Latent Conditions in Construction Projects in Australia

Who is this page for?

This page is for Contractors, Subcontractors and construction business owners and decision-makers who are assessing Site Conditions, dealing with unexpected physical risks on the Site and needing to ensure they have rights to claim for Latent Conditions under their Construction Contract.

In their Construction Contracts, Principals commonly require Contractors to take extensive responsibility for the Site, including Site Conditions and Latent Conditions, and the cost of completing the works. Latent Conditions clauses can leave Contractors and Subcontractors paying for rock excavation, contamination removal, extra costs and delays they did not allow for when tendering. A properly drafted Latent Conditions clause can entitle you to additional payment or time when unexpected physical conditions arise. However, you need to make sure the clause works for you before you sign the contract, and you also need to make sure you comply with all requirements of the clause during Contract Administration, including notice requirements and time bars.

Call Rachelle Hare on (07) 3063 3373 for a free initial chat with a Construction Lawyer and Commercial Manager with 25+ years’ experience in Brisbane and across Australia. Or send Rachelle a message to discuss a Latent Conditions clause or claim or get a free quote for a Construction Contract Review.

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Key Takeaways

Unexpected conditions can turn a priced excavation package into substantial unplanned work. The Contractor’s or Subcontractor’s ability to recover the additional cost depends on the agreed risk allocation and the steps taken after discovery.

Table of Contents

1. Site risk is governed by the terms of the Construction Contract. Principals commonly allocate extensive Site Conditions risk to Contractors (who often pass this risk on to Subcontractors). A Latent Conditions clause can give relief to the Contractor (or Subcontractor) for listed conditions, provided the notice and claiming requirements in the clause are met.
2. The type of Construction Contract you use often affects how Latent Conditions are treated. Australian Standard Contracts, Master Builders Contracts, HIA and purpose-written contracts use different tests, investigation requirements and entitlement mechanisms for what a Latent Condition is and whether (and how) it can be claimed.
3. In order to claim costs and time for a Latent Condition, the Contractor or Subcontractor will usually need to give notice, establish that the condition on site meets the definition, mitigate any loss, and submit their claim within the required time. Contractors and Subcontractors need to make sure they comply with the terms of the contract in all respects.

What are latent conditions in construction contracts?

Latent Conditions are physical conditions or artificial obstructions encountered during construction that meet the definition in the relevant Construction Contract. Under AS 4000-1997, the assessment concerns conditions that differ materially from those a competent Contractor should reasonably have anticipated at tender, taking account of the required enquiries and investigations. Depending on the agreement, a qualifying condition may entitle Contractors to relief for additional cost or delay, including additional payment, a Variation or extra time, subject to the applicable notices and claim requirements.

The difference between Site Conditions and Latent Conditions

Site Conditions include the physical characteristics of a Site, whether visible or concealed. They may include rock, soil, groundwater, existing structures, underground services, contamination and features within an existing building. Construction Contracts often require Contractors to inspect the Site and consider available site data before committing to a price.

Latent Conditions form a narrower category of Site Conditions. Under a common contractual approach, the Contractor needs to establish that the condition was not reasonably anticipated after the investigations required by the agreement. A condition may have been hidden during inspection or pre-contract due diligence yet still be reasonably foreseeable from a geotechnical report or existing investigations into the site. Conversely, a condition might have been mentioned in general terms without the Contractor reasonably anticipating its actual extent.

Read more about Site Conditions vs Latent Conditions

For example:

  • A report identifying soft soil may defeat a claim based solely on encountering soft soil. 
  • Extensive rock that differs materially from borehole findings may support a claim. 
  • Waterlogged ground after recent rain is usually a weather-related Site Condition under contracts that exclude weather. 
  • Unexpected pre-existing groundwater conditions call for a different assessment. 

 

The contractual test, rather than the Contractor’s surprise, determines whether the discovery constitutes a Latent Condition.

How is the competent Contractor test applied?

Tender information and the reasonable Contractor assessment

Under AS 4000-1997, the assessment concerns what a competent Contractor should reasonably have anticipated from the information and investigations identified in the contract. References in commentary to a hypothetical experienced contractor or an experienced contractor test should not replace the signed contract wording.

The reference point for assessment is important to the objective assessment of the facts. Contractors should identify the contractual tender date, the Site information available at that time and the reasonable observations or investigations required by the agreement. Natural variability in ground conditions does not automatically establish a Latent Condition. Compare the subsurface features actually encountered with the available geotechnical data, Site surveys and investigation results.

Site investigation obligations and deemed knowledge

Special Conditions may deem Contractors to have inspected the Site, made particular enquiries or accepted specified risks within the Contract Sum. Contractors should read those provisions with the Latent Conditions definition and any exclusions. A general site inspection obligation does not establish that every concealed condition was discoverable, although the required standard of investigation may extend beyond a visual inspection.

Access also affects what Contractors could reasonably investigate. A Contractor tendering for work inside an operating industrial facility may be unable to excavate beneath an existing slab. The contract, available plans and permission to conduct intrusive testing may become central to a dispute over concealed foundations or underground tanks. The evidence must establish the investigations required and the information reasonably obtainable, rather than merely asserting that the Contractor did not know about the condition.

Geotechnical reports and Principal-supplied information

A Principal may provide a geotechnical report prepared for preliminary feasibility work rather than detailed foundation design. Contractors should check the report’s scope, the location and depth of boreholes, the consultant’s brief and any limitations. Ground conditions between boreholes may differ from those recorded at the test locations.

The contract may incorporate the report, permit reliance on it or disclaim responsibility for its accuracy. Contractors should check those provisions before assuming that the Principal bears the risk of an incorrect report. If the Contractor commissions independent testing, the instructions, results and recommendations also become part of the available site information relevant to Latent Conditions.

What types of Site Conditions can qualify as Latent Conditions?

The examples below illustrate the contractual questions raised by concealed physical conditions. The outcome depends on the executed contract, tender information and investigations required.

Latent Conditions assessment table

Condition encounteredKey action to takeWhy it matters
Extensive rock beneath a commercial construction site where reports indicated ordinary excavationCheck tender baselineActual ground conditions may differ materially from the tender information
Rock ledges clearly identified in the geotechnical reportCheck agreed scopeA competent Contractor may have been expected to allow for them
Unrecorded underground storage tank containing hazardous materialCheck tender baselineConcealed artificial obstruction not reasonably anticipated
Buried asbestos or contaminated fill absent from the site informationCheck tender baselineUnforeseen physical contamination may qualify
Contaminated groundwater differing materially from the investigation resultsCheck tender baselineUnexpected groundwater conditions may affect excavation and remediation
Active electricity cabling missing from utility plansCheck contract definitionDepends on service proving requirements and reasonably obtainable information
Concealed existing air conditioning duct work obstructing refurbishmentCheck contract definitionMay constitute an artificial obstruction within the existing building
Faulty duct work installed by the ContractorCheck agreed scopeUsually a workmanship, design or materials issue
Concealed termite damage to existing structural timberCheck contract definitionDepends on whether the clause covers the physical condition of the existing building
Faulty materials supplied by the PrincipalCheck agreed scopeUsually concerns supply obligations and material quality
Unrecorded mine shafts, cavities or sinkholesCheck tender baselineMay constitute unforeseen subsurface conditions
Archaeological remains found during excavationCheck contract definitionPhysical obstruction, potentially governed by separate heritage provisions
Previously unidentified fault lines or unstable groundCheck contract definitionDepends on geological information and the contractual definition
Flooding caused by recent inclement weatherCheck agreed scopeWeather is excluded from the AS 4000 definition
Buried concrete foundations not shown on demolition plansCheck tender baselineMay be concealed artificial obstructions
A finished element found unfit for purposeCheck agreed scopeUsually a design, performance or defect issue

Unexpected rock and excavation costs

A Contractor may price foundation excavation using the available geotechnical report, then encounter unforeseen rock, including extensive rock ledges requiring drilling, breaking and removal. The relevant difference may concern rock quantity, depth, hardness or excavation effort. Restricted access can increase plant and labour costs. Revised foundations or temporary works may also be required. The Contractor must distinguish additional work caused by the physical condition from work already priced.

Record the location, depth and extent of the rocks as well as any change in conditions of the rock or subsurface materials, before removing it. Keep photographs, excavation quantities, plant and labour records, specialist invoices and the tender information used to price the work. The contract and the notices given determine whether the builder can recover the additional expenditure.

Contamination, asbestos and groundwater

Buried asbestos, PFAS, contaminated fill and undocumented storage tanks can interrupt excavation and require specialist investigation. Groundwater may create a separate problem, requiring dewatering or excavation support.

  1. Isolate the affected work area and address immediate safety and environmental requirements.

  2. Arrange appropriate testing and specialist advice before disturbing the material.

  3. Give the contractually required notice and preserve photographs, sampling results, disposal records and invoices.

  4. Record any changes to excavation, remediation, foundation design or the construction program.

Buried services and concealed building conditions

The physical obstruction may be an old concrete foundation, an unrecorded pipe, active electricity cabling or a redundant service. Confirm the location and status of services before proceeding. Utility providers, service proving and ground-penetrating radar may be required.

Existing duct work hidden behind walls may qualify under a clause covering concealed artificial obstructions. Termite damage requires closer assessment of the existing building, agreed scope and inspection obligations. Faulty materials installed as part of the current works ordinarily raise defects or supply issues rather than a Latent Conditions claim.

Latent conditions under standard form construction contracts

Australian Standard Contracts use different definitions, notice requirements and entitlement mechanisms. Contractors and Subcontractors need to read the executed General Conditions and Special Conditions plus all other Contract Documents together to properly identify all Latent Condition contract requirements.

A Principal can materially alter the standard position through amendments, including deeming provisions, exclusions and additional investigation obligations. Courts assess the executed contract, tender information and contemporaneous records. A Principal’s disclaimer may affect reliance on a report and the necessary information, depending on the agreed wording and facts.

AS 4000-1997

The clause 25.1 of AS 4000 definition in the unamended 1997 edition identifies the relevant physical conditions by comparison with those a competent Contractor should reasonably have anticipated at tender after considering the specified information, reasonable enquiries and the Site. Clause 25.2 requires prompt written notice to the Superintendent, where possible before the condition is disturbed. If requested, the Contractor must provide further particulars.

Clause 25.3 treats the effect of a qualifying Latent Condition as a deemed Variation. In the unamended form, the valuation disregards additional cost incurred more than 28 days before the initial clause 25.2 notice, but includes the Contractor’s costs of complying with clause 25.2. Any Extension of Time must be assessed under the separate time provisions and the executed contract.

AS 2124-1992 and AS-2124-1992

AS 2124-1992 addresses Latent Conditions in clause 12. Clause 12.1 contains the definition, clause 12.2 addresses notification, clause 12.3 addresses consequences and clause 12.4 limits recovery for older costs. Unlike AS 4000 clause 25.3, the AS 2124 mechanism must be assessed on its own wording. Delay claims also require consideration of clause 35.5, while valuation may involve clause 40.5.

Design and construct contracts – AS 4300-1995 and AS 4902-2000 (AS4902-2000)

AS 4300-1995 and AS 4902-2000 require Contractors to consider Latent Conditions alongside design responsibility, the Principal’s Project Requirements and the site information available when tendering. A qualifying discovery may require revised foundations, structural design or construction methodology. Contractors must separate the additional work caused by the physical condition from design development already included in their obligations.

Master Builders Queensland contracts

Master Builders Queensland publishes different residential and commercial contracts. Builders should check the particular form and edition for site conditions, unforeseen work, rock excavation, foundations, Variation procedures and any applicable notices. An allowance or provisional sum will only provide the protection available under the signed contract.

HIA building contracts

HIA’s Queensland QC1, QC2 and QC3 forms should be assessed separately for unforeseen site risk. Builders should consult HIA guidance on contract Variations alongside the signed form. HIA states that QC2 does not contain the unforeseen circumstances clause found in QC1 and provides for more limited Variations. HIA recommends QC2 only where the builder is fully aware of relevant site conditions and building restrictions.

Builders using an HIA contract should check its treatment of hard digging, site conditions, Variations and Extensions of Time. A contractual entitlement must be supported by the required notices and written approvals. The applicable HIA form and edition determine how the builder deals with Latent Conditions.

ABIC, FIDIC and bespoke construction contracts

The ABIC suite of contracts, the FIDIC Conditions of Contract for Plant and Design-Build and other bespoke forms may deal with unforeseen physical conditions through different definitions and procedures. Contracts such as HC-1 2003 and PC-1-1998 require examination of the particular edition and amendments. Australian and New Zealand standard form contracts differ, and a reference to an international standard form does not establish the same rights as an Australian Standard contract.

Not all events and occurrences beyond your control are Latent Conditions. Contractors should also examine any separate provisions for archaeological remains, changes in law, flooding risks, inclement weather or other events beyond their control. Those events may involve different relief from Latent Conditions.

Other legal and insurance considerations

Contractors should consider separate claims and disputes under the Construction Contract and any applicable misleading and deceptive conduct or Unfair Contract Terms provisions of the Australian Consumer Law. Historical disputes involving the Sydney Catchment Authority do not determine entitlement under another contract. Construction law experts must examine the facts and wording for each Contractor or builder, client, Principal or owner or developer.

Insurance professionals should review potentially relevant policies. Insurance companies do not necessarily cover the cost of overcoming an unexpected physical condition, and policy notification obligations may differ from contractual notice requirements. Each potentially available right should be preserved under its applicable procedure.

If a dispute arises, Contractors should preserve expert advice and expert evidence for contractual dispute resolution. Insurance cover remains separate from contractual entitlement.

Head Contractors should examine flow-downs and privity of contract before assuming a Subcontractor can claim directly against the Principal. A robust and comprehensive subcontracting regime should align subcontract notices, testing obligations and risk allocation. Capital Project teams may need adaptable project schedules when discoveries cause cost increases or project overhauls.

Construction managers should record unexpected events in a risk register, event tracker, Project Status Reports and Risk Reports. An automated Risk Register solution or Dashboards may assist, but site records and contractual safeguards remain necessary. A risk management plan, Risk Management Plan Template and construction risk management and reporting controls should assign owners for site investigations and feasibility studies, design risk management and notices.

Project controls and downstream contract risks

Additional work, resources, time and cost may include direct third party costs, construction methodology changes, time recovery, construction program disruptions and program delays affecting a milestone date or completion date. The additional cost involved in overcoming the latent condition is not necessarily the additional cost payable to the Contractor. The contract determines valuation and whether a saving to the client is relevant. Contractors should distinguish expenditure incurred from amounts recoverable under the executed agreement.

Contractors should identify the notice provisions, contractual notifications, time-bar issues and any Early Warning Notice. A notice of a latent condition may require a statement identifying the latent condition encountered. The Contractor should also consider a reservation of rights notice, a time-bar checklist and compliance with notice provisions for a Variation, claimed delay or additional costs and extra time. The burden of proof and causation requirements remain important.

Tender queries, exclusions and clarifications, provisional sums and contingency allocations can address known uncertainty. The Contractor should record the allowance, contract sum, margin or profit, contingency funds and the worst possible case scenario before making a commercial decision. A risk assessment should identify the project risk profile and whether flexible project design or additional design work could reduce exposure.

A significant discovery can require project overhauls rather than a minor adjustment to excavation. Construction managers may need to revise the construction methodology, engage engineers for additional design work and reorganise affected activities. Groundwater, unstable foundations or concealed structures can also cause program delays and cost increases.

The project team should record the commercial decisions made in response, including changes to temporary works, additional testing, procurement and construction resources. These records help distinguish costs caused by the Latent Condition from unrelated project changes.

Other discoveries include archaeological remains, hidden structural issues, air conditioning duct work, hidden pest infestations and water/infiltration issues. Contractors should distinguish concealed Site Conditions from faulty materials, materials supplied by the Principal or owner, and a latent defect. Landowners and design consultants may hold useful historical usage records.

An old, undocumented underground storage tank containing hazardous material may involve buried hazardous materials, soil contamination, asbestos, PFAS, contaminated groundwater or lead-based products. Emergency environmental remediation, dewatering and waterproofing measures may be required. Environmental restrictions and health, safety and regulatory requirements apply independently of whether the discovery meets the latent conditions clause.

Unexpected discoveries can include previously unidentified underground structures, old foundations, old plumbing systems, undocumented services, buried utilities and utility services that are active or redundant. Utility plans and advice from utility providers or authorities help locate cabling, electricity and other services. A Contractor should verify service locations before demolition works, chiselling of rock or use of a clamshell for rock excavation.

Independent site investigations and geotechnical and contamination tests cost money. Contractors should weigh that expense against the excavation effort, quantities, foundation work, foundation design and possible foundational / soil failures. Early works may permit further testing before the full scope of works is priced.

Geotechnical reports may record rock formations, rock ledges, limestone, cavities, fault lines, mine shafts, sink holes, soil instability, varying soil conditions and groundwater conditions. Geologists, surveyors, architects and engineers should identify the limited scope of the reports, testing assumptions and gaps in the available data. Contractors can request the brief to the entity who investigated the site, the outcome of the investigations and detailed records of site investigations and feasibility studies. An inadequate site investigation may leave the Contractor exposed. The cost of targeted testing can be lower than the exposure from unknown ground conditions, but testing without a clear scope can be a false economy.

At the time of tender, Contractors should compare the site information available at the time of tender with the conditions actually encountered. A site inspection and following reasonable investigation may involve site surveys, boreholes, trial pits, standard penetration tests, ground-penetrating radar and service proving. The time of the Contractor’s tender, closing of tenders and the date of the contract can establish the reference point for assessment. A date after the date of the contract may be relevant only if the agreed wording allows it. For AS 4000-1997, the time of the Contractor’s tender is the express reference point in clause 25.1.

Evidence required for a latent conditions claim

Contractors need evidence supporting each contractual requirement. A photograph of unexpected rock establishes what was found, but it does not by itself establish that the condition was latent or that the claimed costs were caused by the discovery.

  1. The actual condition. Site photographs, surveys, samples, test results and expert reports identify the physical conditions encountered.

  2. What should reasonably have been anticipated. Preserve tender documents, geotechnical reports, borehole results, site surveys, utility plans, historical land-use records and tender queries. Compare that information with the contractual reference date and investigation requirements.

  3. Compliance with notices. Dated notices, delivery records and correspondence establish whether the Contractor complied with the prescribed form, recipient and timing.

  4. Additional work and cost. Quantities, labour and plant records, subcontractor invoices, direct third-party costs and instructions establish expenditure attributable to the discovery.

  5. Delay and causation. Construction programs, progress records and delay analysis show whether the condition affected the critical path, milestones or the Date for Completion.

The Contractor must also account for work already included in the scope, mitigation steps and any alternative entitlement or obligations under the contract. The contract determines the recoverable amounts and any additional requirements for proving Latent Conditions.

Evidence Checklist for Latent Conditions

Evidence to preserve and records to take when conditions change

How can Contractors and Subcontractors demonstrate and support a Latent Conditions claim?

Physical evidence

Photographs, locations, surveys, samples, test results and a statement identifying the Latent Condition encountered.

Tender baseline

Tender documents, Site inspection records, geotechnical reports and the investigations required under the contract.

Contractual notices

Notices, correspondence, dates and evidence of compliance with the relevant notice provisions.

Cost and time records

Daily labour and plant records, quantities, Subcontractor invoices and construction program impacts.

How to respond to unexpected Latent Conditions

The Contractor should respond while the condition is still visible. Disturbing the area may destroy evidence that is difficult to reconstruct later.

  1. Make the work area safe. Stop affected work where necessary and obtain advice from engineers, environmental consultants or utility providers.

  2. Record what was found. Photograph the location and extent of the condition, preserve relevant samples and retain contemporaneous site records.

  3. Check the notice requirements. Identify the recipient, deadline and information required by the Latent Conditions clause. Under AS 4000 clause 25.2, the initial notification and any further details requested by the Superintendent are distinct steps.

  4. Assess separate claims. Check whether the contract requires additional notices for a Variation, Extension of Time or another entitlement. An Early Warning Notice or reservation of rights notice may not satisfy those requirements.

  5. Measure the consequences. Record additional excavation, design, plant, materials and Subcontractor costs. Update the construction program and document mitigation, resequencing or time recovery.

If the Principal disputes the claim, the Contractor should follow the contractual dispute resolution procedure and preserve the technical and commercial records. Geotechnical evidence may be needed to assess reasonable anticipation. Program evidence may be required to establish causation and delay.

The Contractor should identify who prepared the geotechnical reports, the brief to the entity who investigated the Site, and any restrictions on testing or access. Further investigations may include trial pits, boreholes, standard penetration tests, ground-penetrating radar, service proving and contamination sampling.

Where access is limited, the Contractor should record the investigations it could not perform and the assumptions used when preparing its tender. This helps determine whether to seek further information, qualify the tender or accept the remaining risk.

Reducing latent conditions risk before tender

Contractors should review site information and identify uncertainties that could materially affect their price. Boreholes, trial pits, standard penetration tests, utility plans, historical land use, contamination records and site surveys can inform the risk assessment. Further testing may be justified where the potential excavation or remediation cost exceeds the investigation cost.

Tender queries should identify the gaps in the available information. Where further testing is not practical, Contractors can negotiate exclusions, provisional sums or a specific method for valuing unforeseen excavation and remediation.

Pre-tender investigation checklist

Before pricing the ground risk

Investigate

Review geotechnical reports, boreholes, trial pits, standard penetration tests, Site surveys and ground-penetrating radar results.

Verify services

Compare utility plans with service proving, utility provider records and information about active or redundant services.

Check the investigation scope

Examine historical usage, testing assumptions, access restrictions and the brief to the entity who investigated the Site.

Allocate the risk

Document tender queries, exclusions and clarifications, provisional sums, contingency allocations and agreed contractual safeguards.

When allowances and qualifications become contractual

An internal estimate allowance does not amend the Construction Contract. The Contractor should ensure that agreed qualifications appear in the executed documents and that any provisional sum operates as intended.

Subcontract notices and head contract recovery

Head Contractors should also check the Subcontracts. A Subcontractor’s notice needs to reach the Head Contractor early enough to preserve any corresponding Head Contract entitlement. Flow-downs should address site investigations, evidence, notices and Variations. Privity of contract generally means a Subcontractor claims against its contracting party, subject to any separate legal basis for a direct claim.

Recording the risk in the project risk management plan

Construction businesses should identify known uncertainties in their risk register, record the available data and assign responsibility for further investigations. The risk management plan should identify possible consequences, contingency funds, contractual safeguards and notice deadlines. Project Status Reports, Risk Reports, Dashboards or an event tracker may help the team monitor discoveries, although the contract records must remain complete.

Rachelle Hare, South Brisbane – In my experience

I look at the tender information, the precise contract wording and what the site team recorded when the condition first appeared. A claim may involve extensive rock excavation or contamination, but the Contractor still needs to prove the additional work and comply with the notices. I have seen how changes to standard clauses can shift substantial site risk onto Contractors before the project begins.

Mistakes that weaken latent conditions claims

Contractors may lose recovery through late notice, incomplete evidence or amendments they did not identify before signing. A site team can also destroy useful evidence by excavating through an unexpected condition before recording it. The contract may require notification before the condition is disturbed, where practicable.

Common errors include:

  • Treating every unexpected discovery as a Latent Condition

  • Overlooking deemed knowledge provisions and Special Conditions

  • Giving notice after the condition has been disturbed

  • Assuming a single notice preserves payment and Extension of Time claims

  • Including work already priced in the Contract Sum as additional cost

  • Claiming delay without showing its effect on the construction program

FAQs about latent conditions

1. Are Latent Conditions always underground?

Latent Conditions can include concealed physical features above or below ground where the contract definition covers them. Existing duct work or buried foundations may qualify as artificial obstructions. Contractors should assess the actual condition, the required investigations and the signed contract before claiming relief.

2. Can hidden pest infestations be Latent Conditions?

Concealed termite damage may qualify where the agreement covers the physical condition of an existing building and a competent Contractor should not reasonably have anticipated the damage. A pest infestation may instead be part of the agreed refurbishment scope or an existing defect for which the Contractor accepted responsibility. The contract and site evidence determine the outcome.

3. What is the difference between a Latent Condition and a latent defect?

A Latent Condition concerns a physical condition encountered during construction that satisfies the contractual definition. A latent defect is a concealed fault in completed work or a building component. Faulty materials, defective air conditioning duct work and an element found unfit for purpose may involve quality, design or supply obligations rather than a Latent Conditions claim.

4. Who pays for unexpected rock excavation?

The contract allocates the risk. A qualifying rock discovery may entitle the Contractor to additional payment or a deemed Variation, depending on the clause and compliance with notice requirements. Builders who have accepted extensive ground risk may have to absorb the cost unless another contractual or legal entitlement applies.

5. Can Contractors claim extra time for Latent Conditions?

An Extension of Time may be available where the contract provides relief for the relevant cause of delay. Contractors must comply with the applicable notices and prove the effect on the construction program. A payment entitlement for a Latent Condition does not automatically establish a separate delay entitlement.

6. Are Latent Conditions covered by insurance?

Contract Works and professional indemnity policies respond to defined insured risks, subject to exclusions. Insurance companies may distinguish physical damage from the extra cost of excavation or remediation. Contractors should ask their insurance professionals whether the project policies cover the relevant event rather than assume insurance will pay for Latent Conditions.

7. What if the Principal supplied incorrect geotechnical information?

Contractors should examine the status of the report, any disclaimers, the investigation obligations and the Latent Conditions clause. Particular representations may also raise issues under the Australian Consumer Law, including misleading and deceptive conduct. Neither an inaccurate report nor a disclaimer automatically determines the Contractor’s entitlement.

8. Can a Principal transfer all Latent Conditions risk to the Contractor?

Principals may seek extensive risk transfer through Special Conditions and deemed knowledge provisions. The enforceability and effect of a particular clause depend on the wording, circumstances and applicable law. The Australian Consumer Law and Unfair Contract Terms regime may be relevant where the agreement falls within their scope.

9. How quickly must a Contractor give notice?

The signed contract specifies the applicable notice requirements. Contractors should notify promptly and preserve the condition where the agreement requires that approach. They must also check separate Variation and Extension of Time notices, because a reservation of rights notice does not necessarily preserve those entitlements.

10. Do Master Builders and HIA contracts cover Latent Conditions?

Master Builders and HIA offer different contract forms and editions with different treatment of unforeseen site work. HIA states that its Queensland QC2 contract lacks the unforeseen circumstances provision found in QC1. Builders must check the exact form, Variation mechanism and notice requirements before assuming they can recover the cost of Latent Conditions.

11. Can Subcontractors claim for Latent Conditions?

Subcontractors may have a claim where the Subcontract provides an entitlement for qualifying physical conditions. They must comply with its notices and proof requirements. Head Contractors should check whether the Subcontract notice period leaves enough time to preserve any corresponding claim under the Head Contract.

Get advice before latent conditions costs increase

Contractors facing unexpected rock, contamination or concealed structures need to identify the relevant clause and notice requirements before additional costs increase. Blaze Business & Legal advises Contractors and Subcontractors on Construction Contract Reviews, Latent Conditions risk allocation, Variations and construction claims. Rachelle Hare brings more than 25 years of Construction Law experience to those discussions.

Call Rachelle Hare on (07) 3063 3373 for a free initial chat with our Construction Lawyer with 25+ years’ experience. Or request a fixed-price quote for defined legal work.

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