When Public Projects Affect Private Property: The Role of Expert Witness Appraisers in BC Expropriation
A road widening takes a strip of commercial frontage. A utility corridor introduces new restrictions across a property. An infrastructure project changes access to a development site.
The area affected may be straightforward to measure. Its impact on property value can be considerably more complex.
At Jackson & Associates Ltd., expropriation appraisal is part of the work we undertake for clients at the intersection of real estate valuation and law. Our role is to provide independent valuation analysis that helps clients and their legal advisers understand the property interests affected and the evidence supporting an opinion of value.
Understanding the property interest
British Columbia’s Expropriation Act establishes the compensation framework for proceedings within its scope. Section 31 addresses market value and disturbance damages, subject to qualifications where valuation reflects a different use. Section 40 addresses partial takings, including qualifying reductions in the value of remaining land.
For the appraiser, the starting point is understanding exactly what is being acquired.
Is the acquisition of an entire property, a portion of a site, or a limited interest such as a statutory right of way?
What rights will the owner retain?
What restrictions will apply?
What is the relevant valuation date?
These questions shape the assignment. A permanent right of way across a critical development area may have very different implications from one along a boundary that does little to restrict the property’s use.
A small taking can raise significant valuation questions
Consider a hypothetical road widening affecting the front of a commercial property. The acquired strip might contain only a small percentage of the site, but its removal could affect parking, vehicle circulation, loading or redevelopment options.
The appraisal should investigate whether those changes influence what a purchaser would pay for the remaining property. It should also test whether practical modifications could address the impacts.
Section 40 permits a before-and-after valuation approach to the land component of a partial-taking claim, subject to statutory provisions. Section 44 addresses deductions for benefits. The analysis therefore requires more than multiplying the area acquired by a unit price.
In our hypothetical example, losing parking does not establish a particular dollar loss by itself. The appraiser needs evidence connecting the physical change to market behaviour. That may involve examining comparable properties, leasing implications, site functionality and the feasibility of corrective work.
Independence gives the opinion its value
An expert witness appraiser may be retained by a party, but their obligation when giving expert opinion evidence is to assist the court. BC Supreme Court Civil Rule 11-2 expressly distinguishes that duty from advocacy for a party.
For clients, that independence is valuable. A credible appraisal identifies both the strengths and limitations of the valuation evidence. It tests assumptions, considers competing explanations and acknowledges uncertainty.
The objective is a conclusion that can withstand scrutiny. Sometimes that supports a client’s expectations. Sometimes it requires a candid discussion about why the available evidence points elsewhere.
Building an opinion that can be examined
A persuasive valuation report makes its reasoning visible.
The reader should understand why particular sales were selected, how differences were addressed, what assumptions were necessary and how the final conclusion follows from the evidence. Rule 11-6 requires expert reports to identify matters including qualifications, instructions, opinions, reasons, factual assumptions, research and documents relied upon.
From an appraisal perspective, particular attention should be given to the effective valuation date. Later information must be identified and assessed for its relevance to conditions at that date, rather than allowed to introduce hindsight.
Development potential also needs careful examination. A proposed future use should be tested against planning constraints, physical conditions, financial feasibility and market demand. An optimistic concept plan alone is insufficient support for a value conclusion.
Working alongside legal counsel and other specialists
Expropriation assignments benefit from clearly defined professional roles.
Legal counsel addresses entitlement, statutory interpretation and litigation strategy.
The real estate appraiser assesses property value within the applicable framework.
Depending on the issues, planners, engineers, surveyors, environmental consultants or business valuators may provide additional evidence.
For example, an appraiser may analyse the market implications of a revised access arrangement while relying on a transportation engineer to assess whether that arrangement is workable. Keeping those responsibilities clear helps prevent unsupported assumptions and overlapping loss calculations.
Early involvement also allows the team to document existing conditions, obtain relevant records and identify missing evidence before physical changes occur. A well-supported appraisal can help narrow disagreements and inform settlement discussions as well as court proceedings.
Continuing the conversation
Jackson & Associates Ltd.’s senior appraisers will attend the British Columbia Expropriation Association’s annual conference in Vancouver on October 23–24, 2026.
The event brings together professionals working in this specialised field.
For us, it is an opportunity to continue the conversation about sound valuation practice and the practical challenges facing property owners and legal advisers.
If a proposed acquisition or public project affects your property (or a client’s property) contact Jackson & Associates Ltd. to discuss the appraisal requirements.
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This article provides general appraisal information. Legal entitlement and the application of legislation to a particular property require advice from legal counsel.
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