How much does a plumber cost?

When you call is the single biggest factor. A Tuesday morning appointment and a Sunday night emergency are different products at different prices, and the gap is often double or more. If the job can wait until a weekday, it is almost always worth waiting.

How the work is priced comes next. Hourly billing suits unpredictable jobs — tracing a leak, diagnosing low pressure — where nobody can say up front how long it will take. Fixed pricing suits known work, and shifts the risk of it taking longer onto the plumber rather than you.

Access and age of the property matter more than people expect. Modern plumbing on accessible pipework is quick. Old copper behind boxed-in panelling, or under a bathroom floor, means time spent getting to the problem before any repair starts.

Parts are usually charged on top of labour, sometimes with a markup. It is entirely reasonable to ask what the parts cost and whether you can supply them yourself — though be aware many plumbers will not guarantee a part they did not buy.

Almost every plumber charges for turning up, and this is where quoted hourly rates become misleading. A £45-an-hour plumber with a £90 call-out is more expensive for a twenty-minute job than a £70-an-hour plumber with no call-out.

The common structures are a flat call-out fee that includes the first thirty minutes or hour, a minimum charge of one hour regardless of how long the work takes, or a fixed price quoted for the whole job. All three are legitimate. What matters is knowing which one you are agreeing to.

Ask two questions when you book: what does it cost if you arrive and the job takes ten minutes, and is that rate different at weekends or after hours. Both answers should come without hesitation.

Out-of-hours plumbing is expensive because someone is leaving their evening or weekend to attend, often within a couple of hours. First-hour rates of £100–£200 are normal, and some firms charge a premium call-out on top.

Before paying emergency rates, work out whether it genuinely is one. A burst pipe, an uncontrollable leak or no water at all are emergencies. A dripping tap, a slow-filling cistern or a radiator that will not heat are not — they are Monday-morning jobs at half the price.

If water is escaping, find your internal stop tap and turn it off. It is usually under the kitchen sink or where the main enters the house. Knowing where it is before you need it is the most valuable plumbing knowledge a homeowner has, and turning it off can convert an emergency into an ordinary appointment.

Be wary of national call-centre operators that charge a premium to dispatch a local plumber. You are usually better off calling someone local directly.

Anyone working on gas appliances, including boilers and gas hobs, must by law be Gas Safe registered. This is not a nice-to-have or a trade body membership; it is a legal requirement, and it exists because the consequences of bad gas work are carbon monoxide poisoning and explosions.

Every registered engineer carries a Gas Safe ID card showing their licence number, their photo, an expiry date, and on the back the specific categories of work they are qualified for. Ask to see it, check the expiry, and check the category covers the work you need. You can verify a number on the Gas Safe Register website.

A plumber and a gas engineer are not the same qualification. Plenty of excellent plumbers are not registered for gas, and will tell you so — which is a good sign, not a bad one. Anyone offering to work on your boiler without being able to show a current card should be shown the door.

For any job where the scope is clear, ask for a fixed price. Replacing a tap, fitting a new toilet, swapping a radiator for one the same size — these are known quantities, and a plumber who does them regularly can price them confidently.

For diagnostic work, hourly is fairer to both sides. Nobody can quote a fixed price to find an intermittent leak without seeing it. What you can do is agree a cap: an hour or two to investigate and report back with a price for the fix, so you are not signing an open-ended commitment.

Get it in writing either way. A short message confirming the price, what it includes and whether parts are extra prevents almost every dispute that arises on small plumbing jobs.

Batch the small jobs. If you have a dripping tap, a loose toilet seat and a slow drain, get them all done in one visit — you pay the call-out once.

Avoid out-of-hours unless it genuinely cannot wait. The same job on a weekday morning is frequently half the price.

Know where your stop tap is and check it turns. A stop tap seized open is a small problem right up until the moment it is a very large one.

Be specific when asking for quotes. "Leak somewhere" gets a cautious, padded price. "Mixer tap dripping from the spout, kitchen, standard 15mm supply" gets a real one.

And get more than one price for anything non-urgent. Hourly rates vary widely for the same work, and posting the job to local plumbers costs nothing.