Can a landlord enter my rental without notice in BC?

This answer covers the law of British Columbia.

In most cases, no. A landlord in British Columbia may enter only with your permission, under an order of the director, in an emergency to protect life or property, after the unit is abandoned, or on written notice.

The written notice must be given at least 24 hours and not more than 30 days before the entry. It must state a reasonable purpose and a time between 8 a.m. and 9 p.m. unless you agree otherwise. Allowed reasons include inspecting the property, completing necessary repairs and showing the property to prospective buyers or new tenants, and the notice must state the date, time and reason.

Landlords can enter common areas such as hallways without notice. Entry without notice is also allowed under an arbitrator's or court order, or for units the tenant has abandoned. For showings, notice cannot be sent by text message. If entries continue unlawfully, you can ask the landlord to leave, remind them of the notice rules and document the date, time and details, then apply for dispute resolution if the problem continues. Unlawful access can also breach your right to quiet enjoyment. Your facts matter, so a lawyer can confirm your options.