You are not required to tell you landlord nor can they inhibit the guest from entry. If they ask, you are required to say but nothing actually has to be done during your existing lease. I went through the same thing last year when my gf moved in for a few months, also a rent stabilized place.
All you can do is ask the landlord, that pursuant to your lease, you'd like to add someone to the lease, and then the landlord can offer a new lease or not. And if the LL does offer it, it's up to you whether you want to accept it or not.
Adding anyone to the lease will be a matter of the contract language and the permission of the landlord. Some lease agreements forbid sub-tenants or additional occupants. Some say nothing on the matter. Check the language of the agreement, talk to your mother, and your landlord.
Yes, you can add a tenant to an existing lease. While it's not the most simple process, it's not uncommon for a tenant to request to add a roommate or partner to their lease agreement. However, a lease is a legally binding agreement, so it's crucial to ensure each tenant is listed within the contract.
No one can be added to an existing lease. To add a tenant all parties must agree and a new lease is written. This is a common practice, and most landlords are familiar with it.
You do not have to tell them. You will still be occupying the building and fully responsible for the lease and rent. They don't need to know who you invite to live with you unless your partner causes problems in the building.
Ok, if she is living there, then legally she would be considered a ``tenant at will'' even if she pays no rent and there is no written lease with her on it. The primary tenant (you) would be considered her landlord and could terminate her tenancy with a 30 day written notice to terminate.
In CA, yes the owner / PM will want her on the lease due to laws that would protect her if she established residency thru simply staying there.
Even if your lease or rental agreement doesn't have a specific requirement that the landlord must approve additional tenants, it's normally wise to notify your landlord before moving in another person.
For every additional tenant (a roommate not on the original lease, for example) that moves in, the landlord can raise the rent 10%. The rent must be reduced by the same amount if that tenant moves out.