Misleading quotes for residential builders: state by state comparison

Key takeaways

• Every quote from a residential builder sits under ACL section 18, and the overall-impression test applies regardless of the state.
• Six jurisdictions layer state-specific quote-content rules on top of the ACL. Only WA and NT rely primarily on the ACL without a state-specific estimated-price section.
• Cooling-off period after signing varies: 5 business days in NSW, VIC and QLD; nil in WA; state-specific in others.
• Provisional sum and prime cost disclosures are treated as advertising conduct in Victoria and South Australia under state Acts.
• Regulator preference for enforcement runs through the state fair trading body first, with the ACCC as the federal fallback for large-scale conduct.

The ACL baseline

Every advertised quote or estimate sits under section 18 of the ACL, which bans conduct that is misleading or deceptive or is likely to mislead. The test is objective. Intent is not required. The audience is the target consumer.

Section 29(1)(i) adds a specific ban on false or misleading representations about price, and section 48 covers component pricing rules. Between them, these three ACL provisions catch most quote-related mischief.

The state layer

On top of the ACL, each jurisdiction adds its own rules:

• NSW. Home Building Act 1989 section 19 requires licence-display; the Act does not add a specific estimated-price rule but Fair Trading NSW applies the ACL rigorously.
• VIC. DBCA section 31 sets a specific genuine-estimate rule for major domestic building contracts.
• QLD. Schedule 1B of the QBCC Act 1991 governs regulated residential contracts and adds pricing content rules; QBCC audit patterns cover quotes.
• WA. HBCA sets contract content but has no separate estimated-price provision; Consumer Protection WA relies on ACL section 18.
• SA. BWC Act 1995 sets provisional sum and prime cost disclosure rules for domestic building contracts.
• TAS. Residential Building Work Contracts and Dispute Resolution Act 2016 sets progress payment and cooling-off rules that interact with quote content.
• ACT. Building Act 2004 sets contract content; Access Canberra enforces the ACL.
• NT. Building Act 1993 sets registration; NT Consumer Affairs applies the ACL for quote conduct.

Cooling-off comparison

Jurisdiction	Cooling-off	Statute
NSW	5 business days	Home Building Act 1989 s 7BA
VIC	5 business days	DBCA s 34
QLD	5 business days	QBCC Act Schedule 1B
WA	None	Home Building Contracts Act 1991
SA	5 business days	BWC Act 1995
TAS	Cooling-off under 2016 Act	Residential Building Work Act 2016
ACT	5 business days	Building Act 2004
NT	State-specific	Building Act 1993

Practical takeaways

A quote template used unchanged across states will contain wrong cooling-off text in at least one jurisdiction. WA in particular carries no statutory cooling-off, and the risk runs both ways: a WA template used interstate omits protections the eastern-state consumer expects.

Provisional sum and prime cost items are enforced against advertising as well as contracts in Victoria and South Australia. Marketing that trails a "from $X" price and hides material provisional sums risks a section 18 finding in all states.

Enforcement pathway

Complaints run through the state consumer regulator first. Fair Trading NSW, Consumer Affairs Victoria, the Office of Fair Trading (Qld), Consumer Protection WA, CBS SA, CBOS Tasmania, Access Canberra and NT Consumer Affairs each handle first-level enforcement. The ACCC steps in for large-scale or cross-jurisdictional conduct.