Yes. Under Ontario's Pesticides Act, a business that applies pesticides for payment needs an operator licence, and the person applying them needs an exterminator licence, in the structural class for work in and around buildings. Ask to see both.
Under the Residential Tenancies Act the landlord must keep the unit in good repair, which includes taking reasonable and timely steps against bed bugs once told about them. Tenants must prepare the unit and allow access. Disputes go to the Landlord and Tenant Board.
Chemical treatment usually takes two or three visits about two weeks apart, because eggs survive the first round. Heat treatment can be done in a day. Clutter and poor prep are the most common reasons a treatment fails.
Cold nights push mice indoors. They fit through gaps about the size of a dime around pipes, vents and garage doors. Trapping clears the ones inside; sealing the gaps keeps the next ones out.
Indicative 2026 ranges: bed bug chemical treatment $300 to $900 for a small unit, heat treatment $1,000 to $3,000 or more; mouse control $200 to $500; carpenter ants $300 to $800; wasp nests $100 to $200 for accessible nests. The inspection sets the price.
Products are federally registered and applied to the label. You get the product names and how long to stay out of treated areas in writing. Bait stations are locked and placed out of reach.