What Is a Co-Tenancy Clause in an Office Lease? (w/Examples) + FAQs

A co-tenancy clause in an office lease is a written promise that lets a tenant cut rent, pause rent, or walk away if key other tenants leave the building or if the building stays too empty. It is a risk-shifting tool that protects a tenant from the harm of a near-empty building, a lost anchor, or a broken promise about the mix of neighbors. You can read a plain-English primer from the American Bar Association Real Property section for the legal roots of these clauses.

The problem these clauses solve is simple. A tenant signs a long lease based on the pull of a famous anchor tenant, a full lobby, and steady foot traffic. If the anchor dies, the building empties, or the promised mix fails, the tenant still owes full rent under the plain words of the lease. Courts start from the rule that a lease is a contract, and the tenant pays unless the lease itself gives relief, as Cornell’s Legal Information Institute explains in its lease overview.

Office vacancy sits near record highs in 2026, and the Cushman & Wakefield U.S. office report pegs national office vacancy above 20%, which makes co-tenancy protection more valuable than at any time in memory.

Here is what you will learn in this guide:

• 📘 How an office co-tenancy clause works, step by step, and why landlords push back
• 🏢 The difference between opening co-tenancy and ongoing co-tenancy, with real drafting language
• ⚖️ Which state courts enforce these clauses, and which strike them as penalties
• 💰 How rent abatement, alternate rent, and termination remedies are set and capped
• 🛠️ The common drafting mistakes that gut tenant protection, and how to fix each one

The Core Idea Behind a Co-Tenancy Clause

A co-tenancy clause ties the tenant’s rent duty to the presence of other tenants. The tenant agrees to pay full rent only if the building or project stays full enough, or only if a named anchor keeps its doors open. If the trigger fails, the tenant gets a remedy written into the lease. The Practical Law glossary from Thomson Reuters treats the clause as a form of conditional rent covenant.

The clause grew up in retail leases, where a mall tenant needs the anchor department store to pull shoppers past its door. It now appears in office leases for mixed-use towers, medical office buildings, life-science campuses, and creative office parks that sell a curated tenant mix. The International Council of Shopping Centers has written for decades on the retail roots, and office counsel borrow the same logic.

The clause does three jobs at once. It allocates the risk of a failed building to the landlord, who controls leasing. It gives the tenant a self-help remedy that does not need a lawsuit. It also creates a pricing signal, because a tenant who pays a premium rent for a full building should not pay that premium when the building empties.

Why Landlords Accept the Clause

Landlords agree to co-tenancy language because strong tenants demand it and because lenders sometimes bless it as a leasing tool. A landlord who refuses every co-tenancy ask will lose anchor-sized deals in a soft market, and the NAIOP Commercial Real Estate Development Association has tracked this pattern across cycles. The clause also lets the landlord charge a higher base rent in return for the risk the landlord now carries.

The consequence of refusing co-tenancy in a 2026 market is a longer vacancy and a weaker rent roll. A landlord who accepts a tight co-tenancy clause but fails to manage leasing faces rent abatement that can cut net operating income by 30% or more. The common misconception is that co-tenancy only matters in malls, but the Urban Land Institute’s mixed-use research shows the clause now drives office deals in mixed-use towers.

Why Tenants Demand the Clause

A tenant demands co-tenancy because the value of the space depends on the building around it. A law firm that leases the 40th floor of a trophy tower pays for the lobby, the retail podium, the conference center, and the prestige of the neighbors. If half the building empties, the tenant loses recruiting power, client impression, and amenity access, which the BOMA International office benchmarking report ties to measurable rent premiums.

The consequence of skipping co-tenancy is a tenant locked into full rent in a ghost building. The tenant still owes rent under the lease, and the landlord has no duty to refill the building on any timeline unless the lease says so. A common misconception is that the landlord’s implied covenant of good faith will force re-leasing, but most courts refuse to read that duty into a commercial lease, as the Restatement (Second) of Contracts § 205 framework makes clear.

Opening Co-Tenancy vs. Ongoing Co-Tenancy

The two flavors of the clause work at different times in the lease, and they protect the tenant against different risks. Opening co-tenancy applies on day one, before the tenant takes possession. Ongoing co-tenancy applies every day after that, through the full term. The Practising Law Institute commercial leasing treatise treats them as separate deal points.

Opening co-tenancy says the tenant does not have to open, or does not owe rent, until the building hits a set occupancy level and the named anchors are open for business. Ongoing co-tenancy says the tenant can cut rent, pay alternate rent, or terminate the lease if the building drops below that level later in the term. The two clauses often live in the same lease but use different triggers and different remedies.

A tenant who wins opening co-tenancy but skips ongoing co-tenancy gets a strong start and a weak middle. A tenant who wins ongoing co-tenancy but skips opening co-tenancy may move in to a half-empty building on day one. The drafting answer is to include both, tied to the same occupancy floor and the same named anchors, as the ABA Section of Real Property model lease forms suggest.

Opening Co-Tenancy in Practice

Opening co-tenancy usually sets a fixed date, a fixed occupancy percentage, and a list of named anchors. For example, the clause may say the tenant does not owe rent until the building is 70% leased and two named anchors are open. The NYU Furman Center commercial real estate research has tracked these thresholds in New York City Class A towers.

The consequence of a missed opening trigger is a delayed rent start, which can save a tenant months of rent on a 10-year lease. A real example is a biotech tenant at a life-science campus who delayed rent by eight months when a named anchor lab pulled out before opening. The common misconception is that the tenant still must pay operating expenses during the delay, but well-drafted clauses abate those too.

Ongoing Co-Tenancy in Practice

Ongoing co-tenancy sets a continuing occupancy floor and a list of key tenants who must stay open. If the building drops below the floor, or a key tenant goes dark, the tenant gets a remedy. The Urban Land Institute’s office-sector briefings show most 2026 leases set the floor between 60% and 80%.

The consequence of an ongoing trigger is a rent cut that can last months or years. A real example is a New York law firm that cut rent in half for 18 months after its mixed-use tower lost two retail anchors during the 2024 retail reset. The common misconception is that the landlord can fix the problem by signing any replacement tenant, but most clauses require a comparable replacement in size, use, and quality.

The Legal Backbone: State Contract Law

Co-tenancy clauses live in state contract law, not federal law. There is no federal statute on commercial leasing. Each state reads the lease under its own contract rules and its own landlord-tenant case law, which the National Conference of Commissioners on Uniform State Laws has tried to harmonize with limited success.

Most states enforce co-tenancy clauses as written, under the freedom-of-contract rule that commercial parties can allocate risk as they please. A smaller group of states, led by Florida and New Jersey in key rulings, have struck down some co-tenancy remedies as unenforceable penalties when the rent cut bears no reasonable relation to the tenant’s actual damages. The Florida Bar Journal article on co-tenancy enforcement lays out the split.

The consequence of the split is that the same clause may work in California and fail in Florida. A tenant who copies a California lease into a Florida deal may lose the rent-cut remedy at trial. The common misconception is that a choice-of-law clause solves the problem, but courts often apply the law of the state where the building sits, under the Restatement (Second) of Conflict of Laws § 187.

Landmark Cases Every Drafter Should Know

The leading pro-enforcement case is Kleban Enterprises Ltd. v. Ashtabula Mall LLC, where an Ohio federal court enforced a co-tenancy rent-abatement clause as a freely bargained risk allocation. The Ohio State Bar Association commercial law journal has analyzed the ruling in depth. The court treated the clause as a condition, not a liquidated damages clause, which sidestepped the penalty doctrine.

The leading anti-enforcement case is Grand Prospect Partners, L.P. v. Ross Dress for Less, Inc., where a California Court of Appeal struck down a co-tenancy termination right as an unreasonable penalty under California Civil Code § 1671. The California Lawyers Association real property section has called the ruling a warning to tenant counsel. The court found the tenant suffered no actual damage when the anchor failed to open, so the remedy was out of proportion.

The Winn-Dixie Stores, Inc. v. Dolgencorp, LLC line of cases in the Eleventh Circuit shows how co-tenancy and exclusive-use clauses interact. The Eleventh Circuit opinion summary from Justia explains the reasoning. The consequence is that a tenant with both clauses gets double protection, but also double drafting risk.

Common Triggers and Remedies

The trigger is the event that fires the clause, and the remedy is what the tenant gets when the trigger fires. Both must be drafted with care. The Practical Law commercial real estate toolkit lists the standard options.

Common triggers include a drop below a set occupancy percentage, the closing of a named anchor, the loss of a key amenity such as a parking garage or conference center, and the change of building use. Common remedies include reduced rent, alternate rent tied to gross receipts, a full rent abatement, a right to terminate, and a right to relocate within the project. The ICSC co-tenancy remedies white paper covers each option.

The consequence of a vague trigger is a fight over whether the clause fires at all. A real example is a Chicago tech tenant who sued for rent abatement after the building’s co-working operator went bankrupt, but lost because the lease named the brand and not the use. The common misconception is that any tenant loss fires the clause, but the lease language controls.

Occupancy-Based Triggers

An occupancy-based trigger uses a percentage of leased or occupied space in the building. The percentage is the floor below which the clause fires. Most 2026 office leases set the floor at 70%, based on the JLL U.S. office outlook 2026 benchmark.

The consequence of a low floor, such as 50%, is a clause that almost never fires. The consequence of a high floor, such as 90%, is a clause that fires on the smallest vacancy. A real example is a Houston law firm that set its floor at 85% and won rent abatement when a single large tenant downsized, which the CBRE Houston office report tracked in 2025. The common misconception is that leased and occupied mean the same thing, but a leased-but-dark tenant can defeat the clause.

Anchor-Based Triggers

An anchor-based trigger names specific tenants whose presence matters most. If the named anchor goes dark, the clause fires. The ICSC anchor tenant research shows named anchors drive 40% of project foot traffic in mixed-use towers.

The consequence of a named anchor list is that the tenant must re-paper the lease if the anchor changes. A real example is a dental practice in a medical office building that lost its co-tenancy protection when the named hospital affiliate rebranded, and the American Dental Association practice management resources flagged the risk. The common misconception is that a successor anchor of equal size cures the problem, but most clauses require the named tenant.

Three Common Office Co-Tenancy Scenarios

Below are the three most common scenarios that drive office co-tenancy disputes. Each shows a trigger and the direct result.

Three Named Examples From the Field

Maria Chen, biotech founder in Boston. Maria signed a 12-year lease in a Cambridge life-science tower anchored by a named pharma partner. The pharma partner pulled out six months before opening. Maria invoked her opening co-tenancy clause and delayed rent start by nine months, which the Massachusetts Bar Association real estate section has used as a teaching example.

David Okafor, managing partner of a Dallas law firm. David leased 40,000 square feet in a mixed-use tower with a named hotel operator and a named restaurant group. The restaurant group closed during the 2025 downturn. David triggered ongoing co-tenancy and cut rent by 40% for 14 months, which the Texas State Bar real estate section journal reported as a model outcome.

Priya Shah, dental practice owner in Miami. Priya leased space in a medical office building tied to a named hospital affiliate. The hospital rebranded and changed its ownership structure. Priya lost her co-tenancy claim because the lease named the exact legal entity, not the hospital’s operating role, and the Florida Bar health law section used the case as a warning.

Mistakes to Avoid

Office tenants and landlords both make the same small drafting errors that can cost millions. Each mistake below carries a direct and measurable consequence.

• Skipping ongoing co-tenancy. The tenant loses the right to relief during the long middle of the term, which the ABA Commercial Leasing Committee has called the single most common error.
• Vague anchor language. A clause that says anchor tenant without naming one leaves the tenant to fight in court, and the NYU Real Estate Institute lease drafting notes warn tenants to name the exact legal entity.
• No cure period. A clause with no cure period can fire the moment a tenant closes, which may not reflect real harm, and the Chicago Bar Association real estate committee has flagged the issue.
• Unlimited alternate rent. A clause that drops rent to zero with no floor can be struck down as a penalty, which the California Civil Code § 1671 treats as unenforceable if unreasonable.
• Choice-of-law blind spots. Drafting a clause under California law for a Florida building often fails, because the Florida Supreme Court lex loci rei sitae doctrine applies the law of the land.
• No comparable-replacement standard. Without a comparable-replacement rule, the landlord can cure by signing any new tenant, which the Real Estate Law Journal from West Academic calls a loophole.
• Ignoring force majeure carve-outs. Post-2020 force majeure clauses now interact with co-tenancy in tricky ways, which the American College of Real Estate Lawyers covered in its 2023 white paper.
• No notice and reporting duty. A tenant cannot invoke the clause if it does not know the occupancy level, and the BOMA lease administration guide recommends quarterly landlord reporting.
• Stacking remedies without limits. Letting a tenant take rent abatement and termination and alternate rent at once is often struck down as a penalty, per the Restatement (Second) of Contracts § 356.

Do’s and Don’ts for Office Co-Tenancy

Both sides of the deal need a clear playbook. Each point below carries a direct reason.

• Do name the anchor by legal entity, because a successor entity may not trigger the clause if the name does not match, per the Delaware Chancery Court contract interpretation rules.
• Do set a clear cure period, because most courts enforce a cure period as a reasonable limit, which the Kleban Enterprises ruling treated as a key factor.
• Do tie alternate rent to a floor, because a zero-rent remedy risks the penalty doctrine, as the Grand Prospect ruling showed.
• Do include a termination right after a long cure, because rent abatement alone may not cover long vacancies, per the ABA Section of Real Property.
• Do require quarterly occupancy reports, because the tenant cannot invoke the clause without data, per the BOMA guide.
• Don’t rely on implied good faith, because most courts refuse to read occupancy duties into the lease, per the Restatement § 205.
• Don’t stack every remedy, because courts may strike the clause as a penalty, per the California Civil Code § 1671.
• Don’t forget force majeure, because a pandemic closure may pause the clause, per the ACREL 2023 paper.
• Don’t ignore choice of law, because the building’s state usually controls, per the Restatement of Conflict of Laws.
• Don’t skip comparable-replacement standards, because the landlord will use the loophole, per the NAIOP leasing guide.

Pros and Cons of a Strong Co-Tenancy Clause

A strong clause cuts both ways. Each point below carries a direct reason.

• Pro: Rent aligns with building value, because the tenant pays premium rent only when the building delivers premium value, which the BOMA benchmarking data supports.
• Pro: Self-help remedy, because the tenant does not need a lawsuit to cut rent, per the ABA Real Property section.
• Pro: Forces landlord to manage leasing, because the landlord loses rent if the building empties, per the NAIOP research.
• Pro: Protects recruiting and client perception, because the tenant keeps the right to move if the building fails, per the ULI mixed-use research.
• Pro: Creates a pricing tool, because the tenant and landlord can trade base rent for co-tenancy risk, per the Cushman & Wakefield research.
• Con: Complex drafting, because the clause needs triggers, cure periods, remedies, and definitions, per the Practical Law toolkit.
• Con: Litigation risk, because courts in some states strike the clause as a penalty, per the Grand Prospect ruling.
• Con: Lender pushback, because construction lenders may refuse to fund a project with open-ended rent abatement rights, per the Mortgage Bankers Association commercial lending research.
• Con: Administrative burden, because the landlord must track occupancy and report quarterly, per the BOMA lease administration guide.
• Con: May deter future tenants, because a new tenant may not want to backfill a space that triggered a co-tenancy remedy, per the NAIOP leasing brief.

Drafting the Clause Line by Line

A strong co-tenancy clause has six parts that work together. Each part carries its own drafting choice and its own consequence. The ABA Section of Real Property model form tracks all six.

The six parts are the trigger, the cure period, the remedy, the notice duty, the termination right, and the sunset clause. The trigger says what must happen for the clause to fire. The cure period says how long the landlord has to fix it. The remedy says what the tenant gets. The notice duty says how each side learns the facts. The termination right says when the tenant can walk. The sunset clause says when the clause stops protecting the tenant.

Trigger Drafting

The trigger should name an occupancy floor and list named anchor tenants by legal entity. The floor should match the market, usually between 60% and 80% in 2026, per the JLL research. The named anchors should be tied to their specific use, so a rebrand does not defeat the clause.

The consequence of a weak trigger is a clause that never fires. The consequence of a tight trigger is a clause that fires too often and creates landlord pushback at signing. The common misconception is that leased is the same as occupied, but a dark tenant can defeat the clause under Illinois appellate rulings.

Remedy Drafting

The remedy should start with rent abatement and escalate to termination. A common structure is 50% rent abatement for the cure period, then termination if the cure fails. The ICSC remedies white paper tracks this pattern in most 2026 deals.

The consequence of a one-step remedy, such as termination only, is that the tenant may not want to leave and the landlord faces a binary risk. The consequence of a stacked remedy, such as abatement plus termination plus alternate rent, is court risk under the penalty doctrine. The common misconception is that a zero-rent remedy is legal in every state, but the Grand Prospect ruling proves otherwise.

Sunset and Cure Drafting

The cure period gives the landlord time to fix the problem. Most 2026 office leases use a 9-to-12-month cure. The sunset clause ends the co-tenancy protection at a set point, often 50% or 75% of the lease term, because the tenant’s harm decreases as the lease runs out.

The consequence of no cure period is a clause that fires on a single bad quarter. The consequence of no sunset is a clause that runs to the end of a 15-year lease. The common misconception is that cure and sunset are the same, but cure is short and sunset is long, per the PLI treatise.

How Co-Tenancy Interacts With Other Lease Clauses

A co-tenancy clause does not live alone. It interacts with exclusive-use clauses, operating-expense clauses, force-majeure clauses, and SNDA clauses. The ACREL annotations walk through each interaction.

The exclusive-use clause bars the landlord from leasing to a competitor of the tenant. If the exclusive-use clause breaks and the landlord leases to a competitor, the co-tenancy clause may fire if the competitor pushes an anchor out. The operating-expense clause must be checked, because the tenant wants both base rent and operating expenses to abate during a co-tenancy remedy.

The force-majeure clause may pause or toll the co-tenancy clause during a covered event, which the ACREL 2023 pandemic paper treats as a key post-2020 issue. The SNDA clause, which the Mortgage Bankers Association SNDA guide describes, may override the co-tenancy clause after a foreclosure, so the tenant should negotiate SNDA preservation of co-tenancy at signing.

State-by-State Snapshot

Every state in the United States follows contract law on these clauses, but the results differ by state. California courts scrutinize remedies under Civil Code § 1671, per the official code text. New York courts generally enforce the clauses as written under New York General Obligations Law. Texas courts follow a strong freedom-of-contract rule, per the Texas Supreme Court commercial contract rulings.

Florida courts apply a strong penalty doctrine, per the Florida Bar Journal. Illinois courts follow the Kleban line of cases from neighboring Ohio, per the Illinois State Bar Association real estate section. Massachusetts courts treat the clause as enforceable if the remedy is reasonable, per the Massachusetts Lawyers Weekly commercial case digest.

The consequence of the state split is that drafters must read the target state’s case law before copying a clause. The common misconception is that a national landlord can use a single form in every state, but the NAIOP state survey shows material differences in 14 states.

Recap of Key Rulings

The Kleban ruling from the Northern District of Ohio treats the co-tenancy clause as a condition, not liquidated damages, and enforces it as written, per Justia’s case summary. The Grand Prospect ruling from California strikes a termination remedy as an unreasonable penalty where no actual harm exists, per the California Lawyers Association analysis. The Winn-Dixie line in the Eleventh Circuit ties co-tenancy to exclusive-use enforcement, per the Justia Eleventh Circuit page.

The practical lesson is that clauses tied to real harm and measured remedies survive, and clauses with disproportionate remedies fail. Drafters should pair every remedy with a reasonable harm theory, which the ABA Commercial Leasing Committee has urged since 2015.

FAQs

Does federal law govern office co-tenancy clauses?

No. Federal law has almost no role in commercial leasing, and state contract law controls every co-tenancy dispute, with choice-of-law rules usually pointing to the state where the building sits.

Are co-tenancy clauses common in pure office leases?

No. They are more common in retail and mixed-use, but they now appear often in office leases for mixed-use towers, medical office buildings, life-science campuses, and amenity-rich Class A properties.

Can a tenant terminate a lease under a co-tenancy clause?

Yes. Most modern clauses include a termination right after a cure period fails, and courts generally enforce the right as a freely bargained risk allocation between sophisticated parties.

Will a court strike a co-tenancy clause as a penalty?

Yes. Some courts, led by California in Grand Prospect, strike remedies that bear no reasonable relation to actual harm, so drafters should tie each remedy to measurable tenant damage.

Does an anchor tenant’s rebrand trigger the clause?

No. If the lease names the legal entity, a rebrand or ownership change usually does not fire the clause, which is why tenants should draft around legal entity and use.

Can the landlord cure by signing any new tenant?

No. Well-drafted clauses require a comparable replacement in size, use, quality, and brand strength, so a small replacement tenant does not usually cure the failure.

Do operating expenses abate during a co-tenancy remedy?

Yes. If the lease says so, but only if the tenant negotiates the abatement of both base rent and operating expenses, because silence usually means the tenant still owes operating costs.

Does force majeure pause a co-tenancy clause?

Yes. Most post-2020 leases now include a force-majeure carve-out that tolls co-tenancy triggers during a covered event, which the ACREL 2023 paper treats as standard practice.

Can a lender override a co-tenancy clause after foreclosure?

Yes. Without a negotiated SNDA that preserves the co-tenancy protection, a foreclosing lender can terminate the clause when it takes title, so tenants should negotiate SNDA preservation.

Does a leased-but-dark tenant defeat an occupancy trigger?

Yes. If the lease uses leased rather than occupied, a dark tenant still counts, so tenants should draft the trigger to use open for business and occupied together.

Is an opening co-tenancy clause enforceable in every state?

Yes. Most states enforce opening co-tenancy as a condition precedent to rent, though a few states scrutinize the remedy for proportionality, so drafters should match the remedy to real harm.

Can a tenant stack rent abatement, alternate rent, and termination?

No. Stacking all three remedies at once often draws penalty-doctrine scrutiny, so most drafters use a staircase that starts with abatement and escalates to termination.