Lease Addendum Templates

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The lease addendum templates allow a landlord or tenant to make changes to a current residential or commercial lease agreement. Instead of changing the actual lease agreement, an addendum is a document added to a lease agreement outlining the prearranged modifications. Once both parties agree with the addendum, each party must sign the document to make it legally binding.

Disclosure” – An addendum can also refer to a “disclosure” that must be attached to a lease in accordance with State law.

Table of Contents

What is a Lease Addendum?

A lease addendum, or ‘Addendum to a Lease’, is a document that expands upon and gives more information related to a section or clause in a lease agreement. For example, there may contain a section in a lease about specific rules regarding “pets” and reference an attached “pet addendum” that lists the set of rules. With some addendums such as the lead-based paint addendum, the tenant cannot enter the property until it has been signed and therefore should be required before giving access.

Lease Addendums: By Type (11)

Bed Bug Addendum – Required disclosure in Arizona, CaliforniaMaine, and New York City. Alerts the tenant of ways to get rid of bed bugs and if they have been in the residence prior to occupancy.

Download: Adobe PDF



Commercial Lease Addendum – For any industrial, retail, office, or any space that is considered a non-residential use.

Download: Adobe PDF, MS Word, OpenDocument




Crime Free Lease Addendum – Verifies that the tenant will not use the premises for the use of drug or crime-related activity.

Download: Adobe PDF, MS Word, OpenDocument




Extension Agreement – To extend the end date of a lease agreement.

Download: Adobe PDF, MS Word, OpenDocument




Improvements and Modifications – Allows the tenant to make modifications to the property. Often this will come with the caveat of being able to deduct any repairs from future rent.

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HUD Tenancy Addendum – Required for most HUD tenants.

Download: Adobe PDF




Lead-Based Paint Lease Addendum

Download: Adobe PDF




Military Clause Addendum – If the tenant is in or joins the military this addendum gives them the right to terminate the lease at any time with thirty (30) days’ notice. May only terminate if certain conditions are met such as the individual being deployed or assigned to a different location.

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Mold Lease Addendum – To provide helpful information about mold and its dangers. The landlord will also be required to provide any reports or tests showing if mold has ever existed on the property.

Download: Adobe PDF, MS Word, OpenDocument



Month-to-Month Lease Addendum – Converts a standard lease with a start and end date to a month-to-month arrangement with either party being able to cancel within a specified time period or in accordance with State law (commonly 1-month notice).

Download: Adobe PDF, MS Word, OpenDocument



Pet Lease Addendum – To allow pets when in the original lease the tenant was prohibited.

Download: Adobe PDF, MS Word, OpenDocument




Pool & Spa Lease Addendum – If the tenant is allowed access to a pool or spa this addendum states the terms and conditions as well as the responsibility of its maintenance.

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Residential Lease Addendum – General addendum for a residential lease.

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How to Add an Addendum (3 Steps)

1. Speak with the Tenant

Speak to the tenant and fully explain how the addendum affects the lease. Most often, an addendum will be a type of disclosure that explains the property rules. For example, if pets are allowed, a list of the sizes of pets and the types may be listed in the addendum.

2. Tenant Reviews the Addendum

The tenant should be given an ample amount of time to review the document. After reading, if the tenant agrees with its contents and has no question they should be given instructions to sign.

3. Sign and Attach

After signing, the addendum will be attached to the lease and be made part of it. Any violation of the terms of the addendum will effectively be a violation of the lease.

Refusing to Sign

If a tenant refuses to sign a lease addendum then the lease agreement will be held to its original terms. For example, if a tenant does not sign a pet addendum, the tenant will not be able to have pets on the property.

Breaking an Addendum

The rules of an addendum should be respected in the same manner as of a lease. If a tenant or landlord becomes in default to an addendum it can be a breakable offense. Meaning that a tenant can be evicted from their dwelling if they don’t abide by the addendum. Likewise, a tenant can part ways with their lease and not be subject to fees or rent payments if their landlord fails to uphold an addendum.

How to Write

Step 1 – Download in Adobe PDF, Microsoft Word (.docx), or Open Document Text (.odt).

Step 2 – The first section of a lease addendum must include the following details:

  • Date addendum is created
  • Date lease agreement was created
  • Landlord name
  • Tenant name
  • Address of leased property

Step 3 – A description of the amendments that will be applied to the lease agreement must be recorded.

Step 4 – The addendum must include a clause stating that both parties agree to the changes made to the lease. To make the document legally binding, both the landlord and the tenant are required to sign and date the form.