Site: nolo.com
... Signing a New Lease or Rental Agreement
If your intended roommate passes the landlord's credit and reference ... checks, the landlord will probably ask both of you to sign a new lease or rental agreement. ... Under normal circumstances, landlords can’t increase rent mid-tenancy—for leases, they must ... wait until the lease ends, and for month-to-month rental agreements, they must give whatever notice ... However, by signing a new lease or rental agreement, you are in effect starting a new tenancy, so the ... Adding a Roommate to the Lease or Rental Agreement ...