How To Complain About a Plumber

Who do you complain to about a plumber?

It depends on what the work was and what you want out of it. The firm itself is the only route to getting the job finished properly. A regulator deals with competence and safety. A dispute scheme or the county court deals with money. No single body does all three, and expecting a regulator to refund you is the most common wasted month in any plumbing complaint.

Plumbing is not a licensed trade in this country, so anyone can trade as a plumber legally. What is regulated are specific activities inside the job: gas appliance work, unvented hot water work, and anything connected to the mains supply. The tap, the waste, the radiator and the immersion element sit under general consumer law and nothing else.

• The firm: the only route to a return visit, a redo, or a refund by agreement
• Gas Safe Register: anything involving a gas appliance, including work by someone unregistered
• Your water company: installations that risk the supply or breach the water fittings rules
• Landlord, agent or freeholder: rented homes, and communal plant in a block
• A trade body or dispute scheme: only if the firm is a current member
• Card provider or small claims: when what you want back is money

Complain to the firm first, and say exactly what you want

Do it even when you never want that person in the house again. The Consumer Rights Act 2015 makes repeat performance the first remedy where work was not carried out with reasonable care and skill, meaning the trader returns and redoes it at their own cost. Every external route will ask whether you gave them that chance.

If the problem is the individual rather than the firm, ask in writing for a different engineer. That keeps you inside the process. We run twenty engineers, so sending someone else to a job with history on it is routine rather than a favour.

You are not obliged to allow attempt after attempt. Two failed visits on the same fault is where most reasonable people stop, and you can say in writing that a third ends it. Where the work is genuinely unsafe, deal with the danger immediately and argue about the bill afterwards.

What should a complaint about a plumber contain?

Six things: the address and date of the work, the invoice or job number, what was agreed, what is actually wrong, what you want done, and the date by which you want it. Attach photographs and keep it under a page. Long emails full of feeling get skimmed and filed. Short factual ones get a diary slot.

Name the component rather than the appliance. A complaint saying the tundish under the cylinder drips continuously tells an engineer far more than one saying the cylinder is faulty, because the first points at a pressure reducing valve or a relief valve and the second points at nothing.

Be precise about which of three things went wrong, because the remedy differs. Either the work was done badly, or it was the wrong work because the diagnosis was wrong, or it was never finished. Finish with what happens if your deadline passes, stated calmly and once.

Do not throw away parts that were removed or fitted. A failed valve, a fitting used on the wrong pipe material, or an undersized pump is physical evidence, and in a dispute it is worth more than any amount of description.

How do you complain about gas work?

Report it to the Gas Safe Register, including any case where you suspect the person was not registered at all. The Register investigates the engineer, can arrange an inspection where there is a safety concern, and can act against the registration. It cannot refund you, so this route runs alongside the money route rather than instead of it. If you are not certain the engineer was registered on the day, how to check a plumber on the Gas Safe Register is the first thing to establish, because the answer decides which of the two routes you are actually on.

Have the details ready: the registration number from the card you should have been shown, the date of the visit, the make, model and serial number from the appliance, and the paperwork you were left or the fact that you were left none.

Unregistered gas work is a different conversation. That is not poor workmanship, it is work that should never have been carried out, and the Health and Safety Executive runs a gas safety reporting line for exactly that. Describe the installation and what is missing. A report saying the commissioning section of the manufacturer documentation was left blank gets read. One calling someone a cowboy does not.

If an engineer has classed an appliance as at risk or immediately dangerous and disconnected it, leave it disconnected. Turning it back on to get through a cold weekend is unsafe, it is an offence, and it will wreck your position in any dispute about the original work.

Complaining about work on the water supply and fittings

Anything touching the incoming mains or the fittings connected to it is your water company's territory. Suppliers across the London area employ water regulations inspectors, and you can report an installation you believe breaches the water fittings rules. They inspect and can require the work to be corrected, because contamination reaches your neighbours as well as you.

What they care about is not aesthetics. It is backflow: an outside tap or hose union without the right protection, an appliance connected so it could draw water back into the main, a cistern without an adequate air gap, or work that disturbs an old lead service pipe without addressing it.

Complaining as a tenant, or about a block

If you rent, complain to the landlord or the managing agent, not to the plumber. The plumber was instructed by them and owes you nothing directly. Put it in writing, and if the disrepair is left unresolved take it to the local authority environmental health team, which holds powers over hazards in rented housing that no plumbing body has.

Social housing follows a defined path: exhaust the landlord's own complaints procedure, get the final response in writing, then go to the Housing Ombudsman. Private landlords sit outside that scheme, but letting and managing agents in England must belong to a government approved redress scheme, so an agent who ignores you has a body above them.

Blocks bring their own argument, usually about the boundary. Communal plant and a shared hot water main are the freeholder's responsibility, discharged through the managing agent and whichever contractor holds the maintenance contract. The unit inside your flat, which in a great many purpose built London blocks is a thermal store such as a Pulsacoil, is often yours. Read the lease first, because a good half of these complaints are aimed at the wrong party.

Trade bodies, dispute schemes and Trading Standards

Check membership before you spend a week on any of them. An association can only act against its own members, and logos outlive memberships on websites for years. Ring them and ask whether the registration is current. Where the firm does belong to a consumer code or an approved dispute resolution provider, use it. Alternative dispute resolution is a decision reached on documents by someone independent, it costs the consumer little, and under a binding scheme the outcome binds the business. The catch is that participation is voluntary for most plumbing firms, so one that wants to stall simply declines.

Trading Standards is not a complaints service for individuals. Reports go through the Citizens Advice consumer service, which advises you and passes the intelligence on. They act on patterns and on the practices the law targets: aggressive selling in the home, misleading pricing, and pressure applied to people who never went looking for the trader.

One useful right sits here and almost nobody uses it. Where you agreed a contract for work in your own home rather than at the trader's premises, you normally have fourteen days to cancel, and the trader must tell you so in writing. If no cancellation notice was given, that period extends well beyond fourteen days and the failure is itself an offence.

The money routes: card provider and small claims

If you want money back, the card provider is usually fastest and the courts are the backstop. Where any part of a bill over one hundred pounds went on a credit card, section 75 of the Consumer Credit Act makes the card provider jointly liable for breach of contract, and you claim from the provider directly. Debit payments fall outside section 75, but chargeback may apply and the window is short.

This is the best reason to pay for substantial work by card rather than bank transfer. A transfer leaves you with the trader and nothing else, and a limited company that dissolves takes the claim with it. A sole trader is personally liable and does not vanish with a company number, so check Companies House.

The small claims track is built for this. Send a letter before action setting out the claim, the breach and a deadline, then issue online if it is ignored. It works without a solicitor, and these cases are decided on documents: the quote, the invoice, the photographs, and a second engineer's report describing the defect.

What outcomes are realistic?

The most likely good outcome is the firm returning and fixing the work, or a partial refund negotiated because neither side wants to spend a day in a county court. Full refunds are uncommon where part of the work still has value. Regulators award no compensation at all. A court awards money, not an apology, and it takes months.

What you can recover is loss you can evidence: the cost of putting the defective work right, damage caused by it, and reasonable costs forced on you while a property was unusable. What you will not recover is your time. Keep the corrective invoice itemised so it is obvious which part relates to the original defect, and ask the second engineer to record what they found before changing anything.

Be honest about timescales. A firm that intends to engage answers within days, a dispute scheme takes weeks, and a small claim often runs months to a hearing. None of that restores your hot water, so getting the work corrected by someone competent and pursuing the money separately is usually the right sequence rather than a surrender. Where the sum is modest, writing it off and spending the energy on how you choose the next firm is a decision rather than a defeat: a registration you check yourself, a written scope naming the parts and the work, and a diagnosis that follows an inspection rather than arriving over the phone.

Reviews and social media are not a remedy. They recover nothing, and stating as fact something you cannot prove carries real legal risk to you. If you review afterwards, describe what happened to you and avoid characterising the individual.