Commercial leases differ fundamentally from residential leases. They are negotiated between sophisticated parties (or their agents), involve significantly more complex financial and legal terms, and carry far fewer consumer protections than residential tenancies. A California broker working in commercial real estate must understand the full spectrum of lease types, structures, and commercial-specific clauses that define the economics of a commercial tenancy.
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Gross leases are common in multi-tenant office buildings and are simple from the tenant's perspective — one predictable payment. The landlord assumes all risk of cost increases. From the landlord's perspective, this requires careful budgeting and reserves to absorb cost volatility.
Modified Gross Lease: A variation where the base rent is gross, but certain specified expenses (e.g., utilities) are the tenant's responsibility. Common in creative office or co-working environments.
Net leases shift operating expenses to the tenant. There are three levels:
Single Net (N) Lease:
Double Net (NN) Lease:
Triple Net (NNN) Lease:
Absolute NNN (Bond Lease):
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Two mechanisms allow a commercial tenant to transfer their leasehold interest:
Assignment:
Sublease:
Landlord perspective: Landlords generally prefer tighter control over assignment and sublease — an undesirable tenant could end up in the space. Most commercial leases include "landlord consent required, not to be unreasonably withheld" language.
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In multi-tenant commercial properties, CAM charges cover the costs of maintaining shared spaces:
CAM charges are typically estimated annually and billed monthly in addition to base rent. At year end, actual expenses are reconciled against estimates — if actuals exceed estimates, the tenant pays a "true-up"; if actuals are lower, the tenant receives a credit.
Tenants should negotiate:
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A tenant improvement allowance is money provided by the landlord for the tenant to build out or improve the leased space:
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Before executing a commercial lease, the parties typically negotiate a letter of intent (LOI):
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The SNDA is a critical clause in commercial leases when a mortgage is on the property:
Subordination: The tenant's leasehold interest is subordinate to the landlord's mortgage — if the property is foreclosed, the lender's interest is senior.
Non-Disturbance: Despite subordination, the lender agrees not to disturb the tenant's possession if the tenant is in compliance with the lease terms and the property is foreclosed. This protects the tenant from being evicted if the landlord defaults on their mortgage.
Attornment: The tenant agrees to recognize a new owner (lender after foreclosure, or new purchaser) as the landlord under the same lease terms.
The SNDA is typically required by lenders when financing commercial properties with existing tenants. Tenants benefit from the non-disturbance provision — without it, a foreclosing lender could terminate their lease.
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An estoppel certificate is a signed statement by a tenant confirming:
Landlords typically request estoppel certificates when selling or refinancing a property. The buyer/lender needs to know the status of all tenancies. Tenants are usually required by the lease to provide an estoppel certificate within 10–20 days of request. A tenant cannot use an estoppel certificate to assert new claims against the landlord that contradict prior lease terms.
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Quiz Questions:
Q1. A retail tenant under a percentage lease pays a base rent of $8,000/month and a percentage rent of 5% of annual gross sales above the natural breakpoint. Annual base rent is $96,000/year. What is the natural breakpoint?
A) $160,000 B) $1,600,000 C) $1,920,000 D) $480,000
Answer: C — Natural breakpoint = Annual Base Rent ÷ Percentage Rate = $96,000 ÷ 5% = $1,920,000. The percentage clause only applies to sales above this figure.
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Q2. A tenant assigns her lease to a third party with the landlord's consent. The assignee defaults on the rent. Who is liable to the landlord?
A) Only the assignee, as the original tenant transferred all obligations B) Only the original tenant, because she signed the original lease C) Both the original tenant and the assignee may be liable depending on the lease language regarding the original tenant's continuing liability D) Neither — the landlord's only recourse is against the property
Answer: C — In most commercial assignments, the original tenant remains secondarily liable unless the landlord expressly releases them. The assignee is primarily liable, but the original tenant can be pursued if the lease is silent on release.
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Q3. A ground lessee builds a 10-story office building on land leased from a landowner for 75 years. When the lease expires, who owns the building?
A) The ground lessee, because they paid to construct it B) The landowner, because improvements revert to the land at lease end C) The city, which has jurisdiction over abandoned structures D) Whoever purchases the building before lease expiration
Answer: B — In a standard ground lease, all improvements constructed by the tenant revert to the landowner at lease expiration. This is a fundamental characteristic of ground leases.
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Q4. A commercial tenant receives an estoppel certificate from her landlord prior to the building's sale. The certificate states no rent has been prepaid and no landlord defaults exist. The tenant signs it but later claims the landlord was actually in default at the time. What is the likely legal effect?
A) The tenant can still assert the default because the estoppel was signed under duress B) The tenant is estopped from asserting facts that contradict the signed certificate C) Estoppel certificates are not legally binding D) The new buyer takes the property subject to all known and unknown claims
Answer: B — An estoppel certificate creates an estoppel — the signing party is legally barred from later asserting facts that contradict their prior signed certification. This is the entire purpose of estoppel in commercial real estate.
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Q5. A commercial tenant wants to move out of half her 5,000 SF office space 18 months before lease expiration and rent that portion to a technology startup. This arrangement is best described as a:
A) Assignment of the entire leasehold B) Sublease of the partial space C) Lease modification D) Ground lease of the vacated space
Answer: B — Renting a portion of leased space to another party (the startup) while the original tenant remains in occupancy and continues to pay rent to the landlord is a sublease. The original tenant remains the primary obligor to the landlord.