If you own a commercial building in California and plan to sell or refinance it, a buyer or lender will demand estoppel certificates from your tenants before the deal closes. Property owners who treat the estoppel as a routine formality often learn the hard way that a single tenant’s answer can delay a closing, cut the sale price, or expose a side agreement the owner forgot about. An estoppel certificate commercial lease process is one of the few tools that lets you lock down the true state of your leases before a third party relies on them.
Key Takeaway: An estoppel certificate is a signed statement in which a tenant confirms the key terms of its lease, such as the rent, term, deposit, and whether the landlord is in default, for a buyer or lender who relies on it. Under California Evidence Code sections 622 and 623, the signer is bound by what it certifies and cannot later contradict it, which is what makes the document so valuable in a sale or refinance.
What is an estoppel certificate in a commercial lease?
An estoppel certificate is a written statement, usually signed by the tenant, that confirms the current facts of a lease for a third party. The name comes from the legal doctrine of estoppel: once a tenant certifies a fact and a buyer or lender relies on it, the tenant is estopped, or barred, from later claiming something different.
The tenant is the party who usually signs, because the buyer or lender wants the tenant’s confirmation rather than the landlord’s word. The landlord typically drafts the form and sends it to each tenant during the due diligence period. Landlords are sometimes asked to sign their own estoppel to a lender as well, confirming the lease facts from the owner’s side.
Why do California landlords need estoppel certificates?
You need estoppels because no sophisticated buyer or lender will close without them. When you sell a leased commercial building, the buyer is really buying the income stream, and the estoppel is how the buyer verifies that stream is what you represented. A lender refinancing the property does the same thing before committing funds.
The smart move is to require estoppel delivery as a covenant in the lease itself. A well-drafted commercial lease obligates the tenant to return a signed estoppel within a set period, often ten days, and includes a deemed-approved provision so the tenant’s silence counts as confirmation. In our experience advising owners, the landlords who build that clause into every lease can produce clean estoppels on demand, while the ones who did not spend the closing period chasing signatures from tenants who have no obligation to cooperate. Our lease drafting and review practice puts that clause in before it is ever needed.
How does California law make an estoppel certificate binding?
Two Evidence Code provisions give the estoppel its force. Section 622 provides that the facts recited in a written instrument are conclusively presumed true between the parties to it. Section 623 codifies equitable estoppel: a party who intentionally leads another to believe a fact, and to act on that belief, cannot contradict it later. Together they mean a tenant who certifies that the rent is current and the landlord is not in default cannot turn around after the sale and sue the new owner over a defect it failed to disclose.
Commercial leases can go further than residential ones. Because commercial tenancies are not subject to the consumer protections that limit residential landlords, a commercial lease can enforce a deemed-approved estoppel clause, where a tenant that fails to respond within the deadline is treated as having confirmed the landlord’s version. That mechanism is generally enforceable in a negotiated commercial lease and gives the owner a reliable path to a clean estoppel even from an uncooperative tenant.
What is a dirty estoppel, and how do owners handle it?
A dirty estoppel is one that comes back with a problem written into it: a claimed landlord default, an alleged rent offset, an unrecorded side agreement, a disputed operating-expense charge, or an option the owner did not disclose. Once it is in the buyer’s hands, the buyer will use it to renegotiate the price or walk.
The strategic value of the estoppel is that it surfaces these problems while you still control them. In our experience, the owners who review returned estoppels themselves, before forwarding them to the buyer, are the ones who keep deals alive. If a tenant asserts a $40,000 offset for unfinished tenant improvements, you want to resolve or document that with the tenant first, not discover it across the closing table. If the estoppel reveals a tenant already in default, addressing the default early, sometimes through our Los Angeles eviction attorney team, is far better than handing the buyer a leverage point.
What should a commercial estoppel certificate include?
A useful estoppel certificate pins down every fact a buyer or lender needs to verify. Leaving items vague defeats the purpose, and asking the tenant to certify facts it cannot know invites objections. The form should be specific and limited to what the tenant can confirm from its own records.
Buyers negotiate the form. Lenders mostly do not. A loan committee will tolerate a knowledge qualifier on housekeeping items, and it will refuse one on rent, deposit, term, options, or the no-default confirmation, because those are the facts the loan is underwritten against. The third column below is where owners should expect no flexibility, including on any recorded commercial purchase option that could strip the lender of its collateral.
| Item to certify | Why it matters to a buyer or lender | What a lender will not let the tenant qualify |
|---|---|---|
| Parties, premises, and lease date, plus all amendments | Confirms the complete lease and that no side agreements exist | Every amendment listed by date, with no “to tenant’s knowledge” hedge |
| Current base rent and next scheduled increase | Verifies the income stream being purchased or financed | Rent stated as a dollar figure, not confirmed “as set forth in the lease” |
| Security deposit and any prepaid rent held | Establishes what the buyer must credit or assume at closing | An exact amount, because the lender adjusts loan proceeds against it |
| Commencement, expiration, and renewal or extension options | Confirms the term and any options that affect value | Every renewal, expansion, purchase option, and right of first refusal identified or expressly denied |
| No landlord default and no tenant offset or claim | Bars the tenant from later asserting an undisclosed dispute | Almost never waived and never qualified; this is the clause the loan committee reads first |
| No unpaid tenant-improvement or free-rent obligations | Confirms the landlord owes the tenant nothing that transfers to the buyer | Any unfunded allowance quantified, because the lender will escrow it |
Coordinating the estoppel with the sale documents matters as much as the form itself. The estoppel, the assignment of leases, and any subordination and non-disturbance agreement with the lender all have to line up. Our California commercial lease agreement guidance and our commercial transaction attorneys keep those documents consistent so the deal does not stall on a mismatch.
How do you enforce a deemed-approved estoppel clause when a tenant stalls?
You enforce it by documenting the request, letting the contractual deadline run, and then treating the silence as the certification the lease says it is. A deemed-approved clause converts non-response into confirmation, and that mechanism is generally enforceable in a negotiated California commercial lease. Commercial tenants have no rent control and no AB 1482 just-cause protection, and the same freedom of contract that lets an owner shift taxes, insurance, and maintenance under a triple net lease supports a self-executing estoppel deadline.
Build the record so the deemed approval holds up. Serve the request exactly the way the lease notice provision requires, attach the form with every fact already filled in, state the deadline and the consequence in the cover letter, and keep proof of delivery. A deemed-approved clause is worth nothing if the owner cannot prove the tenant received the request.
Refusal is a different problem from silence. A tenant that affirmatively refuses to sign is in breach of a lease covenant, and the owner’s options include a three-day notice to perform covenants or quit under Code of Civil Procedure section 1161(3), a suit for specific performance, and damages for the repricing or loss of the transaction. In our experience the notice usually ends the standoff, because a tenant sitting on a below-market rent with four years of term left has far more to lose from an unlawful detainer than from signing a certificate that repeats what the lease already says.
How do estoppel certificates work with an SNDA and the lender’s diligence timeline?
The estoppel and the subordination, non-disturbance, and attornment agreement do two different jobs, and a lender wants both. The estoppel fixes the present facts of the lease. The SNDA sets the future relationship: the lease goes behind the deed of trust, the lender agrees not to disturb a tenant that is not in default, and the tenant agrees to recognize the lender or a foreclosure purchaser as its landlord. A lender holding estoppels but no SNDA has verified the income without securing it.
Timing is where owners lose control. Commercial loan commitments and purchase and sale agreements typically run a 30 to 45 day diligence period, and the lender will not clear conditions until it holds estoppels from the tenants carrying the income. On a multi-tenant building that usually means every tenant above roughly 10 percent of the rent roll, and often every tenant over 5,000 square feet, not just the anchor. Send the requests the day the agreement is signed.
| Stage | Owner’s task | Typical window |
|---|---|---|
| Agreement signed or loan application submitted | Send the estoppel and SNDA forms to every required tenant using the lease notice method | Days 1 to 3 |
| Lease response period runs | Track the ten business day return deadline and the deemed-approval date for each tenant | Days 3 to 17 |
| Owner review | Compare every returned certificate against the lease file, the amendments, and the rent roll | Days 17 to 22 |
| Issue resolution | Resolve claimed offsets, side letters, and unfunded improvement obligations, and paper the fix | Days 22 to 30 |
| Delivery | Forward the clean package to lender counsel, buyer counsel, and title | Before diligence expires |
| Closing | Estoppels attach to the assignment of leases; the SNDA records with the deed of trust | Closing |
What happens when the estoppel contradicts the lease or the rent roll?
The estoppel controls as against the tenant, and the seller absorbs the difference as against the buyer. Once the buyer or lender relies on the certificate, Evidence Code section 622 binds the tenant to the facts it recited, subject to the statute’s exception for recitals of consideration, and section 623 bars it from acting inconsistently with the belief it created. That protects the buyer from the tenant. It does not protect the seller from the buyer.
Owners consistently miss that second half. A certificate fixing rent at $9,400 a month when the rent roll delivered in diligence said $9,900 does not quietly correct the rent roll, it proves the representation was wrong. The buyer sues on the lease representations in the purchase agreement, not on the estoppel, and a $500 monthly variance capitalized at a 7 percent rate is roughly $85,000 of value the buyer will demand at closing as a price reduction or an escrow holdback.
An estoppel also cannot manufacture a lease term that never existed. A tenant who certifies a renewal option the lease does not contain has not created one, and the buyer takes the leases as written. Reconcile every returned certificate against the executed lease, each amendment, and any side letter before it leaves your office, then correct the rent roll rather than let escrow find the gap.
Do estoppel certificates need to be notarized?
No. A commercial estoppel certificate is signed by the tenant but is not notarized or recorded in the ordinary case, because it is a private confirmation to the buyer or lender rather than a document that goes into the public record. It takes effect on delivery and reliance, not on recording. A subordination agreement tied to the financing may be recorded and acknowledged, but the estoppel itself usually is not. If a lender asks for an acknowledged signature, that is a lender preference, not a legal requirement.
Frequently asked questions about commercial estoppel certificates in California
Who fills out an estoppel certificate?
The landlord usually drafts the form, and the tenant completes and signs it. The tenant certifies the lease facts because the buyer or lender wants confirmation from the party who actually occupies the space, not just the owner’s representation.
What is a dirty estoppel?
A dirty estoppel is one that discloses a problem, such as a claimed landlord default, a rent offset, an undisclosed side deal, or a disputed charge. It can reduce the sale price or derail the transaction, which is why owners should review returned estoppels before the buyer sees them.
Do estoppel certificates need to be notarized?
Generally no. A commercial estoppel certificate is signed but not notarized or recorded, because it is a private confirmation relied on by a buyer or lender. It takes legal effect on delivery and reliance.
Can a commercial tenant refuse to sign an estoppel certificate?
If the lease requires it, refusing is a breach. Well-drafted commercial leases obligate the tenant to return an estoppel within a set period and often include a deemed-approved clause, so a tenant that ignores the request can be treated as having confirmed the landlord’s statement.
Is an estoppel certificate legally binding in California?
Yes. Under California Evidence Code sections 622 and 623, a party is bound by the facts it certifies once a buyer or lender relies on them, and cannot later contradict the certificate. That binding effect is the reason estoppels are required in almost every commercial sale and refinance.
How long does a tenant have to return an estoppel certificate?
It depends on the lease. Many commercial leases require return within ten business days of the request, and some include a shorter deemed-approved deadline. If the lease is silent, the tenant has no fixed deadline, which is exactly why the clause belongs in every lease.
Talk to a California commercial real estate attorney
Whether an estoppel protects a sale or blows one up depends on how your leases are drafted and how the returned certificates are handled. Borna Houman Law drafts enforceable estoppel and deemed-approved clauses, reviews returned estoppels before they reach a buyer, and coordinates the estoppels with your sale and financing documents. Our commercial lease attorneys handle the full transaction. Call (888) 42-BORNA to schedule a confidential consultation.
This article is general information about California law and is not legal advice. Consult an attorney about your specific situation. For the legal basis of estoppel, see California Evidence Code section 622 and Evidence Code section 623.
