What rules apply if I want to convert a multi-unit rental building into condominium units in Ontario?

Converting an existing rental building into condominium units means creating a condominium corporation under the Condominium Act, 1998, which governs how the corporation is established and how units, common elements, and ownership are structured going forward. This is a multi-step legal and administrative process involving the corporation's governing documents and, typically, municipal planning approvals in addition to the condominium registration itself.

Because tenants may already be living in the building when a conversion is proposed, this also intersects with tenant protections under the Residential Tenancies Act, 2006; an owner generally cannot simply evict existing tenants purely to facilitate a conversion, and specific rules and processes apply to how existing tenancies are treated through a conversion. Given how many different requirements overlap, from condominium law to municipal approvals to tenant protections, this is not a project to plan around assumptions from general real estate knowledge. Get experienced legal guidance involved at the earliest planning stage, well before committing significant resources to the idea.