This is what leases are for. And I don't think this is a thing. I am a landlord, and a member of several landlord groups. Most landlords I know increases the

This is what leases are for. And I don't think this is a thing. I am a landlord, and a member of several landlord groups. Most landlords I know increases the price of rent slower than the market for good tenants(some follow market, none raise above market). This is because it costs just as much for a landlord to replace a tenant as vice versa. A landlord usually pays 1 months rent to find a new tenant. Plus any losses out on rent while it's not being rented(several weeks). Has to run through and do audit of the property. Replace locks, etc.. It can easily cost $1800 on a $1000 a month rental. And moving is usually cheaper than $1800.