What this document is
A pet addendum is a short agreement attached to an existing lease. It names one animal, records the responsibilities the tenant takes on for it, and states how the addendum fits with the lease. It is signed by the landlord and by every tenant on the lease. Unlike a notice, it does nothing until both sides sign.
The generator builds the addendum from the facts you enter: the lease date and parties, the rental address, a description of the animal, the agreed responsibilities, an optional set of other terms, and the names of the people signing. The clauses are numbered so either side can refer to them later.
What it covers and what it leaves out
The document contains a permission clause for the one described animal, a responsibilities clause built from the items you tick, a damage clause that defers to the lease, a clause that no other animal may be kept without written consent, the effective date and term, an optional withdrawal-of-consent clause, a sentence that assistance animals are handled separately, and an entire-agreement clause that keeps the rest of the lease in force.
It deliberately leaves out pet deposits, pet fees and pet rent. Those charges are regulated differently from place to place, and we have not reviewed the limits across states and cities. The addendum says in plain words that any such payment is not addressed and must be agreed separately in writing. It never prints an amount.
Fees, deposits and pet rent
If you and the other side agree on a payment, put it in a separate written agreement after reading an official page for your state and, where one exists, your city. The notes beside the preview show a source-checked note where an editor has opened an official publication. For California, the Department of Real Estate’s tenant guide says a pet deposit counts toward the overall security deposit limit; the note cites the page. Everywhere else, the note says plainly that we have not checked.
Assistance animals
An animal that a tenant needs because of a disability is not a pet. A request to keep one is a request for a reasonable accommodation, and pet fees, pet deposits and breed rules do not automatically apply. The first step asks which situation you are in. If you choose assistance animal, the tool stops, explains why, and links to the Assistance-Animal Accommodation Request and to official fair housing resources. We would rather stop than produce a document that looks routine but is wrong for the situation.
Signing it
Both sides sign and date. Each tenant on the lease gets a separate signature line, because an addendum signed by only some tenants may not bind the others. Printed names should match the lease. An electronic signature is not automatically suitable for every document; if you use one, keep the completed copy and the signing record. Then attach the signed addendum to the lease and make sure each party has a complete copy.
After it is signed
Take dated photos of the unit, including floors, doors, trim and any yard, on or before the effective date. If vaccination records were provided, keep a copy with the addendum. If your city or county requires a pet license, record the number before signing and keep the license current. If you later agree on a deposit, fee or pet rent, write it in a separate signed agreement so the paper trail stays clear.