Suspension of Work Under the SOP Act: Must You Assess Liquidated Damages in NSW?

Key Takeaways

• Contractors holding a valid statutory right to suspend under the Building and Construction Industry Security of Payment Act 1999 (NSW) (SOP Act) are statutorily immune from delay damages for that period.

• Superintendents may face significant professional exposure if they capitulate to a principal’s demand to certify liquidated damages against a contractor who has lawfully suspended work for non-payment.

• Superintendents directing suspension of building works (commonly class 2 projects) may, where their role involves supervising, coordinating, project managing or substantive control under section 36, enliven a personal statutory duty of care under section 37 of the Design and Building Practitioners Act 2020 (NSW) (DBPA)—a duty that section 39 provides must not be delegated—if latent defects result.

• If a principal pursues the consultancy for pure economic loss following a disputed EOT assessment, the superintendent can typically rely on the proportionate liability framework under the Civil Liability Act 2002 (NSW) (CLA) to limit exposure on that claim, as distinct from DBPA Part 4 defects liability.

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The concrete pours were scheduled for Tuesday, but the gates are locked. The contractor’s project manager has emailed a single line stating they have suspended works for non-payment. Ten minutes later, the principal calls, demanding you immediately issue a show cause notice under the contract for failure to proceed with due expedition and assess liquidated damages for every day the site sits idle. You are now caught in the crossfire between a potential statutory suspension and a furious client demanding aggressive contractual enforcement.

If you cave to the principal and incorrectly certify delay damages against a valid statutory suspension, you risk opening your consultancy to a negligent certification claim. Conversely, if you refuse the principal’s directive without a documented legal basis, you risk breaching your engagement agreement.

This article outlines the precise sequence New South Wales superintendents must follow to assess EOTs and delay costs impartially in this high-pressure grey zone, without risking the viability of their practice. It walks through the crisis in the order you will actually face it: the first 48 hours, the liquidated damages fight, the hidden risk buried in your own suspension directions, and the negligence claim that can arrive months later.

Triage Strategy for the First 48 Hours After a Contractor Stops Work

You are facing intense pressure from the principal to pull the contractual trigger immediately, but a misstep here can be catastrophic for your consultancy. At this stage, your priority is establishing the precise legal character of the contractor's suspension of work, gathering the paper trail, and buying time before you certify any delay against them or advise the principal on their termination rights. Before you do anything else, ask one question: was payment made, and was a notice of intention to suspend served? Almost every misstep in the sections that follow traces back to that question being skipped.

Securing the Contractor’s Written Notice Before Assessing EOT Entitlements

To impartially assess any subsequent EOT claims, you must first obtain a copy of the specific written notice the contractor served on the principal. Under the SOP Act, a contractor cannot validly suspend work without first serving written notice of intention to suspend under section 15, 16 or 24 (which must state that it is made under the Act) and allowing at least two business days to pass after that notice before suspending under section 27(1). Without sighting this document, you cannot determine if the contractor is lawfully exercising payment rights under the SOP Act or simply abandoning the site. Reviewing construction law publications can provide a baseline for understanding these mechanisms, but obtaining the actual notice served on the principal is an essential first step.

Separating Statutory SOPA Suspension from Common Law Repudiation and Contractual Rights

When a contractor stops work, their action falls into one of three distinct legal categories: an overriding statutory right, a contractual right, or a common law repudiation. Standard-form contracts rarely grant the contractor a reciprocal right to suspend for non-payment, meaning their purely contractual rights are usually non-existent. A common law repudiation occurs if the contractor unlawfully abandons the site without a legal basis, allowing the principal to terminate. However, the statutory mechanism operates entirely outside the construction contract.

Under NSW law, a contractor's statutory right to suspend works for non-payment under the SOP Act overrides any absence of a reciprocal suspension right in the underlying construction contract. Section 34 of the SOP Act confirms that the Act has effect despite any contrary contractual provision, and that attempts to exclude, modify or restrict its operation are void.

Because this statutory avenue bypasses standard contractual mechanisms entirely, separating it from contractual abandonment is the most critical doctrinal distinction a superintendent must make.

The Superintendent’s Immediate Action Sequence to Prevent Certification Paralysis

To maintain your superintendent impartiality obligation while the site is stalled and the principal is demanding action, follow this immediate sequence:

• Request a copy of the SOPA notice from the principal to confirm it was formally served under section 15, 16 or 24 and states that it is made under the Act.

• Verify that at least two business days have passed between service of that notice and the work stoppage, as required by section 27(1).

• Log the exact suspension start date in the site diary to baseline future delay and EOT calculations.

• Freeze pending delay cost assessments until the legal validity of the suspension is conclusively resolved by the parties.

Why Advising the Principal to Issue a Show Cause Notice Can Constitute Negligent Administration

Superintendents who misinterpret a valid statutory suspension as a failure to proceed with due expedition may expose their consultancy to liability. If you advise the principal to issue a show cause notice while the contractor is lawfully suspended under section 27(1) of the SOP Act—which provides that a claimant may suspend the carrying out of construction work if at least 2 business days have passed since notice of intention to do so was given under section 15, 16 or 24—that advice is likely to be fundamentally flawed.

This misstep can trigger a chain of events where the principal wrongfully repudiates the contract, potentially exposing the superintendent to claims from the principal for negligent administration.

The trap is baked into the architecture of the standard forms themselves. Under AS 4000, the Superintendent is handed an express power to direct the Contractor to suspend the whole or part of the works, but the contract grants the Contractor no reciprocal right to down tools for non-payment. A Superintendent who has spent a career reading suspension exclusively as a principal-side lever tends to reach reflexively for the clause 39.2 substantial breach provisions—wrongful suspension of work, or failure to proceed with due expedition and without delay—the moment the site goes quiet, because that is the only suspension framework the contract itself puts in front of them. The statutory right sits entirely outside the printed pages, so it is invisible to anyone administering the job by reference to the contract alone.

In practice, the misidentification usually surfaces in one of two ways: the Superintendent certifies a delay against the Contractor's programme without first asking whether a s 27 notice was served, or the Superintendent drafts a show cause notice at the principal's direction and never interrogates why the Contractor stopped in the first place.

Both are avoidable with a single question at the outset—was payment made, and was a notice of intention to suspend served—but that question is routinely skipped when a client is applying pressure and the contract appears, on its face, to supply a ready answer.

Administering Liquidated Damages When the Principal Refuses to Recognise a SOPA Suspension

At this point, the principal is flatly rejecting the contractor's right to suspend and is actively directing you to deduct liquidated damages from the next payment certificate. You are now trapped between the principal’s commercial demands and your contractual obligation to certify impartially. This section details the statutory mechanism you must rely on to push back against unlawful directives and protect your position.

Section 27(3) Immunity Nullifies the Principal’s Entitlement to Delay Damages

If a contractor validly exercises their statutory right to suspend, they are statutorily not liable for loss or damage suffered by the principal as a consequence of the contractor not carrying out the work during the suspension. This immunity operates via Section 27(3) of the SOP Act, which states: "A claimant who suspends construction work... is not liable for any loss or damage suffered by the respondent..." This completely neutralises the principal's contractual entitlement to levy liquidated damages for the delay period caused by the suspension. Where a payment dispute of this kind escalates, a security of payment lawyer can advise on the strict notice and adjudication mechanics that determine whether the immunity holds.

However, the effectiveness of this statutory immunity depends entirely on whether the contractor strictly complied with the limiting notice provisions under s 27; if their notice was defective, the immunity falls away, which alters your certification duties entirely and raises the prospect of a negligent certification claim against you.

The Legal Consequence of Certifying LDs Against a Valid Statutory Suspension

Warning: If a superintendent knowingly certifies liquidated damages against a contractor who is enjoying statutory SOPA immunity, they may breach their obligation to certify reasonably and in good faith (and, more broadly, to exercise certifier functions fairly). A court or tribunal is likely to treat such a certification as unsound, and the deduction may be reversed through the contract’s dispute process or in subsequent proceedings. In a Security of Payment adjudication, the absence of any underlying entitlement to those liquidated damages will also undermine the certified deduction. Beyond invalidating the certificate, capitulating to the principal's demand can open the consultancy to direct claims for breach of the engagement agreement or professional negligence, which is why early consultation with NSW building and construction lawyers is often necessary to navigate the pressure.

Documenting Your Impartial Refusal to Certify Deductions Under Principal Pressure

When a principal directs you to ignore a statutory suspension, a verbal refusal is insufficient; you must formally document your position. The superintendent should rely on written records referencing the statutory framework, recent legislative updates like the Building and Construction Industry Security of Payment Amendment Act 2018 (NSW) which streamlined the claims process, and the limits of their contractual powers to demonstrate they are acting reasonably. The refusal is substantiated by section 27(3) itself: if the suspension is valid, there is no loss-based entitlement to support a liquidated damages deduction for that period.

A superintendent demonstrates compliance with their impartiality obligation by formally documenting in writing that a valid statutory suspension under the NSW SOP Act legally precludes the certification of liquidated damages.

Superintendent-Directed Suspensions and the Design and Building Practitioners Act 2020 (NSW) Risk

So far we have assumed the contractor downed tools. The risk profile flips entirely when the suspension is your own direction. Instead of the contractor walking off, you have just issued a superintendent's direction to suspend works due to a major dispute or design failure. You now have a dormant class 2 site exposed to the elements, and the clock is ticking on potential latent defect liabilities under Part 4—including, where an individual superintendent had substantive control, personal exposure of the kind illustrated in the recent control cases. This section explains how your administrative direction to halt work can trigger long-term statutory liability, and what defensive project management steps you must take immediately.

How the Superintendent’s Direction to Suspend Can Trigger the Section 37 Statutory Duty of Care

Actively directing a suspension on a building—often a class 2 project mid-envelope— brings the superintendent's actions squarely into the realm of the DBPA. Under section 36(1)(d), construction work includes supervising, coordinating, project managing or otherwise having substantive control over building work. By exercising that kind of function when halting progress, the superintendent may be a person who "carries out construction work", potentially enlivening the personal statutory duty in section 37(1), which states: "A person who carries out construction work has a duty to exercise reasonable care to avoid economic loss caused by defects..." Section 39 then provides that a person who owes a duty of care under Part 4 is not entitled to delegate that duty. The interaction between sections 36, 37 and 39 means that the decision to suspend is not merely a contractual lever, but a potential catalyst for personal liability.

Latent Defect Exposure When Suspended Class 2 Sites Are Left Exposed to Weather

If you halt a project without concurrently directing adequate weatherproofing or site preservation, you significantly increase your long-term liability. Water ingress during a dormant period can cause latent defects that only manifest years after practical completion. This failure to secure the site may form the factual basis for a claim that the superintendent breached their personal statutory duty of care under DBPA s 37, potentially leading to claims for pure economic loss from future owners.

The exposure is at its sharpest when a site is stopped mid-envelope. A suspension directed after the slab and frame are up but before the roof membrane, window flashings, or external wall waterproofing are complete leaves the most vulnerable elements of a class 2 building open to the weather for the duration of the stoppage. The defects that follow are precisely the kind that stay hidden: moisture tracking behind partially installed cladding, saturated framing and insulation that is later sheeted over, corrosion at connections, and slab moisture that only reads as efflorescence or delamination in the finished floor months later. Because these manifest well after occupation, they surface as owners corporation claims years down the track, by which time the Contractor may have deregistered and the Superintendent is the solvent target left standing.

The directions that get missed are mundane, and that is exactly why they get missed:

• No direction to tarp exposed openings.

• No requirement to maintain dewatering or keep drainage paths clear.

• No interim inspection regime to confirm the make-safe measures are actually holding through the stoppage.

A Superintendent who directs the suspension but treats site preservation as the Contractor's problem to sort out has, in practice, left the single most defensible mitigation step on the table.

Issuing Site Preservation Instructions During the Suspension of Work

Whenever a superintendent directs a suspension on a building—especially a class 2 project mid-envelope—they must simultaneously issue clear, documented instructions regarding site make-safe and weather-tightness. This procedural mitigation step helps quarantine their personal liability by establishing that they exercised reasonable care to prevent defects from arising during the work stoppage.

To mitigate personal liability under the DBPA, superintendents directing a suspension of works—particularly on class 2 and other envelope-sensitive buildings—must issue concurrent, documented instructions ensuring the site is weather-tight and preserved against latent defects.

Defending the Consultancy Against the Principal’s Economic Loss Claim for Negligent Assessment

The suspension is over, the project is severely delayed, and the principal is now seeking to recover their unlevied liquidated damages by suing your consultancy directly for negligent assessment. You need to know how the statutory apportionment framework protects your practice when multiple parties contributed to the project’s delay, shielding your commercial viability and your professional indemnity insurance.

Why Exclusion Clauses Won’t Stop the Principal Pursuing the Superintendent for Unrecovered LDs

Limitation of liability clauses in the superintendent’s engagement agreement are designed to cap the consultancy's financial exposure to the principal in the event of a dispute. However, the enforceability of this clause depends heavily on how the principal pleads their claim; principals frequently attempt to bypass these contractual caps by framing a disputed EOT assessment during a suspension as a breach of professional negligence in tort, which may pierce standard contractual protections. Aggressive claims for pure economic loss can rapidly escalate into separate exposure channels that sit entirely outside the contract, particularly where the principal pleads a tortious duty independent of the retainer.

In practice, the pleading rarely mentions the engagement agreement at all until the reply. A principal advised properly will frame the statement of claim in the tort of negligence from the first paragraph, plead the duty of care as arising independently of the retainer, and quantify the loss as the unrecovered liquidated damages plus consequential delay costs rather than as damages for breach of contract.

The tactical purpose is to keep the claim outside the four corners of the engagement so that the liability cap—expressed to apply to claims "under this agreement" or "arising out of the services"—has nothing to attach to. Superintendents are frequently caught out because their engagement caps are drafted narrowly against contractual breach and say nothing about concurrent claims in tort, and because the cap is often expressed as a multiple of fees on a job where the fees were modest but the delay exposure runs to seven figures.

The practical lesson is that the strength of your position turns less on the existence of a cap and more on whether the retainer expressly extends the cap to liability "however arising, whether in contract, tort or otherwise," and whether that extension survives on the facts pleaded.

Evidentiary Requirements to Establish Concurrent Delay During Suspension

When a statutory suspension overlaps with a principal-caused delay, assessing the true cause of the project's late completion becomes highly complex. Accurate, contemporaneous site records are the primary evidence a superintendent can rely on to prove that the delay loss was not solely caused by their certification decisions. This is why meticulous record-keeping today matters: those records are the raw material for a proportionate liability defence you may not need to run for another two years. Establishing this evidentiary baseline is a necessary step before a proportionate liability defence can be successfully mounted, as it demonstrates that multiple parties contributed to the delay.

Pleading Proportionate Liability Under Section 35 of the Civil Liability Act 2002 (NSW)

If a principal sues for pure economic loss resulting from an allegedly negligent assessment during a suspension, the superintendent's primary procedural defence is the proportionate liability framework. Section 35(1) of the CLA provides that "the liability of a defendant who is a concurrent wrongdoer in relation to that claim is limited to an amount reflecting that proportion of the damage or loss claimed that the court considers just having regard to the extent of the defendant’s responsibility for the damage or loss". This means a superintendent's liability may be limited to their proportionate share of responsibility for the economic loss.

Under section 35 of the CLA, a superintendent sued by a principal for economic loss arising from a disputed delay assessment can limit their liability to their proportionate share of responsibility as a concurrent wrongdoer. That proportionate liability analysis is directed to the principal’s negligent-assessment claim. It should not be assumed to reduce liability in the same way where the superintendent is sued as a duty-holder for breach of the non-delegable statutory duty under sections 37 and 39 of the DBPA; after the High Court's 4:3 decision in Pafburn Pty Ltd v The Owners – Strata Plan No 84674 [2024] HCA 49, a person found to owe the Part 4 statutory duty will generally be unable to apportion liability to those to whom construction work was delegated or entrusted.

Because invoking this defence requires strategic pleading against both the principal and the contractor, engaging an experienced NSW commercial lawyer early is typically essential to assess the claim. Superintendents navigating these complex multi-party disputes often contact Merlo Law to formally evaluate their concurrent wrongdoer status.

Conclusion

When the concrete trucks are turned away and the site gates are locked, a superintendent's immediate reaction dictates their long-term liability. The principal’s demand to aggressively penalise a suspended contractor is a familiar pressure point, but capitulating without establishing the legal basis for the work stoppage is a dangerous administrative error. You now know that a contractor's valid statutory suspension under the SOP Act explicitly overrides the construction contract, so the contractor is statutorily not liable for the principal's delay loss for that period under section 27(3) of that Act, and you are legally barred from certifying liquidated damages against the contractor for that suspension period.

You also understand that your own administrative directions carry hidden risks. Halting a project—particularly a class 2 building mid-envelope—without concurrently ordering weather-tightness measures can, where your functions amount to construction work under section 36, enliven the personal statutory duty of care in section 37 of the DBPA, which section 39 provides must not be delegated, attaching latent defect liability directly to you. Furthermore, if the principal later challenges your impartial assessments by pleading professional negligence, the proportionate liability framework under the CLA serves as your primary defence to cap your exposure on that distinct claim—without being treated as a general answer to Part 4 defects liability.

Before you draft your next site instruction or certify a disputed delay claim during a suspension, require the principal to produce the contractor's written notice of intention to suspend under section 15, 16 or 24, and confirm that at least two business days passed before work stopped, so your certification boundaries are clear - and do not wait for a dispute to test whether your engagement terms actually protect you. The narrow liability cap described above is precisely the kind of exposure best reviewed before a claim lands, not after. If you are administering a contract under pressure, or you suspect your retainer leaves you exposed to a concurrent claim in tort, speak with our team to have your position reviewed while you still have room to move.

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