Lease Addendum Template

4.7 (63 reviews)
All states | 2 types
Updated Apr 24, 2025
~ 2 pages
PDF
5.9K downloads
Lease Addendum Page 1
Preview
Written by Karyna Pukaniuk - Reviewed by Jonathan McGill

Template Types

Pet Addendum Form
This form is critical for securing viable living conditions for pets on the property.

What Is a Lease Addendum?

Copy section link

A lease addendum is a document used to add new terms or rules to a lease that’s already in place, without having to rewrite the whole thing. It’s not the same as an amendment, which replaces parts of the original lease. Instead, an addendum simply adds something extra, like pet rules, changes to who pays utilities, or updates about roommates.

It’s helpful to know that an addendum to lease is not the same as a rental agreement. The rental agreement is the main contract that sets all the basic terms between the landlord and tenant — things like rent amount, lease duration, and general responsibilities. The rent addendum just adds to that original contract when something new comes up during the lease.

For example, if a tenant decides to adopt a dog halfway through the lease, the landlord and tenant can sign a rental agreement addendum that lays out the rules, any pet deposit, and who’s responsible if there’s damage — no need to start a new lease from scratch.

When To Use an Addendum To Rental Agreement Template

Copy section link

Rental addendums are often used when either party wants to adjust terms during the lease period. Common situations include:

  • Allowing pets with specific restrictions or fees.

  • Increasing rent due to rising maintenance costs.

  • Extending the lease by a few months or to a new fixed term.

  • Changing utility or maintenance responsibilities.

  • Adding or removing roommates.

How To Fill Out a Lease Agreement Addendum

Copy section link

Filling out an addendum to lease agreement is simple when you follow a structured process:

  1. Identify the Parties: Include the landlord’s and tenant’s full legal names and addresses.
  2. Reference the Original Lease: Specify the date and title of the existing lease.
  3. State the New Terms Clearly: Whether it’s a rent change or a new pet policy, be direct and specific.
  4. Include an Effective Date: State when the addendum takes effect.
  5. Add Signatures: Both parties must sign and date the document.
  6. Attach the Addendum to the Lease: It becomes a legal part of the original lease once signed.

To avoid missing key legal language or formatting errors, use a customizable lease addendum template at Loio.

How To Add an Addendum To a Lease

Copy section link

Adding a lease agreement addendum sample involves mutual agreement and formal documentation:

  • Discuss the change with the other party and ensure mutual consent.

  • Draft or download a lease addendum PDF and fill it out completely.

  • Review local and state laws to ensure compliance.

  • Sign and date the document, ideally in duplicate.

  • Attach it to the lease and keep copies for both parties.

If you're using a digital platform like Loio, you can create, fill out, and digitally sign your lease addendum all in one place, saving time and ensuring security.

What Happens If Someone Refuses To Sign a Lease Addendum?

Copy section link

If one party doesn’t agree to the lease addendum form, it cannot be legally enforced. In that case, the original lease remains unchanged. Both landlord and tenant have the right to decline a proposed change, which is why early communication is key.

What if someone breaks the addendum?

A signed addendum carries the same legal weight as the original lease. Breaching its terms could lead to:

  • Lease termination.
  • Legal action for damages.
  • Eviction (for tenants) or loss of rental income (for landlords).

Always consult a legal professional if you’re unsure of your rights.

What Documents Often Come Side by Side with a Lease Addendum?

Copy section link

Depending on the situation, you may also need other documents that help manage changes or issues during a lease. Here are some that commonly go hand in hand with an addendum to rental agreement:

  1. Sublease Agreement Template: If a tenant wants to rent the property to someone else — for example, during a temporary move — a sublease agreement is used to outline the responsibilities of the new occupant while the original lease stays in place.

  2. Eviction Notice Template: If a tenant breaks the lease or violates an addendum, such as ignoring pet restrictions or not paying updated rent, an eviction notice may follow. 

  3. Lease Termination Letter Template: Sometimes, after an addendum is introduced (like a rent increase), either the tenant or landlord may choose to end the lease. This letter formally communicates the decision and sets a move-out date.

  4. Landlord Reference Letter Template: When a lease ends — either by addendum or termination — tenants may request a reference. This letter helps them rent future homes by showing they were responsible occupants.

  5. Late Rent Notice Template: If a lease addendum example involves changes to rent or due dates and the tenant misses a payment, a late rent notice can be sent to document the issue and request prompt payment.

Related Documents

Lease Addendum Preview