17+ Free Lease Addendum Templates (Word | PDF) – with Guide

A Lease Addendum or Disclosure is a form that is added to a lease agreement per state laws as a supplement document meant to provide additional information on an aspect of the lease that is not addressed or discussed in the main text of the lease agreement. A lease addendum is also referred to as an Addendum to a Lease.

Before attaching it to the original lease, it must be signed by the landlord and tenant to put it in function.


Lease addenda are used when a landlord intends to adjust, refine or add details to an original lease agreement. This becomes necessary over time when changes to the lease might be necessary. Since a lease agreement is one of the efficient ways landlords can protect themselves against any issues and compliance claims, inserting addenda ensures the agreement is as airtight as possible by mitigating specific risks and liabilities.

While most addenda such as lead-based paint disclosure are required by law, most are created from experience. Consequently, a landlord can use an addendum to protect themselves from a probable liability not already addressed by the lease agreement.

Note: The difference between an addendum and an amendment is that, whereas an addendum is added as a separate document to the original lease, an amendment is made directly to the main text of the original lease. 

Involved Parties

A lease addendum, being part of the lease agreement, its contents must be acceptable to the landlord and the tenant. Once both parties have agreed to its terms, the document should be signed and added to the lease agreement.

A lease agreement being a legal document, the following technicalities are applicable in implementing the addenda:

Right to refuse

Landlords or tenants cannot be coerced or forcibly urged to sign an addendum. Each party has the right to refuse to sign the addendum. In such an event, the terms of the original lease will apply.

Note: Due to the legal nature of an addendum, legal ramifications are applicable. Therefore, breach of addenda can be penalized by applicable consequences such as eviction if the tenant is at fault or lease termination without consequences if the landlord is at fault.

Writing a General Lease Addendum

The specifics of a lease addendum will depend on the policy or regulations governing the addendum. However, the addendum should not contradict the stipulations of the original lease. A wholesome addendum should have certain basic elements to serve its purpose effectively.

Landlords can follow the guide provided below to write addenda for their lease agreements:

Date of addendum   

Firstly, the addendum needs to be dated. Write down the date when the addendum was created. Ensure to state the day, month, and year for specificity.

Landlord and tenant name and address 

Next, identify the landlord and tenant associated with the addendum. Provide information such as the official names and addresses of the landlord and the tenant. This is information should be as it appears in the original lease. Note that an addendum is an extension of the lease agreement, and consistency of information is therefore mandatory. If there is more than one tenant, ensure all the tenants are listed. 

Date of lease 

Once the involved parties have been identified, locate the original lease which is being modified. This is done by indicating the date of the lease agreement. In case the lease agreement does not have an official date, the effective date of the lease can be used instead.

Address of leased property

Afterward, state the associated property being leased. By providing the address of the leased property, it is clear the property is being linked with the addendum and the jurisdiction.

Conditions changed

Then, the landlord can indicate the purpose of the addendum. This is done by laying out the terms and conditions and a description of the amendments the landlord intends to add to the original lease agreement. This section is the main body of the addendum, and the issue at hand should be addressed exhaustively.

Tip: Too many words do not amount to an effectively written addendum. Be precise when writing the terms and conditions.

Printed names of landlord and tenant 

Next, the landlord should insert a clause or declaration that states each of the mentioned parties (landlord and tenant) read and agree to the additions or changes made through the addendum.

Signatures of landlord and tenant 

After the declaration, each party should provide their signature to illustrate that they legally agree to the contents of the addendum. Signatures are meant to validate the document and legally bind the parties to its provisions.

Date of signatures

Lastly, indicate the date when each party signed the addendum. It is recommended that both parties sign the document on the same date. Addendum can also be notarized at the landlord’s pleasure.

Once signed, each party should have a copy, and the addendum can be added to the lease agreement.

Note: Sometimes, landlords may need to add more than one addendum. Do not combine addenda. Each addendum should be written on a different page, and both parties should sign off each addendum.

How to Include the Addendum to Lease Agreement

Before resorting to an addendum, it is essential to ensure the original lease permits addenda. Then, if the use of an addendum is allowed, the process of writing and attaching a lease addendum to a lease agreement does not have to take too long. It is a task that can be completed within minutes.

Following are the steps you need to follow:

Take your tenant into confidence

Before commencing the writing process, have a discussion with the tenant and explain to them how the addendum will affect the lease and tenancy. Some disclosure might influence a tenant’s decision to lease the property; it is therefore recommended that key disclosure be communicated before tenancy. Ensure the addendum is compliant with the landlord-tenant laws to avoid misunderstandings. 

Allow your tenant consideration time

Once the addendum contents have been communicated to the tenant, give them ample time to review the addendum. This period ensures tenants decide to be willing to sign if the modified or added terms and conditions are agreeable. Then, again, wait for feedback; any concerns raised by the tenant should be clarified or amended to meet each party’s expectations.

Sign and attach 

Finally, once both parties have agreed to the provisions of the addendum, they can sign the document, and it can be added to the original lease. The addendum is then to be honored just as much as the lease itself.

Free Templates

Following are some free downloadable templates for you:

Lease addendum templates- by type


Pet lease addendum

A pet addendum is added to communicate the landlord’s stance on matters related to allowing pets within the premises. The pet addendum outlines the types, breeds, and number of pets allowed (if any). Applicable pet fees or deposits should also be stated. Ordinarily, this fee is applicable if the owner fails to keep the pet in control or the pet damages property in any way. Landlords can charge as much as they prefer unless applicable state law limits are in place. Pet fees are subject to federal law (42 U.S. Code § 3604(e) that prohibits landlords from charging a pet fee for pets used for emotional support.

Download: Microsoft Word (.docx)


Smoking addendum

A smoking addendum is used when landlords want to enforce a smoke-free environment. It states if smoking is allowed or not and declares applicable fees or consequences associated with the smoking policy in place.

Download: Microsoft Word (.docx)


Bed bug addendum

Landlords communicate the existence of bed bugs in the premises before the current lease and stipulate methods of dealing with a bed bug menace through a bed bug addendum. This disclosure is mandatory in California, Maine, and Arizona. In addition, an exterminator must be allowed to conduct tests and inspect the property to support the landlord’s claims in the addendum.

Download: Microsoft Word (.docx)


Commercial lease addendum (generic)

a landlord can attach general commercial addendums associated with commercial leases. Commercial lease addenda are normally to modify rent charges, rights to repair, and lease extension. Both parties must sign the addendum for the modification to be implemented.

Download: Microsoft Word (.docx)


Renovation/landscaping addenda

Since renovation and landscaping can be confined under the same regulations, a renovation/landscaping addendum can be added to limit or award tenants the flexibility to make changes in the property.

Download: Microsoft Word (.docx)


Occupancy/guests addenda

An occupancy addendum is used by landlords to address the number of short-term guests allowed in the premises at one time and long-term guests permitted in the premises. It can be used as a way to enforce fire-hazard requirements.

Download: Microsoft Word (.docx)


Crime free lease addendum

A crime-free lease addendum prohibits tenants from using the premises for illegal activities such as drug or crime-related activities. This addendum should be attached to the initial lease or a renewal lease.

Download: Microsoft Word (.docx)

Lease Extension Addendum

Extension addendum

Landlords use an extension addendum to award tenants an opportunity to extend their lease term and outline applicable terms after an already existing lease expires. The terms of the initial lease remain the same unless changes are implemented accordingly through addendums.

Download: Microsoft Word (.docx)


Improvements and modifications addendum

The improvements and modifications addendum give tenants leeway to make modifications to the property under certain conditions, generally with a notice of being later deducted for repairs. Improvements and modification addendum exempt the landlord from any liability associated with the improvements or modifications on the property, such as accidents, licenses, permits, damages.

Download: Microsoft Word (.docx)


Lead-based paint addendum

A lead paint disclosure is usually a requirement for a building constructed before 1978 that states if lead-based paint was used. This addendum is included as a compliance requirement to the U.S. Consumer law (42 U.S. Code § 4852d) Lead-based paint is hazardous, and landlords are expected to alert their tenants of the probable risk posed by the existence of the paint in the interior walls.

Download: Microsoft Word (.docx)


Military clause addendum

A military clause addendum is added if the tenant is actively linked to serving or joins the military. It gives the tenant flexibility to terminate the lease with a 30 days’ notice if the tenant is deployed or assigned to a different location which would be difficult and costly in the absence of such an addendum. Military clause addenda can be signed at the beginning of a lease or once the tenant enlists.

Download: Microsoft Word (.docx)


Mold lease addendum

A mold addendum declares the mold situation in the premises and discloses any mold cases reported on the property before. Health reports and tests can be attached to solidify the claims further. Property in some areas such as California, Washington, and Virginia are more susceptible than others, and therefore this disclosure is a requirement in those states.

Download: Microsoft Word (.docx)


Month-to-month lease addendum

A month-to-month addendum is inserted to convert a lease agreement to a month-to-month lease agreement. Month-to-month lease terms such as termination of the lease with a month’s notice can then be enforced. If co-tenants signed the initial lease, all the tenants must sign the addendum for the conversion to take place.

Download: Microsoft Word (.docx)


Pool & spa addendum

A pool and spa addendum outlines the landlord’s terms and conditions regarding pool and spa access, obligation, and maintenance. Besides laying out these guidelines, this addendum exempts the landlord from any liability associated with the pool and spa use, such as injury to the tenant or guests.

Download: Microsoft Word (.docx)

Residential Lease Addendum

Residential lease addendum (generic)

A landlord can attach general addendums associated with residential leases. Such an addendum offers further assurances that the residential lease will be honored.


Download: Microsoft Word (.docx)

    Standard lease addendum template


      Final Words

      A lease addendum can be a helpful tool in protecting a landlord, especially from emerging issues during the tenancy. Misunderstandings might not be inevitable between landlords and their tenants, but addenda can help it mitigate them. Through addenda, lease agreements are more flexible as they provide an avenue for incorporating changes or additions. Before attaching an addendum, always ensure it is compliant with Fair Housing laws and state laws. In addition, each party ought to sign the disclosure for it to be legally enforceable.

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