What legal protections exist for a buyer redeveloping a brownfield site in Ontario?

Ontario's brownfield framework, set out under the Environmental Protection Act, offers a buyer redeveloping a formerly contaminated site a path to limit ongoing environmental liability by having the site properly assessed, remediated to the applicable standard for its intended use, and documented through a filed Record of Site Condition. Filing an RSC in good faith, based on legitimate assessment and remediation work, is generally understood to provide a measure of protection against certain future ministry orders relating to the contamination addressed in that record.

This protection is not unconditional. It depends on the RSC accurately reflecting the true condition of the site, on the assessment work being done properly by a qualified professional, and on the owner complying with any Certificate of Property Use that may restrict how the remediated land can be used going forward. A buyer considering a brownfield redevelopment should budget for the full assessment-to-filing process as part of the deal, get independent review of any existing environmental reports rather than relying solely on the seller's documentation, and treat the RSC as an ongoing compliance obligation rather than a one-time box to check.