Hard cost benchmark
We start from cost-per-square-foot ranges by building type and Ontario region, then adjust for project-specific drivers such as number of storeys, site conditions, and specialty systems.
Class D estimate · Ontario commercial construction
Ontario Commercial Construction Cost Calculator
A free planning tool that estimates what a commercial project in Ontario could cost per square foot, including hard and soft costs, development charges, HST, contingency, and early-stage risk allowances.
What this tool estimates
A commercial construction budget before drawings are complete.
Built for owners, developers, and project sponsors who need a preliminary budget before schematic design or a quantity surveyor’s take-off is available.
It gives a range rather than a single number, because at this stage cost depends on building type, floor area, location, municipal charges, site servicing, building systems, schedule pressure, and regulatory triggers.
Methodology
How the cost range is built.
Soft cost and fee context
We then add planning, due diligence, design, permits, project management, legal, insurance, FF&E, contingency, and tax, where relevant to a Class D budget.
Development charge exposure
Development charges are included at a planning level for Ontario municipalities. Final DCs and permit fees must be confirmed against current municipal schedules.
- Project types including warehouse, light industrial, cold storage, retail, restaurant and QSR, office tenant improvement, institutional, hospitality, and healthcare.
- Location assumptions for Toronto, Mississauga, Brampton, Markham, Vaughan, Hamilton, Ottawa, Kitchener-Waterloo, Halton, and other Ontario markets.
- Risk flags for brownfield conditions, conservation authority review, PSHSR triggers, OBC Part 3 complexity, utilities, and long-lead equipment.
- Class D allowances (D1 and D4) for unresolved scope that may need specialist study, engineering review, or regulatory confirmation.
Class D estimates are for early feasibility planning only. They are not a quote, tender value, guaranteed maximum price, lender-ready budget, or professional engineering opinion.
FAQ
Questions about the calculator.
How is commercial construction cost calculated in Ontario?
It is typically built up from gross floor area, building type, regional cost per square foot, site conditions, hard and soft costs, permit fees, development charges, HST, contingency, and project-specific risk allowances.
What is a Class D construction estimate?
A Class D estimate is an early conceptual estimate, used while a project is still at the feasibility or pre-design stage. It is useful for go/no-go decisions, but should be read as a range, typically ±20–30%.
Does the calculator include development charges?
Yes, at a planning level, where the project type and municipality allow a reasonable estimate. Actual development charges and permit fees must be confirmed against the current municipal by-law before a budget is finalized.
Can I use this result as a construction quote?
No. This calculator is a feasibility and budgeting tool. It is not a quotation, tender, guaranteed maximum price, financing basis, or professional engineering opinion.
What project types does the calculator support?
The tool is built for Ontario industrial and commercial projects such as warehouses, light industrial facilities, office tenant improvements, retail spaces, restaurants, QSRs, cold storage, institutional buildings, hospitality projects, and healthcare-related facilities.
Copyright and permitted use
© 2026 ProWise Construction. All calculator content, page copy, interface design, methodology, formulas, cost logic, data structure, and generated report format are proprietary to ProWise Construction and are protected by applicable copyright and intellectual property laws.
You may use the calculator results for internal feasibility review and project budgeting discussions for the project information you enter. Reproduction, resale, public redistribution, scraping, reverse engineering, automated extraction, embedding, or republishing of the calculator, its methodology, or generated report format is not permitted without prior written authorization from ProWise Construction.
Once you have a result, send us the project basics for a tighter scope review, especially if it shows regulatory, site servicing, or engineering risk flags.
Request a scope review