How to Spot a Dodgy Tradie NZ — Red Flags and How to Protect Yourself

New Zealand's consumer protection laws are among the strongest in the world, but that doesn't protect you from a cowboy builder who takes your deposit and disappears, or a "plumber" who botches a job and can't be held to account because they weren't licensed. Here's how to identify the warning signs before you hand over any money.

The Red Flags: Warning Signs Before You Start

1. They Won't Provide Proof of Licence

For regulated trades in NZ, there is no legitimate reason for a tradie to refuse to provide their licence number:

Electricians must be registered with the Electrical Workers Registration Board (EWRB) — you can search their public register
Plumbers, Gasfitters, Drainlayers must be registered with the Plumbers, Gasfitters and Drainlayers Board (PGDB) — searchable online
Builders doing restricted building work must be a Licensed Building Practitioner (LBP) — searchable register

A refusal or deflection ("my certificate is at home", "I've been doing this 20 years so I don't need one") is a serious red flag. Verify on the register yourself — don't accept their word for it.

2. Cash Only, No GST Receipt

Legitimate tradies generally accept payment by bank transfer, credit card, or cheque. "Cash only" requests are sometimes innocent (small operators) but are also the signature of tradies working under the table.

More importantly, if they're GST-registered businesses (which they must be if turnover exceeds $60,000), refusing to provide a GST receipt is a legal violation. Always get a proper tax invoice.

3. An Unusually Large Upfront Deposit

Standard NZ practice for residential renovation: - Small jobs (< $5,000): No deposit, or up to 20% for materials - Medium jobs ($5,000–$50,000): 10–20% deposit - Large projects: 10% deposit, then progress payments by stage

Any tradie asking for 50%+ upfront — especially for a job they haven't started — is a red flag. This is a common pattern in renovation scams: large deposit, work starts then stops, tradie becomes uncontactable.

4. They Can't Provide a Written Quote

Every legitimate tradie can produce a written quote. It doesn't need to be a formal document — even an email summary with scope and price is a starting point. If they insist on verbal only, you have no legal basis to dispute if the price changes.

"I'll know better once I start" is acceptable for genuinely uncertain scope (e.g., opening walls in an old house) but should be paired with a written hourly rate and scope description, not a blank cheque.

5. High-Pressure Sales Tactics

"This price is only good today." "I have another job starting next week, so if you want me you need to commit now." "You won't find anyone cheaper — trust me."

Legitimate tradies are busy but professional. The goal is to win the work on merit and fit your schedule. High-pressure urgency tactics are designed to prevent you from getting other quotes or checking their references.

6. No Physical Address or ABN/GST Number

A legitimate NZ-registered business will have a NZ Business Number (NZBN) searchable on the Companies Register, and a GST number if they're required to be registered. They'll have a physical address or at least be able to provide their registration details.

A mobile number only, no company name, no email address, no GST number — this is a sole trader operating without proper registration.

7. They Dismiss Permits and Inspections

"You don't need a consent for that" is sometimes correct — see Building Work Without Consent NZ. But if a tradie is telling you that clearly consented work (structural changes, new plumbing layouts, adding a bedroom) doesn't need consent, they either don't know the law or they're trying to avoid the inspection process.

Work done without required consents leaves you — the homeowner — legally exposed. When you sell, unconsented work is your problem, not the tradie's.

8. Fake or Suspiciously Generic Reviews

Online reviews are easy to fake. Warning signs of fake reviews: - All reviews posted within a short period - All 5-star, no negative reviews at all (even the best tradies get the occasional unhappy client) - Reviewer profiles with no history, or all from one location despite the tradie claiming national operation - Reviews are generic ("Great job, very professional, highly recommend") with no specific details

Cross-check on multiple platforms (Google, Builderscrack, NoCowboys) and look for reviews that describe specific jobs. Ask for direct references — names of recent clients you can call.

The Checks: How to Verify a Tradie Is Legitimate

Step 1: Verify their licence - Electrician: https://register.ewrb.govt.nz - Plumber/Gasfitter/Drainlayer: https://www.pgdb.co.nz/registration/check-registration/ - Builder (LBP): https://www.lbp.govt.nz/find-a-licensed-building-practitioner/

Step 2: Check public liability insurance Ask to see a current certificate of insurance. Legitimate contractors have public liability insurance (minimum $1–$2 million). If they can't produce it, they're uninsured — meaning if they damage your property, you may have no recourse.

Step 3: Search the Companies Register https://www.companiesoffice.govt.nz/companies/ — search by company name. Check if the company is current and active. Note the director names.

Step 4: Search Google "[Company name] complaints NZ" / "[Company name] scam" / "[Tradie name] NZ". Consumer NZ and local community Facebook groups (particularly neighbourhood groups) often have warnings about problematic operators.

Step 5: Check Builderscrack and NoCowboys Both platforms show historical reviews and ratings. A tradie with 50 jobs and 48 positive reviews has a track record. A tradie with 2 reviews is unknown.

Step 6: Call a reference For jobs over $5,000, ask for a recent reference — ideally for a similar job — and actually call them. Ask: "Was the job completed on time? Was the final cost close to the quote? Were there any issues, and how did they handle them?"

What to Do If Things Go Wrong

If the Job Is In Progress and Something Is Wrong

Stop progress payments. If you're paying in stages, don't release the next payment until you've inspected the completed stage. If the work isn't what was agreed, put your concerns in writing (email is fine) before the next payment.

If the Tradie Abandons the Job

Document everything: photographs, correspondence, invoices paid
Send a formal demand letter in writing (email and physical post) giving 14 days to complete or refund
If no response: File with the Disputes Tribunal — up to $30,000 claims, low cost ($180 filing fee), no lawyers required
For larger amounts: Consult a lawyer about the District Court

If the Work Is Substandard

For regulated trades (electrical, plumbing, gas), report to the relevant registration board. EWRB and PGDB both have complaints processes and can investigate and sanction registered practitioners — and can assist with unlicensed practitioners working illegally.

For builders: Building Practitioners Board for LBPs.

If You've Been Scammed

Report to: - Consumer Protection NZ — MBIE's consumer protection arm - Commerce Commission — if it involves deceptive conduct under the Fair Trading Act - Police — for fraud (large deposit theft with intent)

Protection Before You Start

Use a written contract for anything over $2,000. The MBIE has standard contract templates for residential building work. Key elements: agreed scope, fixed price or hourly rate, payment schedule, dispute process, completion date.

Pay by bank transfer, not cash. Cash payments are difficult to trace and prove. Bank transfers create a paper trail.

Retain 5–10% on completion. For larger jobs, hold a retention payment for 3–6 months after completion. Any defects that appear in that time should be fixed before the final payment is released.

Never sign over materials ownership. Some rogue tradies ask homeowners to sign documentation that makes materials "on site" theirs — to reclaim them if a payment dispute arises. Get legal advice before signing anything you don't understand.

Find vetted tradies: All tradespeople on NZ Tradie Tools are verified for registration and reviews. Post Your Job Free and receive quotes from registered tradies in your area.