The date changed in Parliament, not by proclamation, and that distinction matters for what happens next
Victoria’s overhaul of domestic building contracts will now start later than planned. The date by which the Domestic Building Contracts Amendment Act 2025 must be in operation has moved from 1 December 2026 to 31 March 2027, a shift of four months.
The change was made by amendment in the Legislative Council to an unrelated omnibus bill, the Consumer Legislation Amendment Bill 2026. Both Houses have now passed it. The Assembly agreed to the Council amendments on 26 August 2026. Royal Assent has not yet been recorded, so strictly the new date is not law until that happens.
For Victorian builders this is a practical reprieve rather than a reversal. The reforms are still coming. The contracts still have to change. The runway is longer.
What actually changed
The Domestic Building Contracts Amendment Act 2025 received Royal Assent on 16 September 2025. Its commencement provision works in two parts. Most of the Act comes into operation on a day or days to be proclaimed. If a provision has not been proclaimed by a set date, it comes into operation on that date automatically.
That set date was 1 December 2026. Two clauses in the Council amendment schedule change it. The first substitutes 31 March 2027 in section 2(3). The second moves the date on which the amending Act repeals itself from 1 December 2027 to 31 March 2028, keeping the two twelve months apart as originally drafted.
Nothing else about the reforms changed. The developer carve out stands. The exclusion of plans and specifications from the definition of domestic building work stands. The lift in the Major Domestic Building Contract threshold from $10,000 to $20,000 stands. So do the new rules on cost escalation clauses, cooling off, variations and termination. If you want the underlying detail on what a domestic building contract has to contain, that has not shifted. Only the clock has.
| Provision | Date as enacted | Date under the amendment |
|---|---|---|
| Forced commencement, section 2(3) | 1 December 2026 | 31 March 2027 |
| Repeal of the amending Act, section 82 | 1 December 2027 | 31 March 2028 |
| Earlier start by proclamation | Available | Still available |
| Contracts affected | Entered into on or after commencement | Unchanged |
Why a proclamation could not have done this
This is the part worth understanding, because it explains why a date change needed an Act of Parliament rather than a stroke of the Governor in Council’s pen.
A proclamation can bring a provision into operation early. It cannot push one past the date written into the Act itself. Once 1 December 2026 was in section 2(3), that was the outer limit, and the only way to move it was to amend the section. Hence a new Part inserted into a consumer omnibus bill during committee of the whole, and a specific instruction to the committee giving it power to consider amendments delaying the forced commencement date of the 2025 Act.
The consequence for builders is that 31 March 2027 is a ceiling, not a start date. Provisions can still be proclaimed earlier, and the government has previously indicated the reforms would be implemented in stages. The accurate way to plan is that the new contract rules will be in force at some point on or before 31 March 2027, and that the first tranche could land well before then.
What is a forced commencement date?
Many Australian Acts commence on a day to be proclaimed, which lets government time the start around regulations, systems and industry readiness.
To stop a proclaimed Act sitting dormant indefinitely, the Act usually names a backstop date. If a provision has not been proclaimed by then, it commences automatically on that day.
That backstop is the forced commencement date. Moving it requires amending legislation. Bringing a provision on earlier only requires a proclamation.
Why the date moved
The parliamentary record does not state a reason, and it would be wrong to invent one. What can be said is what else was happening on the same timeline.
The regulations that make large parts of the scheme workable went out for public consultation on 18 August 2026, with submissions closing on 16 September 2026. Those are the draft rules that lift the deposit limit and fix the payment schedule, and they also prescribe the forms of modern methods of construction and how deposit limits scale with offsite content.
Under the old date, consultation would have closed roughly ten weeks before commencement. In that window the department would have had to consider submissions, finalise the regulations, take them through the Governor in Council and gazette them, and industry would have had to redraft and reprint contracts off the back of them. Under the new date there are about six months. That is a materially different proposition for everyone involved.
There is also an election in Victoria in late November 2026, which compresses the parliamentary and administrative calendar either side of the original date.
The four months are not spare time
The temptation with any deferral is to put the file down. That would be a mistake here, for one specific reason: the new rules apply to contracts entered into on or after commencement, not to contracts already on foot.
That cutoff creates a hard changeover. Every contract signed before the switch runs under the current framework for its whole life. Every contract signed after it runs under the new one. A builder with a pipeline straddling the date will be administering two sets of rules side by side for as long as the older jobs run, which on a custom home can be well over a year.
The work that pays off now is unglamorous. Identify which contract templates you use and who supplies them. Ask that supplier when their updated versions will be available and whether they will be issued before or after the regulations are finalised. Map your quoting and sales process against the changeover, because a quote issued in February on old terms and signed in April creates a problem that is much cheaper to prevent than to fix. And treat this as part of the compliance obligations that sit behind a build rather than as a paperwork job to be done in the last fortnight.
Builders working across state lines have an additional wrinkle. Victoria’s changeover date now sits in the same quarter as several other reform milestones in other jurisdictions, and none of them are aligned.
The bill carries more than a date
The same set of Council amendments does considerably more than move a deadline, and some of it matters more to builders than the deferral does.
A new Part 2A goes into the Building Act 1993 regulating prefabrication work and prefabrication builders as a distinct category, with registration, mandatory documentation and certification requirements attaching to prefabricated building systems, obligations on building surveyors at both permit and occupancy permit stage, and civil penalty provisions running to 500 penalty units for an individual and 2,500 for a body corporate. There is a new notification and design certification regime for complex plumbing work, and a set of exceptions to the developer bond requirement.
The bill also contains the provisions making undocumented variations a criminal offence, including a requirement that certain agreements varying a domestic building contract be in writing and legible.
The prefabrication provisions in particular are worth separate attention. Victoria has not previously regulated prefabrication work as its own category with its own registration class, and the obligations land on manufacturers, on the builders who install their product, and on the surveyors who have to see the paperwork before issuing a permit.
The Good Builder Take
Four months is enough to be useful and not enough to be complacent.
The thing to watch is not 31 March 2027. It is the proclamation notices between now and then, because the reforms were always going to arrive in stages and the ceiling moving does not tell you when the first stage lands.
The other thing to watch is your contract supplier. Most builders will not read the regulations. They will use whatever template arrives in the post or the portal. If that template arrives late, the deferral will have bought the industry time it did not actually get to use.
What is still unsettled
- Royal Assent has not been recorded. Until it is, the current forced commencement date remains 1 December 2026 in law.
- The regulations are not made. Consultation closes on 16 September 2026 and the final form is not yet known.
- No commencement schedule has been published for the staged rollout, so which provisions start first, and when, is still open.
- The prefabrication and complex plumbing provisions in the omnibus bill have their own commencement arrangements, several of which run to dates in 2027 that are separate from the domestic building contract timeline.
Where this leaves builders
The headline is simple enough. Victoria’s domestic building contract reforms will now be in force no later than 31 March 2027 instead of 1 December 2026, subject to assent, and could arrive in parts before then.
The more useful read is that the state has quietly acknowledged that the original timeline did not work once the regulations went out for consultation. That is a reasonable thing for a government to do. It is also a reminder that commencement dates in a reform program of this size are estimates until they are proclaimed, and that the businesses which cope best are the ones treating the changeover as a process to be managed rather than a date to be waited for.
Four months is not a lot of time to rebuild the paperwork underneath a construction business. It is considerably more than ten weeks.
Frequently asked questions
Under the amendment that has passed both Houses of the Victorian Parliament, the Domestic Building Contracts Amendment Act 2025 must be in operation no later than 31 March 2027, moved from 1 December 2026. Provisions can be brought into operation earlier by proclamation, and the government has indicated the reforms will be implemented in stages, so parts of the scheme may start before that date. Royal Assent to the amending bill had not been recorded at the time of writing.
No. The reforms apply to domestic building contracts entered into on or after commencement. Contracts signed before that date continue to be governed by the current framework for the life of the job. This means builders with work in progress across the changeover will be administering two sets of contract rules at the same time.
Not yet, and doing so early carries its own risk because the regulations that sit under the Act are still in consultation and their final form is not settled. The useful step now is to confirm with your contract supplier when compliant templates will be available, and to check whether your quoting and sales cycle could see a quote issued under the old rules and signed under the new ones
Because the date was written into the Act. Section 2(3) of the Domestic Building Contracts Amendment Act 2025 set 1 December 2026 as the day on which any unproclaimed provision would commence automatically. A proclamation can bring provisions on earlier but cannot push them past a date fixed in the Act, so moving it required amending legislation. That was done through the Consumer Legislation Amendment Bill 2026.
A good deal. The same Council amendments insert a new Part into the Building Act 1993 regulating prefabrication work and prefabrication builders as a distinct category with registration and certification requirements, create a notification and design certification regime for complex plumbing work, add exceptions to the developer bond requirement, and include provisions requiring certain variations to a domestic building contract to be documented in writing.
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Last updated: 28 August 2026.
This article contains general information only. It reflects the position at the date of publication and does not take account of any particular business, contract or circumstance. Legislation and regulations referred to here may change. Readers should obtain their own professional guidance before acting on anything set out above
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