https://www.ontario.ca/laws/statute/06r17#BK9

Rental units in detached houses, semi-detached houses or row houses

(3) Sections 120, 121, 122, 126, 127, 129, 131, 132 and 133 do not apply on and after the commencement date with respect to a rental unit if all of the following requirements are met:

1. The rental unit is located in a detached house, semi-detached house or row house which, on or at any time before November 15, 2018, contained not more than two residential units.

2. The rental unit is a residential unit that meets all of the following requirements:

i. The unit has its own bathroom and kitchen facilities.

ii. The unit has one or more exterior or interior entrances.

iii. At each entrance, the unit has a door which is equipped so that it can be secured from the inside of the unit.

iv. At least one door described in subparagraph iii is capable of being locked from the outside of the unit.

3. The rental unit became a residential unit described in paragraph 2 after November 15, 2018.

4. One or both of the following circumstances apply:

i. At the time the rental unit was first occupied as a residential unit described in paragraph 2, the owner or one of the owners, as applicable, lived in another residential unit in the detached house, semi-detached house or row house.

ii. The rental unit is located in a part of the detached house, semi-detached house or row house which was unfinished space immediately before the rental unit became a residential unit described in paragraph 2. 2018, c. 17, Sched. 36, s. 1.