Quick answer. Under Alberta's Residential Tenancies Act sections 21 and 22, a residential tenant may sublet or assign their tenancy to another person only with the landlord's written consent. The consent cannot be unreasonably withheld. A sublet is where the original tenant keeps the lease and re-rents to a subtenant for part or all of the remaining term; the original tenant remains liable to the landlord. An assignment is a full transfer of the lease to a new tenant; the original tenant is released from future liability (in most cases). Landlords who unreasonably refuse consent may face RTDRS findings that permit the tenant to sublet without consent or terminate the lease. Reasonable grounds for refusal include: the proposed subtenant or assignee fails standard screening criteria, the proposed use would breach the lease, or specific building rules prohibit the assignment structure. Unreasonable grounds include: discrimination on Human Rights Act protected grounds, or refusal without any specific stated reason.
Sublet vs Assignment: The Legal Difference
The two structures have very different consequences for the original tenant.
Sublet
The original tenant enters into a sublease with the subtenant. The original tenant collects rent from the subtenant, pays rent to the landlord, and remains fully liable to the landlord for the full term of the original lease. If the subtenant fails to pay, damages the property, or breaches other lease terms, the original tenant is on the hook. The landlord's contract remains with the original tenant; the landlord does not typically have a direct contractual relationship with the subtenant.
Assignment
The original tenant transfers the entire lease to a new tenant (assignee). The new tenant steps into the original tenant's shoes with all rights and obligations from the effective date forward. In most cases, the original tenant is released from future liability (though liability for pre-assignment breaches survives). Because assignment fully transfers responsibility, landlords typically apply their standard screening criteria to the proposed assignee before consenting.
The Consent Framework
The RTA requires the landlord's written consent for both sublet and assignment. Consent cannot be unreasonably withheld. In practice, this means:
- The landlord may apply standard tenant screening criteria to the proposed subtenant or assignee (credit check, income verification, references, identity).
- The landlord may refuse if the proposed person fails standard screening (poor credit, insufficient income, poor references).
- The landlord may refuse if the proposed use would breach the lease (bringing in more occupants than the lease permits, changing use from residential to commercial, introducing pets to a no-pet lease).
- The landlord may charge a reasonable administrative fee for processing the consent request (typical range: $50 to $150; larger amounts risk being ruled unreasonable).
What Counts as Unreasonable Refusal
- Refusing without stating any specific reason.
- Refusing based on a Human Rights Act protected ground (race, religion, gender, age, family status, source of income, disability, sexual orientation, etc.).
- Refusing because the landlord dislikes the current tenant and wants to force them to keep paying.
- Refusing to consider the request within a reasonable time (typically 7 to 14 days).
- Applying materially different screening standards to the proposed subtenant than the landlord would apply to a new tenant off the market.
- Refusing based on preferences that would violate the Alberta Human Rights Act (e.g., 'I only want single professionals, not families').
The Tenant's Options If Consent Is Unreasonably Withheld
A tenant who has requested consent, provided a qualified proposed subtenant or assignee, and received either no response or an unreasonable refusal, has three remedies. First, file an RTDRS application seeking an order that consent is unreasonably withheld and the sublet or assignment may proceed. Second, seek an order terminating the lease with reasonable notice. Third, in some circumstances, proceed with the sublet or assignment without consent and defend against any subsequent landlord action; this is a risky approach and typically only used where RTDRS has already been engaged.
Practical Landlord Response Framework
When a tenant requests sublet or assignment consent, a reasonable landlord response process:
- Acknowledge the request in writing within 3 business days.
- Request standard information about the proposed person (application, credit check authorisation, income verification, references).
- Apply the same screening criteria the landlord uses for new tenants.
- Respond in writing with either consent (typically with a consent letter and any conditions) or refusal with specific stated reasons within 7 to 14 days of receiving complete information.
- For consent, execute a consent document naming the parties and effective date. For assignment, execute an assignment agreement that transfers the lease and releases the original tenant from future liability.
Common Complications
Condo Bylaws
Some condominium bylaws restrict subletting or require the condo corporation's consent in addition to the landlord's. Where this applies, the landlord's consent is not sufficient by itself; the tenant must also obtain condo consent. The landlord should disclose this requirement upfront when initially responding to the request.
Short-Term Sublet vs Long-Term Sublet
A tenant subletting the entire unit for a few weeks (e.g., during their own travel) is technically the same legal framework as a longer sublet, but landlords often apply a lighter-touch approach in practice. Airbnb-style short-term commercial subletting typically requires additional consent and may violate the lease's residential use clause; landlords generally refuse this on lease-breach grounds.
Assignment During a Fixed-Term Lease
Assignment is often the tenant's chosen mechanism when they need to leave a fixed-term lease early. It allows the tenant to exit the lease liability by finding a qualified replacement. Landlords who refuse assignment consent in these circumstances face particular RTDRS scrutiny because the alternative (continued rent liability with no occupancy) is punitive to the tenant.
Frequently Asked Questions
How long can the landlord take to respond to a consent request?
The RTA does not specify a deadline. RTDRS practice suggests 7 to 14 days after the tenant provides complete information about the proposed subtenant is reasonable. Longer delays without justification support an argument of unreasonable withholding.
Can I charge for the tenant screening on a proposed subtenant?
You can charge a reasonable administrative fee (typical range $50 to $150) to cover credit check and screening costs. Larger amounts risk being ruled unreasonable and may support the tenant's argument that consent is effectively being withheld.
What if the proposed subtenant fails my credit check?
Refusing based on failed screening is generally reasonable, provided you apply the same standards you would apply to any new tenant. Document the specific screening failure (credit score below threshold, insufficient income, poor previous landlord reference) in your written refusal.
Does the original tenant get their deposit back on assignment?
Not typically. The deposit remains with the landlord and is transferred as an obligation to the assignee. The assignee typically pays the original tenant an equivalent deposit amount as part of the assignment transaction, or the original tenant remains at risk of deposit deductions when the assignee ultimately vacates. The mechanics depend on the assignment agreement's terms.
Does UrbanLease process sublet and assignment consent requests?
Yes. UrbanLease screens the proposed subtenant or assignee using the same criteria applied to new tenants, drafts the consent or assignment document, and coordinates the effective date. Property management services provided by PREP Realty, a RECA-licensed Alberta brokerage.
Bottom Line
Alberta's sublet and assignment framework balances tenant flexibility with landlord protection through the 'consent cannot be unreasonably withheld' standard. Landlords who apply consistent screening, respond promptly, and document reasoning defend their positions successfully at RTDRS. Landlords who refuse without reason or apply differential standards typically lose. Assignment is often the appropriate mechanism for a tenant needing to exit a fixed-term lease early; refusing reasonable assignment often leaves the landlord worse off (empty unit, RTDRS complaint) than consenting. UrbanLease processes these requests routinely under PREP Realty.