Force Majeure in Australian Residential Building Contracts

What it is

Force majeure is a contractual mechanism that excuses or suspends performance when defined extraordinary events stop a party doing what the contract requires. In Australia, force majeure has no settled common law meaning. It only exists in a contract if the contract says so, and only operates the way the contract defines.

That is the single most important point about force majeure in AU residential building work. If your contract is silent, force majeure is not implied. The only fallback is the common law doctrine of frustration, which has a much narrower scope and ends the contract rather than suspending it.

Why this matters for residential builders

Standard AU residential templates have historically been thin on force majeure. HIA, Master Builders, Fair Trading and QBCC contracts often handle weather and similar disruptions through extension of time clauses rather than a dedicated force majeure clause. That works for ordinary site disruption. It struggles when something genuinely systemic happens.

COVID-19 made that gap visible. State public health orders, border closures and labour shortages stopped or slowed thousands of residential jobs. Many builders looked at their contracts and found no force majeure clause at all, or one that did not clearly capture a pandemic. The fallback options were extension of time clauses for delay and frustration to end the contract entirely. Neither was a clean fit.

What a force majeure clause typically covers

A working clause has three jobs.

Define the triggering events

The list usually covers acts of God, natural disasters, war, civil unrest, government action, industrial action and epidemics or pandemics. Generic catch-all wording such as any event beyond the reasonable control of a party adds flexibility but is interpreted narrowly by courts. Specific listed events are more reliable.

Set the conditions

The party affected must usually show the event was outside its reasonable control, could not have been prevented or mitigated, and actually caused the failure to perform. Notice obligations apply, often within a few business days of the event.

State the consequences

Performance is suspended for the duration of the event. Once suspended performance has run for a defined period, often 30 to 90 days, either party may have a right to terminate. Some clauses also entitle the affected party to time relief and limited cost relief.

Force majeure and frustration

Where a contract has no force majeure clause, the common law doctrine of frustration may apply. A contract is frustrated where a post-formation event makes performance impossible or radically different from what was agreed and is not the fault of either party. The effect is to discharge the contract from the date of frustration. Past performance and payments are dealt with under state Frustrated Contracts Acts in some jurisdictions and at common law in others.

Frustration sets a high bar. Australian courts have consistently held that construction delay, material shortages or skilled labour shortages are inherent risks of building and rarely frustrate a contract. Cost increases alone, even significant ones, do not frustrate the contract because parties are taken to have accepted commercial risk.

Where a contract does include a force majeure clause, the clause usually displaces frustration for events the clause covers. The parties are taken to have allocated risk for those events themselves.

COVID lessons for residential building

Three practical lessons emerged from the COVID period for AU residential builders.

Pandemics belong in the list

Builders without an express pandemic or epidemic trigger had to argue under generic wording or rely on extension of time clauses for inclement weather and authority delays. Many of those clauses were never written with a public health order in mind. A specific pandemic trigger removes the argument.

Material shortages need their own treatment

Timber, steel and roof tile shortages caused real delay during 2021 and 2022. Generic force majeure rarely covers supply chain shortages because they are seen as foreseeable. Builders who want time relief for material shortages need a specific clause, usually within the EOT regime.

Cost shifts need a separate mechanism

Force majeure clauses suspend performance. They rarely shift price. Builders exposed to cost escalation need a rise and fall clause, a price review trigger or a fixed window before contract price escalation rights kick in. State protections such as VIC section 41 of the Domestic Building Contracts Act 1995 give owners a right to end the contract if the price rises by 15 per cent or more for reasons outside the contract, which itself is an outcome no builder wants.

What a builder should check

For any AU residential project running on a standard template, three things are worth checking before signing.

Is there a force majeure clause at all

Many older HIA and Master Builders templates do not include one. The 2021 and later editions are better but still vary by state.

Does it include pandemic, epidemic and government action

If not, the next pandemic will be argued the same way the last one was.

What is the termination trigger

A clause that allows either party to terminate after 60 or 90 days of suspended performance gives both sides a clean exit. Without it, the project can hang indefinitely while the dispute sits.

Where to get the words right

If the standard template does not include adequate force majeure, the right answer is a special condition drafted by a construction lawyer. Generic clauses pulled from commercial contracts often do not sit cleanly inside the residential consumer protection framework, particularly the implied warranties under the NSW Home Building Act 1989, the VIC Domestic Building Contracts Act 1995 and the QBCC Act schedule 1B.