Why You Need an Estoppel Certificate Before Buying Tenanted Commercial Property
The seller says “the tenant pays $10K a month with five years left.” But the truth has to be confirmed by the tenant, in writing. An estoppel is that can’t-take-it-back confirmation.
What is an estoppel certificate, and why do you need one to buy tenanted commercial property?
An estoppel certificate is a written statement signed by the tenant confirming the real terms of their lease — the rent, the term, deposits, whether there’s any current default or arrears, and whether any side agreement or verbal promise the seller didn’t mention exists. The buyer and lender rely on it; once the tenant signs, they’re “estopped” from later claiming terms that differ. Buying tenanted commercial property, the estoppel is how you verify that the “lease the seller describes” equals the “actual lease.”
Source: Ontario commercial acquisition / lease due-diligence practice (2026)
I’m Arthur Zhao. Buy a tenanted commercial building and you’re not just buying brick — you’re buying the income stream. But the truth of that income isn’t what the seller says out loud; he’ll tell you it’s “fully leased with stable tenants.” What you can actually rely on is a signed estoppel certificate from each tenant, confirming the lease details in writing. Skip this step and you can inherit a stack of leases that look nothing like the seller’s description.
→
→
→
→
Read the rent roll — but don’t just trust it
⚠️Make “receiving signed estoppel certificates from all major tenants” a condition of closing, not something you chase afterward. If a major tenant refuses to sign, or the signed version contradicts the seller’s description, you want the right to renegotiate the price or walk before closing. Discovering it afterward is too late.
Estoppel: the tenant confirms the truth of the lease
SNDA: the three-way understanding lenders want
💡 The estoppel earns its keep by exposing “concessions the seller didn’t mention” — for example, a seller who, to dress the property up as fully leased and high-yield, quietly gave a tenant six months free or promised an unpaid improvement allowance. You won’t see those on the rent roll, but they surface in the tenant-signed estoppel — and they directly change the price you should pay.
Due diligence goes beyond the estoppel
For tenanted commercial property, estoppels and SNDAs are core, but full lease due diligence also means: reading each original lease (not a summary), verifying actual arrears, checking every lease’s renewal / right of first refusal / early-termination rights, and confirming the rolling distribution of lease expiries (will they bunch up and create vacancy risk?). These matter as much as the environmental and structural diligence on the building itself — you’re buying its cash flow, after all.
Frequently Asked Questions
What’s the difference between an estoppel certificate and a rent roll?
A rent roll is the seller’s own tenant list, which can be stale or omit concessions. An estoppel certificate is the tenant’s own signed confirmation of the lease truth, which the buyer and lender rely on and the tenant can’t later contradict. The first is a starting point; the second is verification you can trust.
What is an SNDA, and why does the lender want it?
SNDA = Subordination (lease subordinate to the mortgage) + Non-Disturbance (a non-defaulting tenant isn’t disturbed) + Attornment (the tenant recognizes the new owner and keeps paying). It settles the lender-buyer-tenant relationship before the deal — a standard requirement when financing tenanted commercial property.
What if a tenant refuses to sign an estoppel?
That itself is a warning sign. Make signed estoppels from major tenants a condition of closing: if one refuses, or the returned content contradicts the seller’s description, you want the right to renegotiate or walk. Don’t close blind when a major tenant’s lease truth is unconfirmed.
Is the estoppel alone enough due diligence for tenanted property?
No. Also read each original lease, verify actual arrears, check renewal / right of first refusal / early-termination rights, review the rolling distribution of lease expiries (to avoid bunched-up vacancy risk), plus the building’s environmental and structural diligence. The estoppel is a core piece, not the whole.
What seller ‘dress-up’ can an estoppel expose?
Most typically, undisclosed concessions: a quiet free-rent period, a promised-but-unpaid improvement allowance, verbal rent reductions — none visible on the rent roll, but surfaced in the tenant-signed estoppel, directly affecting the property’s real yield and the price you should pay.
Arthur Zhao
Real Estate Broker · FRI · ABR · SRS · PSA · MCNE · E-PRO · CLHMS & GUILD Elite · REAIS
VP & Branch Manager, Bay Street Group Inc.
Get expert answers on buying, selling, and renting in the GTA
Discover more from GTA Real Estate Broker | Arthur Zhao
Subscribe to get the latest posts sent to your email.
