Lease Addendum Template: Free Fillable PDF + Example
A lease addendum is a separate signed page that adds to or changes a lease that is already in place, for example a new rent amount, a parking space, a pet, a new roommate or a later end date. It names the original lease, describes the change exactly, says when it starts, and is signed by the landlord and every adult tenant. Below is a free fillable lease addendum (PDF), the most common types, how to write one, the addenda federal law requires, and a filled in example.
Free fillable lease addendum (PDF). One page: the original lease details, checkboxes for the type of change, a large box to describe it, the start date, an “everything else stays the same” clause and signature lines for the landlord and up to 3 tenants.
Fill it in on your computer or print it.
Want more forms? Join our email list and get the free Landlord Starter Kit: the filled in example ledger, the Quick Start guide and 5 printable forms.
What is a lease addendum?
An addendum is an extra document that becomes part of the lease. You may also see the word amendment. People often use the two words loosely: an addendum usually adds something new, and an amendment usually changes a term that is already in the lease. What matters is the same for both: the change is in writing, it points to the original lease, and everyone who signed the lease signs it.
Common types of lease addenda
| Addendum | Typical use | On our site |
|---|---|---|
| Pet addendum | Rules, deposit or fees for a pet | Pet addendum template |
| Lease extension | Moves the end date, often with the same terms | See also our lease renewal letter |
| Rent change | New rent amount and start date, when the lease allows it or both agree | See our rent increase letter for notice rules |
| Parking or storage | Assigned space, fee, vehicle rules | This form |
| Utilities | Who pays which utility from a set date | This form |
| Occupants or roommates | Adds or removes a person on the lease | This form |
| Smoking | Smoking or vaping rules for the unit | This form |
How to write a lease addendum
- Name the original lease: its date, the landlord, every tenant and the rental address.
- Describe the change exactly: amounts, dates, rules and who pays what. Vague wording causes disputes later.
- Give a start date for the change.
- Say everything else stays the same, and that the addendum controls only for the items it covers.
- Get every signature: the landlord and every adult tenant on the lease, with dates.
- Give everyone a copy and keep yours with the lease and your rent ledger if the rent changes.
Addenda federal law requires
- Lead-based paint disclosure (housing built before 1978). Before the lease, landlords must disclose known lead-based paint and hazards, give available reports and the EPA pamphlet “Protect Your Family From Lead in Your Home”, and attach a Lead Warning Statement to the lease or put it in the lease. Keep the signed disclosure for 3 years. Exemptions include leases of 100 days or less, zero-bedroom units and housing found lead-based paint free by a certified inspector.
- HUD tenancy addendum (Housing Choice Voucher leases). All of its provisions must be added word for word to the owner’s lease, and if the lease conflicts with it, the tenancy addendum prevails (24 CFR 982.308). See how to become a Section 8 landlord.
Many states and cities require their own disclosures too. Check your state law.
Example: a parking addendum
Alicia and Ben Grant rent 212 Hillcrest Ave, Unit 1, Raleigh, NC 27610 under a lease dated 07/01/2026 that runs to 06/30/2027. In February they ask to rent the parking space behind the building. Both sides agree, so the landlord fills in the addendum:
| Line | Entry |
|---|---|
| Type of change | Parking or storage |
| Details | Space #2 behind the building, $40.00 a month paid with the rent on the 1st, one registered working vehicle |
| Starts | 03/01/2027 |
| Signed by | The landlord on 02/10/2027 and both tenants on 02/11/2027 |
The landlord then adds the $40.00 parking fee as its own line in the rent ledger from March. Names and addresses in this example are made up.
Can you add an addendum in the middle of a lease?
During a fixed term lease, a new term generally needs the tenant’s agreement, which is why both sides sign the addendum. On a month to month tenancy, many states let a landlord change terms with proper written notice, but the notice period and rules depend on the state. An addendum generally cannot take away rights that state or federal law gives tenants.
Lease rules differ by state and city. Check your local law, or ask a local attorney, before you change a lease.
Frequently asked questions
What is a lease addendum?
A separate signed document that becomes part of an existing lease and adds or changes terms, such as a new rent amount, a pet, parking, utilities, a roommate or a new end date.
What is the difference between a lease addendum and an amendment?
People often use the words loosely. An addendum usually adds something new and an amendment usually changes an existing term. Either way, put it in writing, refer to the original lease and have everyone sign.
Does a lease addendum need to be signed by both parties?
Yes, it should be signed and dated by the landlord and every adult tenant who signed the lease, and everyone should get a copy.
Can a landlord add an addendum without the tenant agreeing?
During a fixed term lease, a new term generally needs the tenant’s agreement. On a month to month tenancy, many states allow changes with proper written notice. Check your state law.
Which lease addenda are required by law?
Federal law requires a lead-based paint disclosure for most housing built before 1978 and the HUD tenancy addendum for Housing Choice Voucher leases. Many states and cities require other disclosures.
Rent or fees changed? Record every payment with our free rent ledger template.
