It being a suburb of Ottawa I suspect it is 5% for quality assets in pristine conditions in good locations to 8.5% for dumps in bad areas. Use 6% to 6.5% as a rule of thumb, and increase/decrease for area quality, property conditions, vacancies etc.
"the" CAP rate does not exist anywhere. It is a guideline. You pay what a seller takes. If seller wants X and you are not willing to pay it then no deals happens. We just bought a 4.5% CAP rate asset in Edmonton because it had huge suites and immediate rental upside bringing it to a 6%+ asset with no money spent in 3 months. This is not doable in BC, ON or PQ due to rent control laws.
So, offer 6% CAP rate based on actual rents, expenses and vacancies and see where it goes.