Lease Extension Addendum for Commercial Agreements
Learn how a lease extension addendum extends a commercial lease, updates key terms like rent or deposits, and helps avoid costly renegotiations. 5 min read updated on September 11, 2025
Key Takeaways
- A lease extension addendum extends the duration of a commercial lease while allowing parties to adjust terms such as rent, deposits, or maintenance duties.
- It should clearly identify the landlord, tenant, property, original lease date, and new lease period.
- Addendums may also include changes to rent, security deposits, payment instructions, repair responsibilities, or insurance requirements.
- Using an addendum is often simpler than drafting a new lease, but it must be executed with the same legal formalities as the original lease.
- Month-to-month agreements are more flexible but carry risks for both landlord and tenant compared to a formal addendum.
- Legal compliance, clear drafting, and mutual consent are essential to avoid disputes.
An addendum to commercial lease agreement extension contains certain pieces of information:
- The name and address of the landlord.
- The name and address of tenant who currently holds the lease.
- The address and details of the property itself.
- The name and date of the original agreement.
- The proposed start and end dates of the new lease terms.
- Any change to the rental amount.
- A statement that the lease agreement remains in full effect.
If the lessor and the lessee don't live near each other, the agreement can be signed in counterparts, allowing the parties to execute separate copies of the lease. The agreement is governed by the laws of the state where the property is located. The signatures of the landlord and all the tenants are required.
Extending the Duration of a Lease
A lease renewal agreement is a document signed by a landlord and a tenant to extend the duration of a lease. In addition to the modification of the lease's expiration date, the rental amount charged may also be changed. Apart from this, the terms of the existing lease agreement remain the same.
Whether you are a landlord or a tenant, you should consider putting a lease renewal agreement into place if your lease is going to expire soon. It provides a quick and seamless way to extend this agreement. In some cases, your initial lease agreement may even include an option to renew. In this case, the tenant simply needs to exercise this option for the terms to be renewed.
Sometimes, if you have signed a lease agreement for a commercial space, such as a warehouse, office, or shop; your circumstances may change, making certain provisions in the original lease no longer suitable.
If you have a long-standing relationship of mutual trust with your landlord, you may both agree that you want your relationship to continue without having to negotiate a new lease agreement. This is likely to be the case if the landlord knows that you pay the rent on time every month, don't cause problems, and treat the property respectfully. With a lease renewal agreement, the lessee and lessor can quickly and easily extend the lease to a new expiration date, while the other terms and conditions of the original agreement remain intact.
Over and above extending the term of an existing lease, the lessee and lessor could also discuss other changes to be made to the agreement. This could include the following:
- A new monthly rental fee.
- A higher security deposit.
- A new address to which rental payments must be sent.
- Repairs that need to be carried out by the landlord.
- New appliances that need to be installed.
- A requirement that the renter take out insurance.
Benefits of a Lease Extension Addendum
Choosing a lease extension addendum instead of signing a new lease agreement offers several advantages:
- Efficiency: Saves time and costs compared to drafting a new lease.
- Flexibility: Parties can adjust only the terms that need change.
- Continuity: Ensures stable tenancy and avoids business interruptions.
- Reduced risk: Keeps most original terms intact, minimizing legal uncertainty.
- Relationship preservation: Encourages ongoing cooperation between landlord and tenant.
Commercial tenants, in particular, benefit from predictability in rent and location stability, while landlords avoid vacancy costs and turnover expenses.
Key Elements of a Lease Extension Addendum
A lease extension addendum serves as a formal legal document that modifies the original lease while keeping most provisions intact. To ensure enforceability, the addendum should include:
- Identification of parties: The legal names and addresses of both landlord and tenant.
- Property description: Address and unit details to avoid confusion.
- Original lease reference: Date and title of the initial agreement.
- Extension dates: Clear start and end dates of the extended term.
- Financial adjustments: Any new rent amount, security deposit, or utility responsibilities.
- Continuity clause: A statement that all other terms of the original lease remain in effect unless modified.
- Signatures: Both landlord and tenant must sign; notarization may be required in some jurisdictions.
This clarity helps prevent disputes and ensures both parties understand their rights and obligations under the extended lease.
Month-to-Month Agreements
Month-to-month agreements provide an alternative to lease renewal agreements if the landlord and tenant want an existing lease to continue past the expiration date. However, there are disadvantages to month-to-month agreements for both the landlord and the tenant. If the contract is on a month-to-month basis, the landlord is unable to increase the monthly rent. The landlord would be faced with the constant uncertainty of not knowing when the tenant might decide to give notice and move out.
At the same time, the tenant won't be able to insist that any repairs that need to be done be carried out. The tenant is also faced with the possibility of eviction. The landlord could deliver an eviction notice at any time, forcing the tenant to move out.
On the other hand, a month-to-month agreement can save both the landlord and the tenant time and money. The landlord is spared the expense of marketing the property, hiring cleaners and painters, and carrying out repairs. This agreement also prevents the property from standing empty while a new tenant is found.
A month-to-month agreement spares the tenant a lot of headaches, such as:
- The expense and inconvenience of searching for new premises.
- Packing.
- Hiring a moving company.
- Paying a broker.
- The possibility of having to pay higher rent.
If a landlord and tenant have managed to maintain a good relationship, lots of hassle can be avoided for both parties.
Common Pitfalls to Avoid
While a lease extension addendum offers many advantages, certain mistakes can undermine its effectiveness:
- Vague terms: Ambiguity in dates, rent adjustments, or property details can create disputes.
- Failure to comply with state law: Some jurisdictions impose specific rules on commercial lease modifications.
- Ignoring renewal options: If the original lease contains a renewal clause, both parties must follow those procedures.
- Lack of signatures: Without proper execution, the addendum may be unenforceable.
- Unaddressed obligations: Failing to update responsibilities like maintenance, insurance, or taxes can leave gaps.
Both landlords and tenants should carefully review the addendum to ensure it reflects their intentions and complies with local regulations.
Frequently Asked Questions
-
What is the purpose of a lease extension addendum?
It formally extends the original lease while allowing changes to specific terms such as rent, deposit, or maintenance obligations. -
Can a lease extension addendum change rent?
Yes. An addendum can increase, decrease, or otherwise modify the rental amount while keeping other terms intact. -
Is a new lease better than an addendum?
Not always. An addendum is simpler and keeps the original lease terms, while a new lease may be necessary for major changes. -
Do lease extension addendums need to be notarized?
Not always, but some states require notarization for commercial leases. Parties should check local laws. -
What happens if only one party signs the addendum?
The addendum is not enforceable unless signed by both landlord and tenant, as it modifies an existing legal contract.
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