What Is an SNDA Agreement, and Why Do Lenders Ask for One?

Why the lease needs protecting from the mortgage

Without an SNDA, a mortgage recorded after a lease is signed still generally outranks it if the loan documents say so, or the mortgage may already outrank the lease if it was recorded first. If the lender forecloses, an unprotected tenant's lease can be wiped out along with everything else junior to the mortgage, leaving the tenant with no right to stay even though it did nothing wrong. That is the exact outcome non-disturbance exists to prevent, and it is also the outcome the lender does not want either: a shopping center that loses its paying tenants the moment the lender takes it back is worth far less as collateral.

The three pieces work together rather than separately. Subordination gives the lender priority so the loan is properly secured. Non-disturbance gives the tenant assurance that a foreclosure will not end its occupancy. Attornment gives the lender, or a foreclosure buyer, a tenant who is contractually bound to keep paying rent to the new owner without a gap or a renegotiation.

What each piece actually commits the parties to

Subordination is usually the shortest section and the one tenants push back on least, since most leases already require it as a condition of occupancy. It states that the lease, and the tenant's rights under it, are subject to the lien of the mortgage and any renewals, extensions, or refinancings of that mortgage.

Non-disturbance is where a tenant's counsel focuses, because it defines the conditions under which the tenant keeps its space. A well negotiated non-disturbance clause preserves the lease on its existing terms, including any renewal options and rent that was already fixed, and it should not let a foreclosing lender evict a compliant tenant just because the landlord defaulted on the loan. What it typically does not preserve is the prior landlord's unfulfilled promises, like an unpaid tenant improvement allowance or a construction obligation the original landlord never completed, unless the tenant specifically negotiates for the lender to assume those too.

Attornment is the tenant's reciprocal obligation, and it usually comes with a practical mechanic: on written notice from the lender or a foreclosure buyer, the tenant automatically attorns and begins paying rent to the new owner, with no need for a new lease to be signed.

Where the landlord's role actually sits

Getting an SNDA signed is the landlord's job, not the tenant's or the lender's. Most commercial leases already include a clause obligating the tenant to execute an SNDA on request, in a commercially reasonable form, which is what gives the landlord the contractual footing to ask. When a lender requires SNDAs as a condition of financing or refinancing, the landlord is the one who sends the form to each tenant, tracks who has signed, and follows up on the ones who have not.

That tracking matters because a slow tenant can hold up a closing the same way a slow estoppel response can. A landlord going into a refinance benefits from knowing, tenant by tenant, whether the current lease already obligates an SNDA on request, whether that obligation was ever exercised, and whether any signed SNDA on file actually matches the current amendment chain rather than an earlier version of the lease.

How it differs from an estoppel certificate

An SNDA and an estoppel certificate often travel together in a lender's diligence request, and it is easy to conflate them because both involve getting a signed document from every tenant before a financing or sale closes. They do different work. An estoppel certificate is the tenant confirming what the current lease terms are, rent, term, defaults, side agreements, so the lender can trust the rent roll. An SNDA is a forward looking agreement about what happens to the lease relationship if the lender ever has to foreclose. A lender can reasonably require both, and a landlord managing either one benefits from the same underlying discipline: know what each lease actually says and who still needs to sign.

This is general information about how SNDA agreements typically work, not legal advice. What a specific non-disturbance clause protects, whether a proposed SNDA form is commercially reasonable under a given lease, and what a landlord should negotiate on a tenant's behalf are questions that turn on the lease's exact language and the lender's requirements, and they belong with counsel where the stakes are real.

Common questions