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Lease Addendum Template

A lease addendum is a supplemental document to a lease agreement that adds terms or conditions binding both parties. It commonly doesn't affect the lease's core provisions, but additional rules or language not covered in the original agreement (e.g., allowing a pet on the property).
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Updated March 19, 2025

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By Type (12)

Bed Bug Disclosure

Commercial Lease

Crime & Drug

Improvements/Mods

Lead-Based Paint

Lease Extension

Military Lease

Mold

Month-to-Month

Pet Addendum

Pool & Spa

Residential Lease

 

How to Add an Addendum (3 steps)

  1. Speak with the Tenant
  2. Tenant Reviews the Addendum
  3. Sign and Attach

1. Speak with the Tenant

landlord explaining addendum to 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

landlord and tenant reviewing lease addendum together

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

tenants signing lease addendum with landlord present

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

1. Before or During Lease Signing

If an addendum is presented during the signing process, the tenant generally must sign it. If the agreement mentions the addendum as a contingency, the tenant must sign it.

2. After Lease Signing

If an addendum is presented after the lease has been signed, the tenant is generally not obligated to sign it. Without the tenant’s consent, the addendum cannot be enforced.

Breaking an Addendum

If a landlord or tenant breaks the terms of an addendum, it is the same as breaking the conditions of a lease.

Tenant’s Eviction: This means that a tenant can be evicted from their dwelling if they don’t abide by an addendum.

Landlord’s Default Likewise, a landlord can default on a lease if they break its terms, allowing the tenant to move out and possibly seek damages.