How to Find a Good Plumber: 8 Checks Before You Book

Updated July 2026 · 7 min read · Geelong Emergency Plumbing

Finding a good plumber in Australia is not complicated, but it requires about five minutes of due diligence that most people skip — and the gap between a good plumber and a poor one is measured in licence validity, insurance coverage, and what happens when the job doesn't go to plan. Here are the eight checks that separate a confident booking from a crossed-fingers one.

1. Verify the Licence

In Victoria, all plumbing work (including gasfitting and drainage) must be carried out by a registered plumber or drainage practitioner. The Victorian Building Authority maintains a public register at vba.vic.gov.au — search the plumber's name or ABN and confirm the licence is current, covers the class of work (plumbing, gasfitting, roof plumbing are separate licence classes) and isn't suspended or expired. It takes 30 seconds. Anyone who hesitates to provide their licence number when asked is providing the answer before you've asked the question.

2. Ask About Insurance

Public liability insurance (minimum $5 million is standard for trades) covers damage to your property during the work. Professional indemnity insurance covers consequential issues from advice or design. A one-liner on the phone — "are you licensed and insured?" — is entirely normal. Legitimate operators confirm it immediately; uninsured operators tend to change the subject.

3. Get a Quote in Writing Before Work Starts

A legitimate quote includes: the specific work to be done, the basis of pricing (fixed price or hourly with estimated hours), what's included (parts, disposal, compliance items), what's explicitly not included, and the procedure if scope changes. "About $X" verbally before work starts and "that'll be $3X, what took so long?" on the invoice is not a hypothetical scenario. Written quote, signed acceptance, work starts — in that order.

4. Check Reviews With Appropriate Scepticism

Google and Facebook reviews are useful with calibration: look at volume (10 reviews tells you less than 100), recency (a 2019 average doesn't describe 2026 quality), and how the business responds to negative reviews (professional response to legitimate criticism beats indignant denial). An overwhelming percentage of five-star reviews on a new listing warrants a moment's thought. Two-year-old businesses with 150 five-stars and zero detail in the reviews warrant a second moment's thought.

5. Ask Who Is Actually Doing the Work

Some businesses quote and subcontract — the licensed plumber who answered the phone isn't the person who shows up. That's not inherently wrong, but confirm that whoever attends holds their own licence and is covered by the same insurance. "Who will be on site and are they licensed?" is a reasonable question that any legitimate operator answers directly.

6. Assess the Communication Before the Job

A plumber who returns calls, quotes clearly, confirms the appointment and arrives within the agreed window is demonstrating, in miniature, how they'll handle the actual job. One who is hard to reach before the job started, vague on details, or casually late without contact is also demonstrating something — just something different. Communication quality before the job is diagnostic for communication quality during it.

7. Understand the Cheapest Quote

The lowest quote is worth having because it calibrates the market. It's not worth accepting without understanding why it's lower: missing compliance items, inferior parts, no warranty, unlicensed operator, or simply a lean efficient business. Ask what's included and compare scope, not just the number. A quote that's $200 cheaper because it doesn't include the pressure-limiting valve the system needs will cost $600 more at the next callout. Our plumber cost guide gives the typical ranges to compare against.

8. Ask for the Compliance Certificate

Notifiable plumbing work in Victoria — hot water systems, gas work, new drainage connections — requires a compliance certificate (also called a certificate of final inspection) lodged with the VBA. Ask upfront that this will be provided; it's a legal requirement, not a favour. The certificate is evidence that the work was done to standard, it's important for insurance purposes, and it's what a building inspector or conveyancer asks for when you sell. A plumber who reacts with surprise at this request is telling you something about how they operate.

One final practical note: the best time to find a good plumber is before you need one urgently. A 10-minute research session on a quiet Sunday — licence verified, one or two quotes compared for a minor job, business reviewed — means you have a trusted number in your phone for the 2am moment when pipes become philosophical. Emergency decision-making under pressure (literal and figurative) favours whoever answers the phone first; having already vetted your first call makes that moment considerably less expensive.

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