Short answer
A compliance certificate is a licensed tradesperson's formal statement that specified work meets the applicable standard. Electrical, plumbing and gas work generally require one, issued by the licensed person who did the work and given to you. It is not optional paperwork — it is often the only proof the work was ever done lawfully.
Most people first hear about compliance certificates when they are selling a house and someone asks for one they never received. It is a bad moment to learn what they are.
What the certificate actually is
It is a declaration by the licensed person who performed the work that the work complies with the relevant standards and regulations. It identifies the licence holder, the property, and the work done. The names differ between states and between trades — certificate of electrical safety, certificate of compliance, compliance certificate — and the function is the same.
When you should expect one
- Electrical work — new circuits, switchboard work, rewiring, and in many jurisdictions a far wider range of work than people assume.
- Plumbing work that connects to or alters the water, sewer or stormwater system.
- Gas fitting, which is licensed separately from plumbing and is the one people most often assume is covered when it is not.
- Some air conditioning installation, because it involves both electrical work and refrigerant handling.
Why it matters later
- Selling. Buyers and conveyancers ask, and unevidenced work can hold up or complicate a sale.
- Insurance. If unlawfully performed work causes damage, an absent certificate makes an already difficult claim considerably worse.
- Proof of who did it. If a defect emerges in three years, the certificate names the licence holder responsible.
- Future work. The next tradesperson wants to know what was done and to what standard, and the certificate is the record.
If you never received one
Ask the tradesperson in writing. Most will issue it — it is often simply an administrative oversight. If they will not, or cannot because the work was done by someone unlicensed, that is a matter for your state regulator, and it is worth raising: an unlicensed connection to a gas or electrical system is a safety issue rather than a paperwork one.
Common questions
- Who issues a compliance certificate?
- The licensed tradesperson who performed the work. It cannot be issued by an unlicensed person or by someone who did not do the work, which is the whole point of it — it ties a named licence holder to a specific job.
- Does all electrical work need a certificate?
- The scope varies by state and it is generally wider than people expect. Rather than guessing, ask before the job starts whether this work requires one — a licensed electrician will know immediately, and the answer becomes part of what you agreed.
- What if the work was done years ago and I have no certificate?
- Some jurisdictions hold records with the regulator or the network distributor and can confirm work was certified. Where nothing exists, a licensed inspection can assess the current state of the work, which is not the same as a retrospective certificate but is what a buyer or an insurer will realistically want to see.
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