valves: £60–£120 labour

Set a sensible minimum call-out. Even the simplest tap swap involves travel, parts and your time, so most plumbers won't leave the van for less than £60–£80 on a job like this. Charging by the hour on a quick swap usually undersells the value of the work — a fixed price for a known job type is cleaner for both you and the customer.

Labour: Awkward Jobs

The price climbs as soon as access or condition turns against you. The big cost drivers are seized fittings, no isolation valves (so the whole supply has to be drained down and refilled), tight cupboard access where you're working blind on your back, and corroded back nuts that fight you every turn. Any one of these can double your time on site; combine two or three and a "simple tap swap" becomes a two-hour job.

• Seized fittings, no isolation valves, tight access or corroded back nuts: £120–£200+ labour

The honest move is to flag this risk before you start. If you can't inspect under the sink before quoting, give a banded price — "£90 for a clean swap, up to £180 if the fittings are seized or there are no isolation valves" — so there's no awkward conversation when the back nut won't budge. Customers respect being told the truth up front far more than a surprise on the invoice.

Supply-and-Fit: Including the Tap

Plenty of customers would rather you supplied the tap as well as fitting it — it saves them choosing and means one company is responsible if anything goes wrong. Build a trade margin into the tap and present a single supply-and-fit price.

• Mid-range tap (the part itself): £40–£150
• Supply-and-fit total with a mid-range tap: £100–£300

The spread comes from the tap chosen and how awkward the install is. A budget mixer into an easy cupboard sits near the bottom; a £150 branded tap into a tight space with corroded fittings sits near the top. Always specify the exact tap model in your quote so there's no dispute about which you supplied.

Premium and Boiling-Water Taps

Instant boiling-water and 3-in-1 taps — Quooker-style and the many alternatives — are a different job entirely, and a much bigger ticket. The tap unit alone runs from a few hundred pounds to well over a thousand, and the install is far more involved than a standard mixer: you're fitting a tank and filter under the sink, connecting to a power supply, and often coordinating an electrician for a dedicated spur.

• Boiling-water / 3-in-1 tap (the unit itself): £300–£1,200+
• Supply-and-fit total including tank/filter install: £400–£1,500+

These jobs need more checks before you quote. There must be space under the sink for the boiler tank, a switched fused spur within reach, and adequate mains pressure. If a new electrical spur is required, factor in the electrician's cost (or your subcontract rate) and the fact that some units must be wired by a competent person to satisfy the warranty. Don't quote a boiling-water tap from a photo — survey it.

Isolation Valves and Small Add-Ons

If the existing supply has no isolation valves, fitting them while you're already under the sink is one of the easiest upsells in the trade — and it makes every future job (yours or anyone's) faster. It's a small add-on because you've already drained down and you're already in position.

• Fitting a new isolation valve while there: ~£15–£40 each

Recommend it routinely on older properties. Two isolation valves added during a tap swap means the next service can be done in minutes without draining the system — a genuine benefit to the customer and a small, fair line on your invoice.

Tap Types and What They Mean for the Job

The type of tap the customer wants changes both the part cost and the complexity of the install. Know the differences so you can advise properly and price accurately.

Standard Mono Mixers

The default kitchen tap: a single body with one or two levers controlling hot and cold through a single spout. These are the quickest to fit and the cheapest to supply. Most like-for-like swaps fall into this category.

Pull-Out Spray Taps

A mixer with a hose-fed spray head that pulls out of the spout for rinsing and filling pots. The tap costs more and the install takes a little longer because of the hose and weight assembly that has to be fed and seated under the sink. Worth checking there's clearance below for the hose to travel freely.

Instant Boiling-Water Taps

As above, these need a power supply under the sink, a tank and a filter — sometimes an electrician for the spur. They are the most involved kitchen tap install you'll do and should always be surveyed and quoted separately from a standard swap.

Technical Checks Before You Fit

A tap that's wrong for the system will dribble, hammer or fail early — and the customer will blame you, not the tap. Run through these before fitting.

• Water pressure (high vs low pressure taps): Gravity-fed systems with a tank in the loft often run at low pressure. Many modern taps — especially ceramic-disc models — are designed for high pressure and will trickle on a low-pressure supply. Check the tap's minimum bar rating against the system before you buy or fit.
• Flexible tap connectors: Most modern taps come with flexible tails. Make sure they reach the isolation valves comfortably and aren't kinked or over-stretched. Carry a selection of lengths and the right connectors for the pipe size.
• Ceramic-disc vs traditional washers: Ceramic-disc cartridges give a quarter-turn action and a long life but can be less forgiving on grit-laden or very low-pressure supplies. Traditional washer taps tolerate poorer water and lower pressure better. Match the mechanism to the system rather than just the customer's taste.
• Back nut and fixing condition: Inspect the existing back nut and fixings. Corroded fixings are the single most common reason a quick swap turns into a long one.

What Affects the Price

Four factors decide whether a tap swap is a £70 job or a £200 one. Check each before you quote:

• Access: Good cupboard access where you can reach the fittings easily keeps you at the bottom of the range. Tight, cluttered or boxed-in cabinets where you're working blind on your back push the price up.
• Isolation valves: Working isolation valves let you shut off locally and crack on. No valves means draining the supply down and refilling — added time and an obvious upsell to fit valves while you're there.
• Condition of existing pipework: Sound copper and clean fittings are quick. Corroded back nuts, seized compression joints and old pipework that needs care all add time and risk.
• Tap type: A standard mono mixer is the quickest and cheapest. Pull-out spray taps take a little longer; boiling-water and 3-in-1 taps are a different category of job with tanks, filters and power involved.

Quick Reference: Kitchen Tap Replacement Prices UK 2026