Check Your Lease First
Most leases list who is authorized to live in the unit and require the landlord's consent before anyone else moves in, even if you're not asking that person to sign the lease itself. Look for clauses about "occupants," "guests," or "subletting and assignment." Many leases also cap how many people can live in the unit based on its size, separate from who's named as a tenant — a two-bedroom unit might be capped at four occupants regardless of how many of them are actual tenants, for instance.
Say your lease currently names just you, at $1,800 a month, and you want to bring in a partner or friend to split costs. Even though you're the one paying rent and taking on a roommate to make the apartment more affordable, most landlords still treat this as adding a new occupant to their property, not just a private arrangement between you and whoever moves in. Skipping that step is one of the most common ways renters end up with an unplanned lease violation on their record.
How Landlords Typically Handle a Request
If your lease requires approval, the usual process is:
- You ask the landlord in writing to add the new person
- The landlord may run a background or credit check on them, the same as for any new tenant
- If approved, the landlord issues a lease amendment or a new lease naming all current occupants as cotenants
- The new roommate becomes jointly responsible for the rent alongside everyone already on the lease
Some landlords are informal about this and will accept a roommate without redoing any paperwork, but that leaves the new person with no legal claim to the unit and can complicate things later, for example if you move out and they want to stay, or if you and the new roommate have a falling-out over who actually has a right to be there.
Can a Landlord Say No?
Generally yes — a landlord can decline to add a new tenant, the same way they can decline any rental applicant, as long as the reason isn't based on a protected characteristic. Federal law prohibits refusing to rent, or making a dwelling unavailable, "because of race, color, religion, sex, familial status, or national origin," and a landlord can't hold your roommate application to a different standard because of one of those characteristics. States and cities often add more protected categories on top of the federal list, such as source of income or marital status, so it's worth checking what your state adds. A landlord can still decline for ordinary, non-discriminatory business reasons — a failed background check, insufficient income, or simply exceeding the unit's occupancy limit are all common, lawful grounds for saying no. If you suspect a denial is discriminatory, see How do I file a housing discrimination complaint?.
What "Adding" Someone Actually Means
Adding a roommate to the lease is different from just letting them move in. Once they're formally added, they become a cotenant with the same rights and responsibilities you have, including being liable for the full rent if you stop paying, and having an equal right to occupy the unit. That's a real trade-off worth thinking through before you ask: your new roommate gains real legal standing, not just a place to sleep. If you just let someone move in without going through your landlord, they may be an unauthorized occupant with no independent right to the unit, which can be its own lease violation — and it leaves you, not the landlord, holding all the risk if the arrangement goes wrong.
If Your Landlord Won't Respond
If you've asked in writing and haven't heard back, follow up in writing again and keep records of every attempt, including dates sent and any read receipts or replies. Moving someone in without approval while you wait risks a lease violation notice or non-renewal down the line, even if the new roommate is paying on time and causing no problems — a landlord doesn't have to have noticed yet for the risk to be real. If your landlord is a larger management company rather than an individual, ask whether there's a standard occupant-addition form, since many have one even if the leasing agent didn't mention it upfront.
Get the Paperwork Right
Honestkey™ can review your uploaded lease and flag its occupancy, guest, and subletting clauses, so you know exactly what approval your landlord requires before you bring a new roommate in, and what happens to your lease if you don't ask first.