Does anybody know how long a landlord is allowed to "inspect" your apartment?

This. And to add to it with some more specifics:

Entry with notice

27 (1) A landlord may enter a rental unit in accordance with written notice given to the tenant at least 24 hours before the time of entry under the following circumstances:

  1. To carry out a repair or replacement or do work in the rental unit.
  2. To allow a potential mortgagee or insurer of the residential complex to view the rental unit.
  3. To allow a person who holds a certificate of authorization within the meaning of the Professional Engineers Act or a certificate of practice within the meaning of the Architects Act or another qualified person to make a physical inspection of the rental unit to satisfy a requirement imposed under subsection 9 (4) of the Condominium Act, 1998.
  4. To carry out an inspection of the rental unit, if,

    i. the inspection is for the purpose of determining whether or not the rental unit is in a good state of repair and fit for habitation and complies with health, safety, housing and maintenance standards, consistent with the landlord’s obligations under subsection 20 (1) or section 161, and

    ii. it is reasonable to carry out the inspection.

Based on this and the information provided by /u/manitoba98, as per the Residential Tenancies Act, it appears that you most definitely have grounds to make a complaint to the Landlord Tenant Board. You won't really get anything out of it (maybe a possible order to lower your rent temporarily due to the loss of enjoyment or allow breaking the lease without penalty to move out if you wish) but the landlord/company stand to have a fairly hefty fine levied against them it the Board judges it's harassment or a contravention under the Act:

Penalties 238. (1) A person, other than a corporation, who is guilty of an offence under this Act is liable on conviction to a fine of not more than $25,000. 2006, c. 17, s. 238 (1).

Same (2) A corporation that is guilty of an offence under this Act is liable on conviction to a fine of not more than $100,000. 2006, c. 17, s. 238 (2).

Also, as you don't mention it, if he's not giving you notice, tell him to get out. As mentioned above, he is required to give a minimum of 24 hours written notice of entry. There are only 2 circumstances in which this is not require:

  • Emergencies
  • You give permission at time of entry

TL;DR Call the Landlord Tenant Board and lodge a complaint. Good luck!

/r/ontario Thread Parent