Building construction costs rose in Q4 2025 but at a slower pace than Q3. Residential costs increased 0.4% quarterly and 3.0% year-over-year, while non-residential costs rose 0.5% quarterly and 4.1% annually. Price pressures eased due to fewer residential starts but remained high from material costs and labor shortages. Québec saw the largest residential cost rise; London led non-residential cost growth. Metal fabrications and structural steel divisions had notable increases.