https://www2.gov.bc.ca/assets/gov/housing-and-tenancy/residential-tenancies/forms/rtb7.pdf?
A landlord must give a tenant at least 3 whole months' notice, in writing, of a rent increase
https://www.cbc.ca/news/canada/british-columbia/rent-hikes-rights-bc-1.6967410?
Yes. Landlords can apply to increase the rent above the set annual rate if they have permission from the tenants, if their operating costs have increased, or if they have spent money on the property.
Patterson says asking tenants for more money can be one of the most problematic types of rent increase, as many tenants feel pressured into saying yes or risk losing their home.
"This is definitely the most common thing we've heard from tenants," he said.
According to B.C.'s Residential Tenancy Branch (RTB), these agreements need to be confirmed in writing along with a Notice of Rent Increase. Tenants still need three months' notice of the increase, and it can still only happen once a year.