Why Variation Orders Can Make or Break a Construction Project

Kaylin Hilton
2nd Jun, 2026

In the construction industry, change is almost inevitable. No matter how detailed the planning process may be, construction projects rarely proceed exactly as originally intended. Design modifications, unforeseen site conditions, client requests and documentation errors frequently lead to changes during the construction phase. These changes commonly known as variation orders, can significantly influence a project’s cost, timeline, and overall success.

From my experience as a Junior Quantity Surveyor, I understand that variation orders are not necessarily a sign of poor planning. In many cases, they are unavoidable and even necessary for improving project outcomes. However, what truly determines a project’s success is how those variation orders are managed throughout the construction process.

 

Understanding Variation Orders

A variation order refers to any alteration made to the original scope of work outlined in a construction contract. According to RICS (2015), variations may include additions, omissions, substitutions, or changes to the design, quality, quantity, or sequence of work.

In practical terms, variation orders can range from small architectural changes to major revisions affecting the structural design or construction methodology. These changes usually require formal instructions, cost evaluations, revised timelines, and approval from the relevant stakeholders before implementation.

While variation orders are common, they introduce a level of uncertainty into projects that must be carefully controlled. If not managed effectively even relatively small changes can create major consequences for both contractors and clients.

 

The Financial Impact of Variation Orders

One of the most immediate effects of variation orders is the impact on project cost. Changes to the original scope often require additional labour, materials, equipment or subcontractor involvement. In many cases, variation orders also result in rework, procurement delays, or disruptions to planned construction activities.

South African studies identify variation orders and scope changes as major contributors to construction project cost overruns, delays, and inefficiencies (Khabisi, Aigbavboa and Thwala, 2016).

As a Junior Quantity Surveyor, I have learned how critical it is to accurately measure, value and monitor variation orders throughout the lifecycle of a project. A single variation may appear insignificant at first, but when multiple changes accumulate over time, the financial implications can become substantial.

This is where effective cost management becomes essential. Quantity Surveyors play a vital role in ensuring that variation orders are properly assessed, documented and communicated to all stakeholders. Without disciplined cost control procedures, project budgets can quickly spiral beyond their original limits, affecting the profitability and viability of the project.

 

Delays and Programme Disruption

In addition to financial implications, variation orders can significantly affect project schedules. Construction programmes are carefully planned to coordinate labour, materials, equipment and subcontractors within strict timelines. When changes occur unexpectedly, they often disrupt this coordination.

Variation orders can slow down productivity and contribute to project delays, especially when communication between stakeholders is poor.

Studies in the South African construction industry identify poor communication and weak coordination as key contributors to project delays (Vahed, 2022).

In practice, one of the most effective ways to minimise delays caused by variation orders is through early communication and prompt decision making. Clear instructions and timely approvals help reduce uncertainty on site and allow contractors to adjust their programmes more effectively.

In a fast-paced construction environment, delays caused by poorly managed variation orders can lead to increased overhead costs, strained relationships, and even contractual disputes.

 

The Importance of Proper Documentation

One of the most valuable lessons I have learned in Quantity Surveying is that documentation is essential when dealing with variation orders. Every instruction, revised drawing, site meeting discussion, cost adjustment, and approval should be properly recorded and tracked.

In many construction disputes, the issue is not necessarily the variation itself, but rather the lack of clear documentation supporting what was instructed, agreed upon, or completed. Poor record-keeping creates confusion and leaves room for disagreements between project stakeholders.

Good documentation provides transparency and accountability. It ensures that all parties have a shared understanding of the changes being implemented.

In modern construction practice, digital project management systems and cloud-based documentation platforms are increasingly helping teams improve communication and maintain accurate records in real time.

 

Contract Administration and Risk Management

Variation orders are closely connected to contract administration. Most standard construction contracts outline clear procedures for how variations should be instructed, valued, approved, and implemented. Adhering to these procedures is critical for protecting both the client and contractor.

As a Junior Quantity Surveyor, I am continuously learning that even small deviations from established contract procedures can lead to confusion, delays, or financial claims later in the project.

In an industry where projects are becoming increasingly more complex, strong contract management skills are more important than ever.

 

The Human Side of Variation Order Management

Beyond cost and programme effects, variation orders also affect relationships between project stakeholders. Poor communication, delayed approvals or disagreements over valuation can quickly create tension between clients, consultants and contractors.

Construction projects rely heavily on collaboration and teamwork. When variation management processes are unclear or inconsistent, trust between stakeholders can deteriorate, affecting decision-making and project performance.

In my experience, professionalism, transparency and communication are just as important as technical knowledge when managing variations. Keeping all parties informed and involved throughout the process helps maintain positive working relationships and encourages smoother project delivery.

 

Conclusion

Variation orders are an unavoidable reality within construction projects. While some changes are necessary and beneficial, their impact on cost, time and project performance depends largely on how effectively they are managed.

From my experience as a Junior Quantity Surveyor, successful variation management requires clear communication, accurate documentation, disciplined cost control and strict adherence to contract procedures. These elements work together to minimise disruption, reduce disputes and maintain project stability.

When managed properly, variation orders can be integrated into a project without causing significant setbacks. However, when poorly controlled, they can lead to serious financial pressure, programme delays and damaged professional relationships.

Ultimately, effective variation management remains one of the key factors contributing to the successful delivery of construction projects in today’s increasingly complex and fast-moving construction industry.

 

References

• Khabisi, J., Aigbavboa, C. and Thwala, W. (2016) An assessment of construction projects cost overruns in the public sector. Proceedings of the International Structural Engineering and Construction Conference (ISEC). Available at: https://pure.uj.ac.za/en/publications/an-assessment-of-construction-projects-cost-overruns-in-the-publi/ (Accessed: 25 May 2026).
• Royal Institution of Chartered Surveyors (RICS) (2015) Interim valuations and payment: 1st edition. RICS Practice Information. London: RICS. Available at: https://www.rics.org/content/dam/ricsglobal/documents/standards/Interim-valuations-and-payment_1st-edition.pdf (Accessed: 25 May 2026).
• Vahed, F. (2022) Causes and effects of delays in road construction projects in South Africa. Master’s thesis, University of Cape Town. Available at: https://open.uct.ac.za/handle/11427/37111 (Accessed: 25 May 2026).

 

 

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