A house with four or five bedrooms can be rented two ways. You sign one lease with the whole group for the whole house, or you sign a separate lease with each tenant for their own bedroom plus shared use of the kitchen, bathrooms and living space. The paperwork looks similar. The vacancy risk, the admin load and in some cities the licence you need are not.
The two structures, defined
A joint lease is one tenancy agreement covering one rental unit, with several tenants named on it. The unit is the whole house. Everyone signs the same document, for the same term, at one total rent.
Per-room leases are separate tenancy agreements, one for each bedroom. Each tenant rents their room and shares the common areas with the others. Ontario's Residential Tenancies Act defines a rental unit to include "a room in a boarding house, rooming house or lodging house", so a bedroom let on its own agreement is a full tenancy with its own term, its own rent and its own notice periods.
What changes legally when you split the house into rooms
Two things catch out landlords who make the switch mid-portfolio.
A shared kitchen does not put you outside the Act. There is a persistent belief that room rentals with a shared kitchen are exempt from residential tenancy rules. In Ontario the exemption is narrower than that. Section 5 (i) removes accommodation whose occupants "are required to share a bathroom or kitchen facility with the owner, the owner's spouse, child or parent or the spouse's child or parent, and where the owner, spouse, child or parent lives in the building". Sharing with other tenants changes nothing. If you do not live there, every room lease you sign is a normal tenancy with full security of tenure.
Your municipal licence class can change. Several Ontario university cities license low-rise rental housing, and the class often turns on bedroom count or shared facilities rather than on how many leases you signed. Waterloo is the clearest example: its Class C licence covers "large rental units that operate as boarding or lodging houses", including units with five or more bedrooms and units that share a kitchen or bathroom, and those units have to meet fire and building code rules for that use. New licensing requirements there took effect on July 1. Check your own city's bylaw before you advertise rooms, not after.
Five criteria that decide it
1. Who carries an empty bedroom
This is the criterion that decides most cases. On a joint lease, the rent for the whole house is owed under one agreement. If a roommate falls through in August, the remaining tenants are short and have to sort it out. On per-room leases, an unrented bedroom is your vacancy, at your cost, for as long as it sits. Per-room rents are usually higher in total, and that premium is the price of holding the vacancy risk yourself.
2. What your deposit covers
In Ontario the only security deposit a landlord may collect is a rent deposit, capped at the lesser of one rent period and one month of rent. That cap applies per tenancy. Five room leases mean five deposits, but each one is last month's rent for that room and cannot be applied against another room's arrears. There is no damage deposit either way, which matters more on a per-room structure, because damage in a shared kitchen is much harder to attribute to one tenancy than damage in a unit rented to one group.
3. What happens when one person leaves
On per-room leases, a departure is a normal turnover. One tenancy ends, you re-let one room. On a joint lease, a tenant who wants out mid-term does not remove themselves from the agreement by moving their things to another city. The route is assignment or sublet, which puts a process and a clock in front of you, and gives the remaining tenants a say in who replaces their roommate. If you go joint, learn the sublet and assignment sequence before you need it.
4. How much administration you are signing up for
Per-room multiplies almost everything by the number of bedrooms: leases to draft, deposits to track, move-in dates to attend, notices to serve, renewals to time, ledgers to reconcile. It also makes you the person who settles disputes about the fridge, instead of the group settling them among themselves. A five-bedroom house on per-room leases is closer to running five units than one.
5. Whether your tenants arrive as a group
Groups of friends who already know each other want a joint lease and a single rent to divide. Students arriving alone, transfers, graduate students and international students often have no group to join, and a joint lease shuts them out. If most of your inquiries are single applicants, a joint lease asks them to solve a problem you could solve for them.
When each one is right
Choose a joint lease when the property is near a campus that produces intact friend groups, when the bedrooms are similar enough that no one feels cheated, when you want one rent cheque and one renewal conversation, and when you can accept that a group with a weak member is still a group problem you may end up refereeing.
Choose per-room leases when your applicants come in one at a time, when the rooms differ enough that pricing them separately captures real value, when the house is already licensed for that use, and when you have the time or the staff to run several tenancies in one building. The higher gross rent is real, but it is compensation for vacancy risk and administration, not free money.
Before you sign either one
- Read your municipal rental licensing bylaw and confirm which class the property falls into under the structure you are choosing.
- Confirm the fire and building code requirements attached to that class, and price any work they require before you commit.
- Decide your guarantor policy in advance and apply it the same way to every applicant.
- Write down which spaces are exclusive to each tenant and which are shared, in the lease, not in conversation.
- Set your rent so the two structures are compared on net income after expected vacancy, not on the headline total.
Both structures are legitimate and both are common. The mistake is drifting into one, discovering the licence class or the vacancy exposure in October, and having eight months of tenancy left to sit with it.