Glossary

Roommate & shared-housing glossary

The terms you'll run into when finding a roommate or renting a shared home, in plain language. Definitions are general and educational — exact meanings vary by location and lease.

Co-living: A housing model where residents rent private bedrooms in a professionally managed shared home, with communal kitchens and living areas and often included utilities, cleaning, and community events. It sits between traditional roommates and renting a whole unit.
Compatibility matching: Pairing potential roommates based on the factors that predict living well together — sleep and work schedules, cleanliness, noise tolerance, guests, and budget — rather than on photos or who messages first. It's the approach Roomit is built around.
Flatshare / flatmate: British and Commonwealth terms for a shared apartment (a 'flat') and the people you share it with. A flatmate is the equivalent of a roommate.
Guarantor (co-signer): A person — often a parent — who agrees to pay the rent if the tenant can't. Landlords may require one for students or renters without local credit or income history.
Head tenant (lead tenant): The tenant whose name is on the lease and who is responsible to the landlord, sometimes subletting rooms to others. The head tenant collects rent from roommates and passes it to the landlord.
Identity verification: Confirming a person is who they claim to be, often via a selfie matched against a government ID. On roommate platforms it reduces fake profiles and, when shown as a badge, helps you decide who to trust.
Lease: The binding contract between a landlord and tenant(s) that sets the rent, term, and rules for renting a property. Everyone named on the lease is generally responsible for the full rent, not just their share.
Month-to-month: A tenancy that renews each month rather than for a fixed term, endable by either party with proper notice (often 30–60 days). It offers flexibility at the cost of less security than a fixed-term lease.
Rent split: How roommates divide the total rent. An even split divides it equally; a weighted split charges more for larger bedrooms, private bathrooms, or other advantages, which is often fairer when rooms differ.
Rental scam: A fraud in which a fake listing or fake landlord/roommate pressures you to send money — a deposit or first month's rent — before you've seen the place or met the person. The defining rule to avoid it: never pay before viewing and verifying.
Roommate: A person you share a home with and typically split rent and living costs with. Roommates may each rent their own bedroom in a shared unit or share a space, and may or may not all be named on the lease.
Roommate agreement: A written document roommates sign that sets out how rent, bills, chores, guests, quiet hours, and move-out notice are handled. It isn't usually a lease, but it prevents most day-to-day disputes by making expectations explicit.
Security deposit: A refundable sum paid to the landlord before move-in to cover unpaid rent or damage beyond normal wear. It's returned at move-out minus legitimate deductions; rules on amount and return timelines vary by jurisdiction.
Sublet (sublease): An arrangement where an existing tenant rents their unit — or a room in it — to someone else for part of the lease term, while remaining responsible to the landlord. Common for co-op terms, semesters abroad, and summer moves. Many leases require the landlord's written permission first.
Subtenant: The person who rents from an existing tenant in a sublet, rather than directly from the landlord. Their agreement is with the head tenant, who stays on the hook to the landlord.
Utilities: The essential services for a home — electricity, gas, water, internet, and sometimes trash. Roommates decide whether utilities are included in rent or split separately, and in whose name each account sits.

Put the terms to work: read the roommate guides or find a roommate in your city.