When a licence is needed, and when it is not
| The work | Licence needed? | The line |
|---|---|---|
| Residential building work — a house, a duplex, units up to three storeys, an extension that adds floor area | Yes | Worth more than $25,000. That makes it prescribed work |
| The same work at $25,000 or less | No registration required | Unless part of it is electrical or plumbing, below |
| A retaining wall a house depends on for its integrity | Yes | Whenever it is built, as part of prescribed work |
| Relocating an existing building | Yes | Named in the prescribed-work list |
| Electrical work | Yes | Any value. Must be a licensed electrical contractor |
| Plumbing and draining | Yes | Any value. Only an advanced tradesman licence holder may contract for and carry it out |
| Commercial building work — class 1b, classes 3 to 9 | Yes | Commercial registration, required since 15 April 2025 |
Sources: NT Government, What is prescribed residential building work, and the Building Practitioners Board scope-of-works table, both read 3 September 2026.
The $25,000 figure is new, and half the internet still says $12,000
If you have read anywhere that the Territory’s line is $12,000, that was true and is not any more. Reforms commencing 30 March 2026 raised it, and the NT Government says so plainly: the amendments increase “the minimum prescribed value that triggers the need of a fidelity certificate from $12,000 to $25,000”.
There is a catch worth knowing if your job started earlier. The change applies only to fidelity certificates issued after 30 March 2026. A certificate issued before that date is governed by the rules it was issued under, because applying the change backwards would alter cover people already hold.
Source: NT Government, Fidelity fund certificate, read 3 September 2026.
Which builder registration your job needs
The Building Practitioners Board registers builders by what they may build, not by what they charge. For a house, there are two categories and the difference is height.
| Category | What it covers |
|---|---|
| Building Contractor Residential (Restricted) | A class 1a detached house; a class 1a attached dwelling or class 2 building of one or two storeys; an attached class 10 built at the same time; a retaining wall the building depends on. Work valued $25,000 or above |
| Building Contractor Residential (Unrestricted) | The same list, but a class 1a attached dwelling or class 2 building of any height. Work valued $25,000 or above |
| Building Contractor Commercial (Restricted or Unrestricted) | Class 1b and classes 3 to 9 — restricted stops at three storeys, unrestricted does not |
| Building Certifier (Residential or Unrestricted) | Issues the building permits and occupancy permits. Residential covers class 1 and class 10 only |
So if you are putting up anything of three storeys or more, the NT Government says you must employ a building contractor residential (unrestricted). Ask which of the two your builder holds before that matters rather than after.
The Board also registers the people who sign the work off: certifying engineers for structural, mechanical and hydraulic work, certifying plumbers and drainers, and certifying architects. Those are separate registrations again.
Electrical work has a trap the other states do not
NT WorkSafe draws a line most homeowners have never heard of, and it decides whether the person invoicing you is allowed to.
- A licensed electrical worker is a qualified electrician. NT WorkSafe says one “must be employed by someone else and is not allowed to work for themselves or invoice a customer”.
- A licensed electrical contractor is the business. Only a contractor may take your job, and only a contractor can issue an electrical certificate of compliance — which NT WorkSafe describes as your warranty that the work is to standard and safe.
So a sparky who is licensed as a worker but not as a contractor cannot legally bill you for the job. If someone offers you a private cash rate on the side, that is the arrangement they are describing, and NT WorkSafe is blunt about it: “It is illegal for you to do your own electrical work if you’re unlicensed or to offer a licensed electrical worker cash to do a job.”
Source: NT WorkSafe, Find a licensed electrical contractor, read 3 September 2026.
Plumbing: one licence to do it, a different one to sign it off
The Plumbers and Drainers Licensing Board is direct about who may take your plumbing job. In the NT, “only a plumber who holds an advanced tradesman licence issued by the Board may contract for and carry out plumbing and draining work”. There is no dollar figure attached to that.
An advanced tradesman may supervise apprentices, registered journeymen and trades assistants — but cannot certify the work. Certifying needs a separate registration as a certifying plumber and drainer, held with the Building Practitioners Board, so on a job that needs signing off you may be dealing with two registrations and possibly two people.
One honest limit: the Act applies to declared plumbing licence areas, which are set out in the Board’s own determination rather than being territory-wide by default. If your place is remote, that is a question for the Board on 1800 193 111 rather than for us.
Source: NT Plumbers and Drainers Licensing Board, Licensing, read 3 September 2026.
Check the register before the work starts
The NT keeps three separate registers, one per regulator, so you may need more than one for a single job.
- Builders, certifiers and certifying engineers — the Public Register of Building Practitioners.
- Electrical contractors — the NT Government’s electrical contractor licence check.
- Plumbers and drainers — the licensed list on the Plumbers and Drainers Licensing Board site. If a name is missing, the Board asks you to ring 1800 193 111 rather than assume.
We have a walk-through of how to search every state’s register: how to check a tradie’s licence yourself.
Owner builders: what it means when the “builder” is the owner
In the NT an owner builder certificate is required for work on your own home valued over $25,000, and it comes with real limits. Duplexes, townhouses, flats and units cannot be built, extended or renovated by an owner builder at all. A certificate covers one block for three years, renewable once, and you must wait six years from the issue of the last one before taking another property on.
The NT Government’s own warning is worth reading twice if somebody suggests you take this route: “A builder who recommends you become an owner builder while they act as project manager, may be avoiding legal responsibilities or be unregistered.” As an owner builder you carry the builder’s legal responsibilities, including rectifying defective work for up to six years if you sell.
Source: NT Government, Get an owner builder certificate, read 3 September 2026.
What the fidelity fund certificate actually covers
The NT’s equivalent of home warranty insurance is a fidelity fund certificate, and its trigger is narrower than people expect. It pays out only if your builder becomes bankrupt, dies, disappears, or has their registration cancelled by the Building Practitioners Board. Then it covers the cost of moving to a new builder, non-structural defects for the first year, and structural defects for six years.
If your builder is alive, solvent and still registered but the work is bad, the fidelity fund is not your door. The Commissioner for Residential Building Disputes is.
Three questions worth asking before you say yes
- “Is this job over $25,000, and are you registered as a residential building contractor?” If it is over the line and they are not registered, that is the end of the conversation.
- “Are you a licensed electrical contractor, or a licensed electrical worker?” Only the first may invoice you and issue a certificate of compliance.
- “Who is certifying the plumbing?” The plumber doing the work is often not the person registered to certify it. Get both names.
This page explains the Northern Territory’s published licensing and registration rules. It is general information, not legal advice, and it is not a licence check. Yamate does not issue, assess, endorse or certify any licence or registration, and we do not decide whether one is required for your job — the Building Practitioners Board, NT WorkSafe and the Plumbers and Drainers Licensing Board do, and no regulator has reviewed this page. Every figure above was read at an NT Government page on 3 September 2026 and is linked beside the claim; the $25,000 threshold changed on 30 March 2026 and rules change again, so check the date on this page against theirs. Northern Territory only — none of this applies anywhere else.