Types of Construction Disputes

Construction disputes in Singapore can happen at any stage of a building project; from the contract’s start through to its final completion. Some common issues include payment disputes, plan changes, delays, defects, and final account disagreements. Understanding the different types of construction disputes enables individuals who are involved in this business to identify potential risks early, allowing then to look for appropriate construction dispute resolution support. Independent quantity surveying expertise plays an important role in assessing contractual and financial matters to facilitate fair and informed outcomes. 

Payment disputes are among the most common construction disputes in Singapore. They have a habit of appearing whenever progress payments are delayed, reduced, disputed, or withheld. As construction projects depend heavily on regular cash flow, payment issues can quickly affect project progress, contractor performance, and relationships between employers, contractors, subcontractors, and suppliers.

These disputes tend to happen stemming from disagreements over the valuation of completed works, payment certification, variation claims, retention monies, or whether work has been carried out in accordance with the contract. Employers might argue about whether the works are incomplete or defective, while contractors may argue that the certified amount does not accurately reflect the value of the work performed.

In Singapore, the Building and Construction Industry Security of Payment Act (SOPA) provides a statutory adjudication process that allows parties to recover progress payments faster than having to go through traditional litigation or arbitration. To resolve these disputes it often requires a detailed review of the construction contract,with all documents and supporting evidence to determine each party’s contractual and statutory entitlement. Early identification of payment issues and proper documentation are essential for achieving an efficient and commercially practical resolution.

When there are disagreements over changes to the original scope of works in a construction contract is known as a variation and change order dispute. These changes may be formally instructed by the contract administrator, or they may arrive informally through site instructions, drawings, emails, or verbal directions during the course of the construction project.  

In Singapore construction projects, such disputes are particularly common under standard forms such as those issued by the Singapore Institute of Architects (SIA contracts) and the Public Sector Standard Conditions of Contract (PSSCOC), which are used by government-related developments under the Building and Construction Authority (BCA). These contracts set out stringent requirements on how variations must be instructed, documented, and valued. By doing so, it makes compliance and record-keeping critical.  Variation disputes are at most times, due to the uncertainty or disagreement over whether the additional works are actually considered a “variation” under the contract. 

Some common causes include: 

• Informal instructions or site directions that are later disputed or denied  

• Incomplete or missing written confirmation of variations (emails, site orders, VO forms)  

• Differences in interpretation of drawings or specifications, especially where design changes are gradual  

• Scope creep, where additional works evolve without formal approval  

• Late recognition of variations, often only raised during interim valuations or final account stage  

A common construction project in Singapore that has multiple disputes are related to the Delay and Extension of Time (EOT) where completion is affected by various events. Some of these incidents may entitle a contractor to additional time. Typically, this type of dispute start when parties disagree on whether a delay is excusable under the contract, who is responsible for it, and whether an Extension of Time should be granted.

There are contracts like SIA and PSSCOC that have rules for giving the contractor more time when there are delays. However, disputes often occur when EOT applications are rejected or are only partially granted, which leads to one or more disagreements over the revised completion date and exposure to liquidated damages.

One of the problems with these disputes is figuring out what to do when there are multiple delays that overlap. Establishing whether delays are truly concurrent, and how they should be treated under the contract, requires detailed forensic analysis of the construction programme. This includes identifying the critical path and determining whether the delay actually impacted the project completion date. Coming to a resolution usually involves forensic delay analysis supported by programme reviews, site records, and contemporaneous documentation. Findings are commonly presented in support of negotiations or formal dispute resolution processes such as adjudication under SOPA, mediation, arbitration, or litigation.

Loss and expense or prolongation claims appear when contractors incur additional costs and fees due to the progress of a construction project. It may be because there is a delay, or if there’s some form of disruption by events for which they are contractually entitled to receive compensation. Such claims seek compensation for expenses arising from extended timelines, interrupted work sequences, or productivity‑reducing changes. In Singapore construction projects, such claims can emerge as under the contract, there may be late instructions, design changes, restricted site access, unforeseen site conditions, or other compensable events. 

Unlike a request for an extension of time claim which is a request for additional time to complete the works, a loss and expense claim focuses on recovering the financial consequences of delay or disruption. Contractors must demonstrate that the additional expenditure was directly caused by a compensable event and support their claim with reliable project records, including site and cost documentation, labour records, programmes, and correspondence. Additionally, on complex projects, the amounts involved can be large and may affect the overall project cost a lot. 

Common issues in loss and expense or prolongation claims include: 

• Extended preliminaries and site operating costs resulting from a longer construction period.
• Additional labour, supervision, plant, equipment, and temporary facilities required during the extended project duration.
• Loss of productivity caused by disruption, out-of-sequence working, restricted site access, or frequent changes to construction activities.
• Inefficiencies arising from resequencing of works, acceleration measures, or multiple design revisions.

Resolving loss and expense claims typically requires a detailed review of not only the construction contract, but project records, and the events that caused the delay or disruption. The assessment often involves programme analysis, cost analysis, productivity assessment, and quantum evaluation to determine whether the claimed losses are reasonable, properly supported, and recoverable under the contract. In Singapore, these disputes may be resolved through negotiation, adjudication, arbitration, or litigation, depending on the contractual dispute resolution procedures and the complexity of the claim. 

Defects and quality disputes often result from construction works that fail to meet the requirements that were created in the contract, approved drawings, specifications, as well as recognised industry standards. These disputes may become obvious during construction, at project completion, during inspections before the building is handed over, or after the building has been occupied when hidden defects are then discovered. Defects can range from poor workmanship to the use of wrong types of materials and installation errors. Some other defects can also be from non-compliance with design requirements, or failures caused by defective design.

An important problem in these disputes is determining who is legally responsible for the defect. Liability may rest with the contractor, subcontractor, consultant, or supplier depending on the nature of the defect and the contractual obligations. Not only that but there may also be disputes of whether defects fall within the Defects Liability Period (DLP) or whether they constitute latent defects that remain actionable after the DLP has expired.

An investigation in the defects and quality disputes often require technical details, site inspections, testing, and expert opinions to identify the main cause of the problem. Accurate records, including inspection reports, photographs, quality assurance documents, material certifications, and correspondence, are critical in establishing liability and supporting claims. To resolve these construction project issues, in Singapore, it more than likely will involve assessing the extent of the defects, determining appropriate rectification works, valuing repair costs, and evaluating any associated losses caused by delays, reduced performance, and any damage to other parts of the project.

• Construction defects requiring rectification  

• Latent defects identified after handover  

• Responsibility for repair and remediation costs  

Final account disputes usually happen at the end of a construction project where those involved try to agree on the final contract sum. This process entails reconciling the original contract value with all financial adjustments made throughout the project. This includes variation orders, re-measurements, provisional sums, additional works, omissions, loss and expense claims, liquidated damages, and previous interim payments. Once the final amount payable is determined between the employer and contractor, disagreements at this stage can delay financial closure and would most likely lead to the need for a formal dispute resolution. 

These types of disputes commonly occur where variation works have not been fully agreed upon during construction, supporting records are incomplete, or the different methods of measurement and valuation were used. Contractors may contend that additional works, prolongation costs, or contractual entitlements have been undervalued, while employers may dispute the necessity, pricing, or contractual basis of those claims. Differences over the assessment of completed works, deductions, defects, set-offs, or retention sums can further complicate negotiations. 

In Singapore, final account disputes frequently arise under standard forms of contract such as the SIA Building Contract and the PSSCOC. RTo resolve these disputes, a detailed review of the contract documents, bills of quantities, variation records, site instructions, payment certificates, and supporting cost documentation are needed. This is where a consultant quantity surveyor play a critical role in independently assessing the final account, providing evidence-based valuations that support negotiation, mediation, adjudication, arbitration, or litigation where necessary. 

Contractual and measurement disputes happen when parties disagree on what the construction contract means or the valuation of work that has been done. These issues are common throughout the lifecycle of a project and occur frequently with standard contracts such as the Singapore Institute of Architects (SIA) and Public Sector Standard Conditions of Contract(PSSCOC). Even minor differences in interpreting contract clauses, drawings, specifications, or Bills of Quantities (BOQ) can lead to significant financial claims and delays in reaching agreement on payments or the final account.

Measurement disputes tend to occur when contractors and employers value completed work differently or apply different rules when valuing variations, provisional quantities, or omissions. Also, contractual disputes may arise where the scope of work is unclear, contract documents conflict with one another, or the parties disagree on their contractual rights and obligations. Resolving these disputes requires a detailed review of the contract documents, accurate measurement of the works, and technical-commercial analysis to determine the correct contractual entitlement.

• Interpretation of contract provisions  

• BOQ measurement discrepancies  

• Scope definition and specification conflicts  

• Resolution involves contract interpretation, measurement verification, and technical-commercial analysis. 

Termination and suspension disputes start when construction contracts are stopped or paused before completion. These disputes are usually complex, and would more than likely need detailed financial and contractual entitlement assessments. They typically centre on whether the termination was lawful, if the claims come from suspension or disruption are valid, and how completed works should be valued up to the point of termination. Allegations of wrongful termination are common, especially when contracts are ended without a reason or procedure. Valuation disagreements are also frequent as parties are able to contest the fair assessment of progress achieved before suspension. Resolution often involves preparation of termination accounts, valuation analysis, and careful review of contractual entitlements.

In Singapore, construction dispute resolutions involves claims under the Security of Payment Act (SOPA), recovery of costs for work completed or resources not fully utilised, and costs related to running a construction site such as site staff, temporary offices, utilities, security, and cleaning. These dispute resolution processes require proper documentation, expert valuation, and a clear understanding of contractual obligations to achieve fair and efficient outcomes in construction projects.

• Allegations of wrongful termination  

• Valuation of completed works up to termination  

• Claims arising from suspension or disruption  

• Resolution involves preparation of termination accounts, valuation analysis, and contractual entitlement assessment.