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Class D estimate · Ontario commercial construction

Construction Cost Estimator

Enter the project basics, then generate your report. How it works · Methodology

Disclaimer. This calculator produces a Class D conceptual estimate per AACE International Recommended Practice 18R-97, with an expected accuracy of roughly ±20–30%. It is not a quotation, tender, financing basis, contract value, guaranteed maximum price, or professional engineering opinion. Ranges are indexed to Q4 2025 benchmark data (Altus Group 2025, RSMeans Canada 2025, Infrastructure Ontario project database) and adjusted for project type, location, and site conditions. Material decisions require qualified engineering and quantity-surveying review. See How Estimates Work for the full methodology.