In most cases, yes, you can have a roommate in your apartment, but your lease almost certainly requires you to get written landlord approval before anyone new moves in. Skipping that step turns your new roommate into an unauthorized occupant and gives the landlord grounds to start eviction proceedings against you. The clean path is straightforward: read your lease, ask in writing, let the landlord screen the person, and get them formally added to the tenancy.
Read Your Lease First
Your lease controls whether and how you can bring in a roommate. Look for clauses on occupancy limits, guest policies, adding tenants, and subletting. Some leases explicitly allow roommates with written consent. Others prohibit any occupant not named at signing. Many leases say nothing specific about roommates at all, which is not a free pass; it usually means the landlord’s general approval clause applies to any material change in who lives there.
Pay attention to how the lease distinguishes a “guest” from an “occupant.” Many leases set a threshold, often 7 to 14 consecutive nights, after which a guest is treated as an unauthorized occupant. If someone is staying over regularly, your landlord may already consider them a roommate whether you do or not.
How to Ask the Landlord
Contact your landlord in writing. Email is fine; a letter works too. What matters is the paper trail. Include the prospective roommate’s full name, the proposed move-in date, and a note that you’re willing to cooperate with whatever screening the landlord runs. Verbal approvals get remembered differently by each side later, so keep everything documented.
Expect the landlord to screen the proposed roommate the way they’d screen any applicant: credit history, criminal background, employment and income verification, and rental references. Most landlords charge an application fee to cover screening costs, commonly in the $25 to $75 range depending on jurisdiction. Smaller landlords sometimes skip a formal application; larger property management companies almost always require one.
When a Landlord Can Say No
A landlord can refuse a proposed roommate, but not for any reason they please. The federal Fair Housing Act prohibits denying housing based on race, color, religion, sex, national origin, familial status, or disability.1Office of the Law Revision Counsel. 42 USC 3604 – Discrimination in the Sale or Rental of Housing A legitimate rejection has a stated reason, such as poor credit, insufficient income, a concerning rental history, or a relevant criminal record. A blanket refusal with no reason, or one that appears to target a protected characteristic, can be discriminatory.
Some jurisdictions add another layer, preventing landlords from unreasonably withholding consent to a roommate when the lease requires approval. A handful of cities have ordinances that explicitly protect a tenant’s right to a roommate if the person is qualified. If your landlord refuses and the reason seems pretextual, you can file a complaint with HUD or your local fair housing agency.
Adding the Roommate to the Lease
Once the landlord approves, get the paperwork done. The usual approach is a lease addendum: a short document that names the new roommate, confirms they’re bound by all existing lease terms, and is signed by the landlord, you, and the roommate. Some landlords prefer to terminate the old lease and issue a new one naming all tenants. Either way, the roommate should be formally on the lease so their rights and obligations are clear.
This matters because of joint and several liability, a clause in nearly every multi-tenant lease. Each signer is individually responsible for the entire rent, not just their share. If your roommate stops paying half, the landlord can pursue you for the full amount. They don’t have to chase each tenant proportionally; they can collect from whoever is easiest to reach. Understand this before you sign anything, because it’s where most roommate arrangements go wrong financially.
Handling the Security Deposit
Landlords collect one security deposit per unit, not per person. When you add a roommate, the landlord may or may not require an additional deposit amount, depending on the lease and local law. What the landlord almost certainly won’t do is track who contributed what portion. That’s between you and your roommate.
If a roommate later moves out before the lease ends, the landlord typically won’t release any portion of the deposit until everyone has vacated and the lease has ended. The departing roommate usually gets reimbursed by an incoming replacement or by the remaining tenants. Write down who paid what from the start. A one-page written record between roommates prevents the disputes that surface when the lease ends and only one person receives the refund check.
Subletting Is a Different Arrangement
Subletting is not the same as adding a roommate. When you sublet, you stay on the lease with the landlord and become a mini-landlord yourself: the subtenant pays you, and you remain responsible to the landlord for rent and the condition of the unit. The subtenant has no direct legal relationship with your landlord.
If a subtenant damages the apartment or stops paying, the landlord holds you accountable, and you have to pursue the subtenant separately. Subletting typically requires written landlord approval, and many leases restrict or prohibit it. If your goal is to share the space long-term, adding a roommate to the lease is almost always cleaner. Subletting makes more sense when you’re temporarily away, such as a semester abroad or an extended work assignment, and plan to return.
Write a Roommate Agreement
A roommate agreement is separate from the lease. It’s a contract between you and your roommate covering the day-to-day logistics the lease doesn’t address. The landlord isn’t bound by it and probably won’t see it. It exists to give you and your roommate a written record of what you agreed to, which is exactly what you need if things fall apart.
Courts will generally enforce the financial provisions of a roommate agreement: how rent is split, who pays which utilities, and what happens if someone leaves early. A judge is less likely to rule on whose turn it is to vacuum, but the financial terms carry real weight. At minimum, cover:
- Each person’s share of rent, the due date, and who actually sends payment to the landlord.
- Which utility bills are shared, how they’re divided, and whose name each account sits under.
- How much each person contributed to the security deposit and how reimbursement works if someone leaves early.
- Notice required for an early move-out and whether the departing roommate must find a replacement or keep paying their share.
- Expectations for overnight guests, including frequency and advance notice.
- How disagreements get handled before anyone runs to court.
All roommates should sign and date it. Keep it specific and short. An agreement that tries to legislate every possible scenario never gets signed; one that nails the money questions will save you from the disputes that actually break roommate relationships.
Occupancy Limits Set a Ceiling
Even with landlord approval, local building codes and housing ordinances cap how many people can live in a unit. HUD has endorsed a general guideline of two persons per bedroom as a reasonable occupancy standard under federal fair housing law.2U.S. Department of Housing and Urban Development. Keating Memorandum on Occupancy Standards Local rules can be more restrictive or more permissive depending on square footage, bathroom count, and building infrastructure.
These limits exist to prevent overcrowding, but they can be misused. A landlord who imposes unusually tight restrictions, such as limiting a two-bedroom apartment to two people total, may run afoul of the Fair Housing Act’s prohibition on familial status discrimination if the effect is to exclude families with children.1Office of the Law Revision Counsel. 42 USC 3604 – Discrimination in the Sale or Rental of Housing If a landlord denies your roommate request by citing an occupancy limit that seems unreasonably low, check your local housing code to see whether the limit is real.
Renter’s Insurance for Your Roommate
Your renter’s insurance policy almost certainly does not cover your roommate’s belongings. Most insurers won’t extend coverage to anyone whose name isn’t on the policy, and many won’t let you add a roommate at all unless they’re a spouse or family member. Your roommate needs their own policy.
If a pipe bursts and destroys your roommate’s laptop and furniture, your policy won’t pay for their losses. Renter’s insurance is inexpensive, typically $15 to $30 per month, and some landlords require every named tenant to carry it as a lease condition. Confirm what your lease says and make sure both of you are covered before move-in.
What Happens If You Skip the Approval
Moving someone in without approval is one of the fastest ways to put your tenancy at risk. An unauthorized occupant violates most lease agreements, and the landlord can issue a notice to cure or quit. That notice typically gives you a set number of days, often 3 to 30 depending on jurisdiction, to remove the person or face eviction.
Landlords who discover an unauthorized occupant may also refuse to renew your lease when the current term ends, raise rent at the next legal opportunity, or pursue damages for extra wear and tear. Some tenants figure the landlord won’t find out, but maintenance visits, neighbor complaints, and parking records tend to surface the truth. The approval process actually protects you too: a roommate who’s on the lease has their own legal obligations, which gives you recourse if they cause problems.
A Note for Owners Who Rent Out a Room
If you own the unit (a condo, co-op, or similar) and charge a roommate rent, the IRS treats that as rental income. You report it on Schedule E, even when the roommate is a friend or family member. One exception: if the roommate is simply reimbursing you for their exact share of household expenses with no profit involved, that may not count as rental income. The upside is deductions. You can deduct the rental portion of mortgage interest, property taxes, utilities, repairs, and depreciation, dividing expenses between personal and rental use by a reasonable method such as square footage.3Internal Revenue Service. Publication 527 – Residential Rental Property If you rent the apartment yourself and are simply splitting costs with a roommate, none of this applies to you; you’re not earning rental income.