A subordination, non-disturbance and attornment agreement—commonly called an SNDA—coordinates a tenant's leasehold interest with a landlord lender's security and enforcement position. The acronym is not a standard outcome. The lease, title, mortgage, lender requirements, standalone agreement and transaction facts determine what each party gives, receives and must do. Counsel should negotiate and interpret the document; the commercial team should expose the operating, income and timing consequences.
This is general information, not legal, tax, environmental, engineering, accounting or investment advice. Obtain advice specific to the property and transaction.
1. Separate the three contractual ideas
Subordination addresses the relative position the tenant agrees its leasehold interest will take against identified lender security. Non-disturbance addresses the circumstances in which a lender or successor agrees not to disturb the tenant's possession. Attornment addresses the tenant's agreement to recognize and perform for a successor landlord after an enforcement or transfer event.
Those plain-language descriptions do not determine legal priority or enforceability. Review the actual title, registrations, lease and proposed agreement with Alberta counsel.
- Subordination
- Non-disturbance
- Attornment
- Affected mortgage
- Protected lease
- Triggering event
2. Build the record before negotiating the acronym
Obtain the current fee-simple title, relevant mortgages and caveats, complete lease and amendments, assignments, estoppels, notices, defaults and any existing recognition or priority agreement. Identify whether the lease or a caveat is registered and when each interest entered the title record.
The Alberta land-title system records ownership and registered interests, but the current title alone does not reproduce every contract term. Order the underlying instruments and reconcile them to the controlled lease file.
3. Compare automatic lease wording with a delivered agreement
A lease may state that it is automatically subordinate, require a later agreement, make subordination conditional on non-disturbance or require the landlord to use stated efforts to obtain lender recognition. These are materially different commitments.
Record who must request the document, the form standard, response time, permitted lender changes, condition for effectiveness and consequence if the lender does not sign. A landlord promise to request an agreement is not the same as a lender-delivered covenant.
4. Define the tenant continuity case
The tenant should identify which premises, term, renewal options, exclusivity rights, signage, parking, access, casualty rights, restoration obligations, deposits, prepaid rent and landlord work matter to business continuity.
Counsel should determine the defaults, notices, cure periods, enforcement events, exceptions and tenant performance conditions attached to non-disturbance. The word itself is not an unconditional guarantee of occupancy.
- Premises and access
- Remaining term and options
- Tenant defaults
- Landlord obligations
- Casualty and restoration
- Deposits and prepaid amounts
5. Define the lender recognition case
A lender may require rent and notices after enforcement, attornment, confirmation of the lease record, restrictions on amendment or surrender, cure rights and limits on obligations it did not assume. The tenant and landlord should understand how those terms change administration before any enforcement event.
A lender's recognition of the lease does not automatically make it responsible for every prior landlord default, deposit, inducement, construction obligation or prepaid amount. The document must state the allocation.
6. Protect the landlord's financing and leasing process
The landlord should identify existing lender requirements, future-financing flexibility, material-lease thresholds, approval rights, delivery deadlines and the forms promised to tenants. Inconsistent lease promises can delay financing or create competing obligations.
Maintain a matrix of each tenant's subordination language, non-disturbance rights, estoppel requirements, notice addresses, lender forms and outstanding signatures. Do not wait for a financing deadline to discover bespoke lease rights.
7. Keep estoppel and SNDA workstreams distinct
An estoppel certificate generally records current statements about the lease relationship for reliance by another party. An SNDA allocates priority, recognition and performance rights among tenant, landlord and lender. One should not be treated as an automatic substitute for the other.
Reconcile both documents to the lease before signature. Conflicts involving term, defaults, deposits, options, rent, amendments or notices should be escalated rather than cured through an unsupported certificate.
8. Integrate sale, refinancing and acquisition diligence
For a property sale or refinancing, schedule each lease, registered interest, estoppel, SNDA, lender consent, notice, security deposit and landlord obligation. Identify what must be delivered before conditions, funding or closing and who can approve exceptions.
Buyers should distinguish a tenant's contractual agreement to attorn from proof that every lease right and landlord obligation will continue unchanged. Lenders and counsel control their own reliance and recognition decisions.
9. Control notices, cure and operational handover
Map notice recipients, delivery methods, lender cure rights, rent directions, management changes, insurance, maintenance requests and emergency contacts. An enforcement event can change who performs landlord functions before the tenant's operations change physically.
Test the process against a real scenario: whom does the tenant pay, who can approve alterations, who holds deposits, who must cure a landlord default and what evidence authorizes the change?
10. Keep advice and brokerage roles clear
Commercially can coordinate the title, lease, financing and property-information workstreams and help parties identify missing evidence. It does not determine priority, draft an SNDA, advise a party to subordinate or represent that a lender will preserve a lease.
Use current Alberta legal counsel for the lease, title and lender documents. The Law Society directory can verify practising status and help locate counsel without endorsing a particular lawyer.
Primary sources
Verify the current rules.
Government and regulator pages can change. These links were reviewed on August 26, 2026.
Alberta Land Registry: Caveats↗Alberta Land Registry: What is a land title?↗Alberta Land Registry: Leases procedure LEA-1↗Alberta: Land Titles procedures manual↗Alberta Land Registry: Land titles and surveys forms↗Alberta Land Registry: Search registered documents↗RECA: Property ownership and title-search due diligence↗Law Society of Alberta: Find a lawyer↗A real property decision?
Share the property, lease and transaction stage. Title, lender and legal conclusions remain with the appropriate professionals.Who, how and why
Who: Commercially Research & Editorial.
How: Primary-source research and AI-assisted drafting were used to organize this guide around a practical commercial real estate decision. Source links, factual claims and material limitations were checked against Commercially's editorial standards on the review date.
Why: To help owners, buyers and tenants identify the records, questions and professional advice that belong in a real transaction work plan.
Editorial owner: Commercially Research & Editorial.
Commercial review: Slav Loban, Commercial Real Estate Division Leader.
Questions or corrections: hello@commercially.ca
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