Can I sell my share in a non-profit housing co-op for a profit in Ontario?

Generally, no. Non-profit housing co-ops are structured so that members don't build up or sell equity in the underlying real estate the way an owner of a condo or freehold home does. Your membership share is typically a fixed, nominal amount set out in the co-op's bylaws, not an investment that tracks the market value of the building or units, and most co-ops' governing documents specifically prevent a departing member from selling their membership to someone else or profiting from the transfer.

When you leave, you can generally expect to have your original membership share or deposit returned, sometimes after deducting any amounts you owe the co-op, rather than receiving a payout reflecting any increase in the property's market value. This is a deliberate feature of the non-profit model, meant to keep housing affordable for future members rather than letting units become a vehicle for individual investment gains. It's also why a co-op unit shouldn't be evaluated the way a condo or house would be, since there's no resale market for the unit itself in the ordinary sense. Anyone considering co-op housing as an investment, rather than as a place to live, should understand this distinction clearly before joining.