What Is a Construction Change Order?
A change order is a formal written amendment to a construction contract that modifies the original scope of work, adjusts the contract price, or revises the project schedule. Change orders are a standard and expected part of construction. Unforeseen site conditions, design refinements, and owner-initiated additions all generate legitimate change orders on virtually every project in Metro Vancouver.
What distinguishes well-managed projects from difficult ones is not the absence of change orders, but the presence of clear processes for evaluating, pricing, and approving them. When those processes are established before construction begins, change orders are handled efficiently and transparently. When they are not, they become a source of budget uncertainty and schedule pressure.
For property owners in Metro Vancouver, where construction complexity is elevated by seismic requirements, BC Energy Step Code compliance, strata bylaw restrictions, and heritage overlay conditions, understanding how change orders work is an essential part of protecting your investment.
The Vancouver Context
Vancouver's regulatory environment is among the most layered in Canada. Seismic design requirements, BC Energy Step Code 4 compliance, strata corporation approvals, and heritage designations all create conditions where the full scope of required work may not be apparent at the time of tender. When scope gaps emerge during construction, they generate change orders, and how those changes are priced depends heavily on what the original contract anticipated.
Construction costs in Metro Vancouver are among the highest in the country. Even modest percentage variances in change order pricing translate to significant dollar amounts on high-value residential and commercial projects. A well-structured contract with clear change order provisions is the most effective tool an owner has to ensure that pricing remains fair and verifiable throughout the project.
The competitive local construction market also means that tender prices are carefully calibrated. Allowances and provisional sums, which are placeholder amounts for items not fully defined at tender, are common on Vancouver projects and require active management to ensure they are reconciled accurately as work progresses.
Five Areas That Require Careful Attention
Experienced owners and their advisors focus on the following areas when reviewing change orders.
Scope definition at tender. The more completely a project is defined before tender, the fewer change orders will arise from scope gaps. Items such as waterproofing specifications, fixture selections, temporary services, and site logistics should be addressed in the contract documents rather than left as assumptions. Where items are genuinely undefined, they should be captured as explicit allowances with clear reconciliation procedures.
Specification ambiguity. When drawings and specifications contain ambiguous language, contractors will typically price to the most economical interpretation at tender. If a more expensive interpretation is later required, a change order will follow. Independent review of tender documents before they are issued is the most effective way to identify and resolve ambiguities before they become disputes.
Markup and overhead structures. Construction contracts should clearly define how change order costs are calculated, including labour rates by trade, material markup percentages, equipment rates, and overhead and profit allowances. Without agreed rates, each change order becomes a separate negotiation, which is inefficient and creates uncertainty for both parties.
Schedule impact assessment. A change order that affects project cost does not automatically affect the project schedule. Owners should expect contractors to demonstrate, through reference to the project schedule and critical path, why a particular change order requires a time extension. Schedule and cost impacts should be assessed and documented separately.
Informal approvals. Construction moves quickly, and scope changes are often discussed informally on site before formal documentation is prepared. Establishing a clear protocol that no change order work proceeds without a signed change order form protects both the owner and the contractor by ensuring all parties have a shared understanding of what was agreed and at what price.
What Your Contract Should Address
The foundation of effective change order management is a construction contract that defines the process clearly before the project begins.
All changes to scope, price, or schedule should be documented in writing and signed by both parties before work proceeds. This is a standard requirement in CCDC contracts, the Canadian Construction Documents Committee standard forms widely used in institutional and commercial construction, and is equally important in residential and renovation contracts, where it is sometimes omitted.
Change order pricing should be based on pre-agreed unit rates or an open-book cost-plus structure with auditable backup documentation. Pre-agreed rates for common labour, material, and equipment items eliminate the need for negotiation on each individual change and provide a transparent basis for independent verification.
The contract should specify a threshold above which change orders require independent review before the owner approves them. For significant projects, this provision ensures that material changes receive appropriate scrutiny before the owner commits to additional expenditure.
Dispute resolution procedures for change orders should be clearly defined, including timelines for submitting, reviewing, and responding to change order requests. The BC Prompt Payment and Construction Lien Act, which came into full force in 2023, establishes statutory timelines for payment claims and notices of dispute, and understanding these provisions is important for owners managing active construction projects in British Columbia.
How Independent QS Review Supports Owners
An independent quantity surveyor provides owners with professional cost oversight throughout the construction process, including the review and assessment of change orders as they arise.
When a change order is submitted, the QS reviews the proposed scope against the contract documents to confirm that the work is genuinely outside the original scope. This involves checking drawings, specifications, and contract provisions to establish whether the item was included in the original tender or represents a genuine addition.
The QS then assesses the pricing against current market rates for labour, materials, and equipment in Metro Vancouver, and verifies that markup percentages are consistent with the agreed contract terms. Where backup documentation is available, including subcontractor quotes, supplier invoices, or labour records, the QS reviews it against the proposed change order amount.
The QS also evaluates any claimed schedule impact against the project schedule and critical path analysis. This ensures that time extensions are granted only where they are genuinely warranted by the scope of the change, and that schedule and cost impacts are assessed independently.
For owners who are not construction professionals, this independent review provides the technical foundation for confident, informed decision-making. It also supports a constructive working relationship with the contractor by ensuring that change order discussions are grounded in documented evidence.
When a Change Order Is in Dispute
When a change order amount is in dispute, the most productive first step is to request complete backup documentation, including subcontractor quotes, supplier invoices, labour time records, and equipment costs, and to have that documentation reviewed by an independent QS. In many cases, a detailed review resolves the dispute by identifying specific line items that can be reconciled through discussion.
Where a dispute cannot be resolved through negotiation, the contract's dispute resolution provisions apply. Most commercial construction contracts in British Columbia provide for mediation as a first step, followed by arbitration or litigation if mediation is unsuccessful. The BC Prompt Payment and Construction Lien Act also provides a structured adjudication process for payment disputes, with prescribed timelines and procedures.
Engaging independent professional advice early in a dispute, before positions become entrenched, typically leads to faster and less costly resolution for both parties.
Starting on the Right Foot
The most effective approach to change order management begins before construction starts. Engaging an independent quantity surveyor during the pre-construction phase to review contract documents, identify scope gaps, establish change order protocols, and advise on allowance structures creates the conditions for transparent and manageable processes throughout the project.
For owners undertaking high-value renovations or new construction in Vancouver, combined project management and QS oversight provides comprehensive support across both cost and schedule dimensions. When the same team that monitors project progress also reviews change orders and invoices, the owner benefits from integrated oversight and a single point of accountability.
Quantus CMI provides independent change order review, construction cost oversight, and full project management services for owners, developers, and lenders across Metro Vancouver and Canada. Contact us to discuss how independent oversight can support your next project.