The appeal concerned interpretation of a land development agreement containing a purchase price adjustment clause tied to non-developable acreage and secured by a vendor take-back mortgage.
The application judge treated the fifth anniversary in the clause as a hard deadline, with time of the essence, and held the purchaser lost any right to a price reduction by failing to trigger the process by that date.
The Court of Appeal held that interpretation was commercially unreasonable and inconsistent with the agreement’s structure, the consultant-based determination mechanism, and the surrounding development context.
The fifth anniversary operated as an 'as of' valuation date for measuring non-developable land, not as a limitation-like deadline.
The appeal was allowed, the judgment below set aside, and the purchaser was declared entitled to a price reduction to be determined under the agreement.