Some lease clauses decide what happens while everything goes right. Others decide what happens when something goes wrong — when the building is sold, the landlord defaults, or the practice hits a rough patch. These are the clauses tenants skim past, and they are exactly the ones that determine whether an expensive buildout and a hard-won location survive a shock.
Our companion guide covered the protections that keep competitors away and secure your future — exclusivity, renewal options, and right of first refusal. This one covers the transactional fine print: the estoppel certificate, the SNDA, the personal guaranty, and the force majeure clause.
This guide covers:
- The estoppel certificate — and how it can quietly cost you
- The SNDA — the clause that protects your lease in a foreclosure
- The personal guaranty — and how to limit personal risk
- Force majeure — what it does and does not excuse
- When each one matters and how to negotiate it
The Estoppel Certificate: Sign Carefully
An estoppel certificate is a signed statement confirming the current status of your lease — rent, term, deposit, any outstanding landlord obligations, and whether either party is in default. Landlords request them when selling or refinancing, because a buyer or lender relies on the tenant's confirmation of what they are acquiring.
The risk is subtle. Once you sign, you are legally prevented from later contradicting what the certificate says. If the draft omits a tenant improvement allowance the landlord still owes you, or misstates a disputed charge, signing can waive your claim. Most leases require you to return an estoppel within a set number of days, so this is not a document to rush.
Before signing: compare every statement against your actual lease, confirm any allowances or credits still owed are reflected, and involve counsel if anything is inaccurate. Confirm only what is true. A useful habit is to keep a running file of the lease, all amendments, and any outstanding landlord obligations, so that when an estoppel request arrives — often on a tight deadline during someone else's transaction — you can verify it quickly rather than signing under time pressure.
The SNDA: Protection If the Landlord Defaults
Here is a risk most tenants never consider: what happens to your lease if your landlord defaults on their mortgage and the lender forecloses? Without protection, the foreclosure can extinguish your lease entirely — and force your practice out of a space you spent six figures building.
The SNDA — Subordination, Non-Disturbance and Attornment — resolves this. Its three parts:
- Subordination: you agree your lease sits behind the lender's mortgage in priority.
- Non-disturbance: in return, the lender agrees that as long as you are not in default, you may stay in your space under your existing lease even after foreclosure. This is the protection that matters.
- Attornment: you agree to recognize the lender or new owner as your landlord if that happens.
For a practice with an expensive buildout and a location-bound patient base, the non-disturbance clause is essential. Request an SNDA at lease signing, especially for a long-term or build-to-suit space. It is far harder to obtain after the fact — and worthless once a foreclosure is already underway. If the landlord's lender will not sign an SNDA at all, that is itself information worth having before you commit a large buildout to the space.
The Personal Guaranty: Limit Your Exposure
A personal guaranty makes you personally liable for the lease. If the practice defaults, the landlord can pursue your personal assets — home, savings, investments — not just the business. Landlords often require one, especially from newer or single-owner practices, and the exposure can far exceed the value of the business itself.
You rarely have to accept an unlimited guaranty. Common ways to limit it:
- "Good guy" guaranty: caps your personal liability to the period before you properly vacate and surrender the space, rather than the full term.
- Burn-off provision: releases the guaranty after a track record of on-time payments — say, three years.
- Capped guaranty: limits liability to a fixed dollar amount rather than the whole lease.
For an owner weighing a long lease with a heavy buildout, negotiating the scope and duration of the guaranty is as important as negotiating rent — it defines how much personal risk the whole decision carries. Note how it interacts with your exit rights: if you negotiate an assignment or sublease right, make sure the guaranty does not survive in a way that traps you after you have handed the space to a qualified replacement.
Force Majeure: Know What It Does Not Cover
A force majeure clause excuses a party from its obligations when extraordinary events beyond its control — natural disasters, government orders, emergencies — make performance impossible. After the COVID-19 period, many leases now address pandemics and mandated closures directly.
The critical detail: most force majeure clauses explicitly carve out rent. That means the clause may extend your construction deadlines or excuse other obligations during an event, but you still owe rent. Read exactly which events are covered, whether obligations are suspended or terminated, and whether any rent relief exists. Where possible, negotiate abatement provisions for genuine, prolonged disruptions. This is standard due diligence before signing.
Why Landlords Include These Clauses
Understanding the landlord's side makes each of these easier to negotiate. A personal guaranty exists because the landlord is funding a buildout and taking leasing risk on a business that may be young; the guaranty is their security. An estoppel exists because their buyer or lender needs certainty about the lease. Subordination exists because their own lender demands priority. Seen this way, none of these clauses is hostile — each solves a real problem for the landlord. The tenant's job is not to eliminate them but to add the balancing protections: non-disturbance in exchange for subordination, a burn-off in exchange for a guaranty, accuracy in an estoppel. Framing your asks as fair trades rather than demands is what gets them agreed.
When Each One Matters
These clauses are negotiated at different moments, but all are far easier to secure at the letter of intent and lease-drafting stage than later:
- SNDA and personal guaranty: negotiate at signing. Both are nearly impossible to improve afterward.
- Force majeure: negotiate at drafting, when the language is still open.
- Estoppel: handle carefully whenever requested, typically years into the lease during a sale or refinance.
For the broader exit toolkit these clauses connect to — sublease, assignment, early termination — see our commercial lease exit strategies guide, and for how the LOI sets the stage for all of it, LOI vs. commercial lease.
Plus CRE negotiates on the tenant side only. Our lease negotiation and tenant representation work for healthcare providers and dentists is built around exactly this fine print — because the rent makes the headline, but these clauses decide what happens when something breaks. Talk to us before your LOI goes out.
A Simple Pre-Signing Checklist
Before you sign any commercial lease, confirm each of these is addressed — not perfectly in your favor, but consciously negotiated rather than accepted by default:
- An SNDA with a non-disturbance clause is included, or the landlord agrees to obtain one from its lender.
- Any personal guaranty is limited — good-guy, burn-off, or capped — not open-ended for the full term.
- The force majeure clause is read for what it excuses, and rent abatement is negotiated where possible.
- You understand your estoppel obligation and the timeframe for responding, so a future request does not catch you unprepared.
- These sit alongside the offensive protections — exclusivity, renewal options, right of first refusal — as one negotiated package, not afterthoughts.
None of this requires an adversarial posture. It requires knowing the clauses exist and raising them at the right moment, while the landlord is still competing for your tenancy.
Frequently Asked Questions
What is an estoppel certificate and why am I being asked to sign one?
It is a signed statement confirming your lease's current terms and status, requested when the building is sold or refinanced so a buyer or lender can verify what they are acquiring. Review it carefully — once signed, you cannot contradict it, so an error can waive a claim like an unpaid allowance.
What does an SNDA protect me from?
It protects your lease if your landlord defaults on their mortgage and the lender forecloses. The non-disturbance part lets you remain in your space under your existing lease, as long as you are not in default. Without it, a foreclosure can void your lease and force you out.
Can I avoid signing a personal guaranty?
Sometimes, but landlords often require one, especially from newer practices. More realistic than avoiding it is limiting it — through a "good guy" guaranty, a burn-off after a payment history, or a dollar cap. Negotiating its scope is as important as negotiating rent.
Does a force majeure clause mean I can stop paying rent during an emergency?
Usually not. Most force majeure clauses explicitly carve out rent, so you keep paying even when an event disrupts your business. The clause may excuse other obligations or extend deadlines. Read the specific language and negotiate rent abatement where you can.
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