What are my rights when renting a room in a house?

The same laws apply to you as apply to any other tenant (e.g. someone renting an apartment or a house):

1) The landlord may only evict you for good cause; typically nonpayment or habitual late payment of rent; recklessly or deliberately damaging his/her property; disturbing the rights of other residents to "peaceful enjoyment"; material (important) violations of the lease; or when your tenancy expires.

2) If you have a written lease for a definite period of time (e.g. a one-year lease), other than as above, you can't be evicted until the lease ends; you also can't have your rent increased, or the terms of your tenancy changed, until the current lease ends and a new one starts. If you are a month to month tenant (which includes if there is no written lease), you may be given 30 days notice terminating your tenancy either entirely, or terminating it under the current terms/rent and offering new terms/rent, which you'd have to accept or leave.

3) Your rental unit must be "fit for its intended purpose" (habitable) and the landlord can't prevent you from enjoying or using it.

4) You must pay all costs or fees you agreed to pay; you are entitled to all facilities, space, services, etc. the landlord agreed to provide.