How to Find a Licensed, Reliable Plumber (Checklist)

Finding a good plumber is mostly a paperwork exercise, and that is good news. Before anyone touches a pipe, you can confirm a licence, read a quote, check insurance and ask a handful of direct questions. A plumber who passes those checks is usually the one you want. There is a second reason to do this: the work itself is regulated. Some jobs are notifiable, which means they must be done by a licensed tradesperson and reported to the regulator. If you skip the checks, you own the consequences when something fails, and an insurer can refuse a claim on work that was never compliant. This checklist walks you through what a licence covers in New South Wales, how to verify it, what a proper written quote looks like, what to ask before you book, and the warning signs that should end the conversation. It applies to any plumber, including ours.

What a NSW plumber's licence actually covers

In New South Wales, plumbing and gas fitting are licensed separately. That is the first thing to understand, because a licence number does not automatically mean the person can do everything a job might need. Plumbing work covers water supply, sanitary plumbing, drainage and roof plumbing. Gas fitting is its own licence, and gas work must be done by someone who holds it. If a job touches both, such as replacing a hot water system, check that the tradesperson holds both endorsements or that two licensed people are attending. Some work is also notifiable. Notifiable work must be carried out by a licensed plumber and reported to the regulator, and you should receive a compliance certificate when it is done. Work that is not notifiable still has to be done properly; it simply does not generate that paperwork. The point of this is simple. Licensing is more than a formality. It is how you know the person doing the work has the training, and it is what gives you somewhere to go if the work fails.

How to check that a licence is current

A licence can lapse, and an expired licence is no licence at all. Ask for the number in writing, then check it yourself rather than accepting a photo of a card. NSW Fair Trading publishes a public licence check where you can search by name, licence number or business. Enter the details and confirm four things: the licence exists, the name matches the person or business you are dealing with, the licence type covers the work you are booking, and the expiry date is in the future. Also confirm the number on the quote matches the number you looked up. A common problem is a quote carrying a licence held by someone else in the company. If the person who turns up is not the person on the licence, ask who is supervising the work and whether an apprentice is attending under supervision. It takes two minutes on your phone. Do it before the visit, not after the invoice arrives. Always check a plumber's licence number yourself on the NSW Fair Trading register before you book — it takes a minute.

Why insurance matters as much as the licence

Licensed tradespeople carry insurance, and you should see evidence of it before work starts. The main one to ask about is public liability insurance, which covers damage to your property or injury to someone on it if the work causes it. Ask for a certificate of currency rather than a verbal yes; it is a one-page document listing the insurer, the policy number and the cover period. Check the cover is current and that the business name matches the quote. Some residential work also falls under home warranty insurance, which protects you if the tradesperson cannot complete or fix the work. It applies to certain residential building work above a set value, and the rules around which plumbing work is covered are specific, so ask the business directly whether your job is covered and get the answer in writing. If a fault floods a room or damages a ceiling, insurance is the difference between a repair and an argument.

A written quote is not an estimate

These two words get used interchangeably, and they are not the same. An estimate is a guess with a number attached, and the final invoice can move. A written quote is a fixed offer for a defined scope, and a tradesperson who quotes a job is generally held to it. Ask which one you are getting, and get the answer in writing. A proper quote should set out the scope of work in plain language, the parts to be supplied, the labour, any callout or trip fee, whether the price includes GST, what is excluded, and what happens if a fault is found once work starts. It should also state whether the price is fixed or charged hourly, because those are very different bills. Be wary of a vague "from $X" verbal estimate; it gives you nothing to compare. For anything beyond a small repair, such as a pipe repair behind a wall or leak detection in a slab, ask for the quote as a document you can keep. Three quotes for the same written scope tell you far more than three verbal guesses.

Deposits and what a fair payment schedule looks like

A deposit is normal for larger jobs, because the plumber is buying materials before starting. What is not normal is a request for most of the money up front, in cash, before any work happens. Expect a deposit that covers materials, with the balance paid on completion and your acceptance of the work. For bigger jobs, staged payments tied to milestones are common. Ask for the schedule in writing and match each payment to something that has actually been done. Every invoice should carry the business name, an ABN and the licence number, and you should be able to pay by a traceable method. Cash-only pressure, or a request to pay into a personal account rather than a business one, is a reason to slow down. If the business cannot give you an invoice, it cannot give you a warranty you can enforce either. A cheap price paid in cash is expensive when something fails and there is no paperwork naming anyone.

References and recent local work

Reviews are useful and easy to fake. Local, recent, specific work is harder to argue with. Ask for two or three jobs completed in your area in the last few months, ideally similar to yours. Then ask a follow-up question: what was the job, how long did it take, and did anything go wrong? A tradesperson with nothing to hide will answer without hesitating. If you can, look at the finished work or ask for photos. Reviews on an independent platform are worth more than testimonials on the business's own website, so read the recent ones and read the middling ones. How a plumber responds to a complaint tells you more about the business than a page of five-star praise. If a job in a nearby street was done last month, knock on the door. People are usually happy to talk about a job that went well, and just as happy to warn you about one that did not.

Questions to ask before you book

Five questions cover most of the risk. Who will attend, and are they licensed for this specific work? Is the work notifiable, and will I receive a compliance certificate? What happens if you find a fault once you start, and how will you tell me before the cost changes? Is the price fixed or hourly, and what is the hourly rate if it is hourly? What is the warranty on the work and the parts, and how do I claim it? Add one practical question: how long will the job take, and will the water or gas be off during it? Write the answers down. A tradesperson who answers these clearly and without irritation is showing you how the whole job will go. If any answer is vague, or the response is that you do not need to worry about it, that is information too. A booked job is a relationship of a few hours or a few days, and the first conversation is the clearest preview you get.

Red flags that should stop the job

Some warning signs are worth acting on immediately. A request for a large upfront cash payment before work starts. No ABN, no licence number, or an unwillingness to put anything in writing. Pressure to decide today, or a price that drops if you pay cash. Anyone knocking on doors after a storm or flood, offering urgent work on a drain or roof, is a recognised pattern; legitimate businesses do not usually cold call in the days after a disaster. Be wary of a diagnosis made without looking, unnecessary work added to a job, or a blocked drain that somehow needs a full replacement. Be cautious of anyone who cannot tell you who employs them or who will be on site. None of these signs proves fraud on its own. Two or three together is enough to end the conversation politely and call someone else. Any plumber you book should put a price in writing, and any licensed plumber worth booking will do the same.

The certificate, warranty and paperwork trail

When notifiable work is complete, you should receive a compliance certificate. It records the work done, the licence holder, and that the work complies with the standards. Keep it with the invoice, the quote and the warranty documents, because you will need all of it if you sell the property or make a claim. Ask what warranty applies to the workmanship and to the parts, how long it runs, and who to contact if something fails. Parts warranties come from the manufacturer and can be longer than the labour warranty, but you usually have to go through the installer to claim. Note the date of completion and the date each warranty expires, then set a reminder somewhere you will actually see it. A folder with a quote, an invoice, a certificate and warranty details turns an argument into a five-minute phone call, and it is the difference between a repair that is covered and one you pay for twice.

Strata and insurance jobs work differently

If you live in a strata building, plumbing work may not be yours alone to approve. Anything affecting common property, including shared pipes and stacks, usually needs the owners corporation or strata manager involved, and some work needs a by-law or written approval before it starts. Gatekeeping here is easy to get wrong, so ask the plumber whether the work touches common property and tell your strata manager before booking. Insurance jobs follow their own path. If an insurer is paying, they often appoint their own plumber, and you may be directed to a make-safe first and a permanent repair later. Keep every receipt, report and photo, and ask the plumber to document the cause of the failure as well as the repair, because the cause is what the claim turns on. If the water is running right now, call your insurer before you authorise anything beyond making the site safe.