Pet Addendum to a Lease: Free Template (2026)

The email that starts this is usually polite. Saturday morning: “We’ve been thinking about adopting a shelter dog, a lab mix, two years old and around sixty pounds. Would you be open to that?” This is the pet conversation in its best form. The tenant asked before acting. No one is hiding a dog, no notices have gone out, and whether it stays this friendly is now the landlord’s call.

“Sure, that’s fine” is tempting to send. The yes is not the problem; the floating is. Month six arrives with a ruined carpet, a lease that still reads no pets, and permission living in a text thread no one can dig up. A pet addendum puts the yes on paper: which animal, on what financial terms, under which rules, attached to the lease both sides already signed.

This guide covers the whole instrument, the three kinds of pet money and the states that regulate them, a free pet addendum template to copy, the assistance-animal rule that overrides everything else on this page, and what happens when a pet shows up without any of it.

What a pet addendum is, and why a verbal yes is not enough

An addendum is a signed add-on that becomes part of the lease without disturbing the rest of it, the same instrument our residential lease addendum guide covers in its general form. The pet addendum is that tool pointed at one subject. The base lease usually says no pets, or says nothing; the addendum grants permission for one named animal, prices it, and sets the conditions the permission rides on.

The named part does real work. A pet addendum that authorizes “a dog” authorizes the sixty-pound lab mix and, later, the second dog, and arguably the roommate’s dog, and the argument writes itself from there. One that authorizes “Biscuit, a neutered two-year-old Labrador mix, approximately 60 lbs, license #4417” authorizes exactly one animal, and removes the identity question entirely. When Biscuit is joined by an unauthorized friend, the lease has something precise to point at.

The alternative to paper is memory, and memory has a poor record in landlord-tenant disputes. A verbal yes cannot prove its own terms: whether the deposit went up, who covers the scratched floors, whether permission was for this dog or any dog, whether it survives a renewal. The addendum answers those questions on the day everyone is still friendly, which is the only day the answers come cheap.

Pet deposit, pet fee, pet rent: three different kinds of money

Most of the confusion in pet money comes from three different charges wearing similar names. The differences decide who holds the cash at the end. A pet deposit is refundable security. It sits with the rest of the deposit, gets spent only on pet damage, and whatever survives the move-out inspection comes back. A pet fee is a one-time payment the tenant does not get back, permission money rather than security. Pet rent is a monthly surcharge, twenty-five or fifty dollars riding on top of the base rent for as long as the animal lives there.

Which of the three a landlord may use is a state question, and California shows how sharp the rules can get. Under Civil Code 1950.5, “security” means any payment, fee, deposit, or charge imposed at the start of the tenancy, whatever it is called on the page. A “pet deposit” in California is not a separate bucket; it is part of the one security deposit, capped with everything else. And the statute closes the renaming door with a flat rule: a lease or rental agreement shall not contain a provision characterizing any security as “nonrefundable.” The one-time non-refundable pet fee, common elsewhere, is not a lawful California instrument.

The practical order for a landlord drafting the money section: check your state’s deposit cap first, then decide which pet charges fit inside or alongside it, then write the numbers into the addendum with their real names. Our security deposit limits table carries every state’s cap, and the deposit interest page covers the states where holding that money carries interest duties of its own.

State pet-deposit rules: the verified examples

A handful of states legislate the pet layer by name, and they disagree in instructive ways. The table below shows the five regimes we verified against statute text in July 2026; states not listed either fold pet money into their general deposit rules or leave it unregulated, so the general cap from the deposit-limits page is the number to check.

Kansas is the tidy middle case: the general cap holds at one month unfurnished, and K.S.A. 58-2550 lets a landlord who permits pets demand an additional security deposit of up to half a month’s rent. Nebraska runs the same design at a quarter month. Hawaii allows a separate pet-animal deposit in an amount the parties agree on, alongside its one-month cap. Delaware writes a ceiling on the pet layer itself, one month’s rent no matter how long the lease runs, under 25 Del. C. 5514.

Notice what every one of these states has in common: the pet charge they regulate is a deposit, refundable security with a statutory limit. A landlord who charges the Kansas half-month as a “non-refundable fee” has not used the statute; a landlord who stacks a pet deposit on top of a maxed-out California security deposit has broken one. The label and the math both have to survive your state’s rules, which is exactly the kind of thing worth five minutes against the table before anyone signs.

The pet addendum template (copy and paste)

The pet addendum template below is yours to copy into a document and adapt. Its design stays narrow on purpose. One existing lease, one precisely named animal, money in whichever shapes your state allows, and the rules the permission depends on. Every bracket gets filled, the money lines your state bars get struck rather than left blank, and both signatures land before the animal does.

Most template forms skip clause 7. Keeping it is what makes the document honest, and the reason gets its own section below.

How to fill it out: the details that settle later arguments

An insurance adjuster’s level of description is the standard here: name, species, breed, age, weight, color, and the license number where your city issues one. The vaccination record belongs attached as an exhibit, not promised. A photograph of the pet clipped to the addendum costs nothing and removes the “that’s a different dog” conversation from every future dispute.

Write the money with its legal names. If the charge is refundable security, call it a pet deposit and treat it like the rest of the deposit, itemization at move-out included. If your state permits a one-time fee, say fee and say one-time. If there is pet rent, give the monthly number and tie it to the rent due date. Vague blends, “$500 pet charge,” inherit the worst of every category: tenants assume it is refundable, landlords assume it is not, and a judge gets to pick.

Decide the number of pets on paper, not by drift. One addendum per animal is the cleanest pattern; a second pet gets a second signed addendum, its own description, and its own money terms. The addendum should also say what happens to the pet layer when the lease renews, the simplest answer being that it carries forward with the rest of the lease terms unless replaced.

The assistance-animal rule that overrides this whole page

Everything above assumes the animal is a pet. Some animals are not, legally speaking, and the distinction is federal. Refusing a reasonable accommodation in rules or policies counts as discrimination under the Fair Housing Act when a person with a disability needs that accommodation for equal opportunity to use and enjoy the home. The provision is 42 U.S.C. 3604(f)(3)(B). HUD’s regulation, 24 C.F.R. 100.204, supplies the canonical example. A no-pets building turns away a blind applicant’s seeing-eye dog, and the refusal is itself the violation, since without the dog there is no equal opportunity to use the dwelling.

An assistance animal, in that framework, is an accommodation rather than a pet, which is why the pet addendum’s terms do not attach to it. The no-pets clause yields to it, and conditioning it on pet money runs against the grain of the accommodation duty. Delaware puts the money rule in black and white: a landlord shall not require any pet deposit when the animal is a duly certified and trained support animal for a disabled resident, under 25 Del. C. 5514(i)(3).

For the landlord holding this template, the practical rule is short. The moment a tenant ties an animal to a disability-related need, the pet addendum leaves the table. What remains is an accommodation request, handled in writing, on its own track. Our lease violation notice guide walks through the same fork from the enforcement side. Get that call wrong and the paperwork problem becomes a federal one.

The unauthorized pet: what this addendum prevents

The addendum’s quiet job is being the alternative to a fight that state law has already scripted. An unauthorized pet is one of the classic curable lease violations; Florida’s statute names the category in its example list, conduct “such as having or permitting unauthorized pets, guests, or vehicles,” under Florida Statutes 83.56(2)(b). The scripted version goes: dog appears, landlord serves a cure-or-quit notice, tenant rehomes the dog or the eviction file opens. Nobody enjoys any scene of it.

A signed pet addendum converts that script into a transaction. The dog still shows up; the difference is that it shows up with permission, a deposit, and rules attached. For a landlord, that trade is usually worth making deliberately rather than grudgingly. The building either allows pets or it does not, but “no pets, except by signed addendum on these terms” is a policy that captures responsible owners’ money and keeps the enforcement path clean for everyone else.

And when a tenant skips the process, the addendum’s absence is itself evidence. Where the lease bars pets and an addendum path was on offer, the unauthorized dog is a plain violation with a plain cure. Sign the addendum and pay the deposit. Or the animal goes. Much of what this document prevents, it prevents by settling the question early.

Adding a pet mid-lease: the mechanics

Most pet addenda are signed mid-lease, which is precisely what the instrument is for. The sequence is short. Tenant asks. Landlord decides, and prices the yes. The addendum gets signed and dated by both sides, referencing the lease by its date and address, the pet layer gets paid, and the animal moves in. Nothing in the base lease reopens, and the end date stays put; clause 8 in the template says so in one line.

The signed addendum lives with the lease, not in some separate folder that surfaces two years after move-out. The pet deposit joins the security-deposit accounting, which means the state’s return deadline and itemization rules apply to it on the way out. And the signature itself can be electronic: under the E-SIGN Act, a signature or record cannot be denied legal effect solely because it is in electronic form, per 15 U.S.C. 7001, so the Saturday email exchange can end with a signed PDF by Sunday.

Mistakes that turn a pet addendum into a problem

The recurring failures are nearly all drafting shortcuts. An animal described so loosely the addendum covers any dog the household ever acquires. Money written without its legal name, or a “nonrefundable” label in a state that bans the word. A pet deposit stacked past the state cap because nobody added the two numbers together. Terms silent on what happens when the rules are broken, which leaves the landlord improvising an enforcement path the lease should have carried.

The sharpest mistake is treating an assistance animal as a pet: charging it pet money, or refusing it under a no-pets policy. That one moves the dispute out of landlord-tenant law entirely and into fair-housing territory, where the downside is not a lost deposit argument.

None of this is hard to get right. One page, one named animal, money that matches your state’s table, a violation clause, an assistance-animal line, two signatures. The pet addendum is the rare lease document both sides are usually happy to sign: the tenant gets the dog and the landlord gets paid for the risk. And Biscuit gets a home where the paperwork was done right.

Frequently Asked Questions

What is a pet addendum?

A pet addendum is a signed add-on that lets one named animal live under an existing lease on stated terms: description, deposit or fee or monthly pet rent, care rules, and the consequence if the rules break. Nothing else in the lease moves. What usually triggers one: a no-pets lease meets a tenant who asks, and the verbal yes needs converting into something enforceable. From signing onward it travels with the lease, rides into renewals unless replaced, and its deposit money answers to the same state return rules as the rest of the security deposit.

What is the difference between a pet deposit, a pet fee, and pet rent?

Refundability and timing. A pet deposit is security: refundable, spendable only on actual pet damage, returned with the rest of the deposit under state deadlines. A pet fee is a one-time payment the tenant never gets back, essentially permission money, lawful in some states and not others. Pet rent runs monthly for as long as the animal stays. California collapses the menu. Civil Code 1950.5 reads every charge imposed at the start of the tenancy as security, puts the one-month cap over all of it, and forbids labeling any piece nonrefundable.

How much can a landlord charge for a pet deposit?

Two numbers control it: the state’s general deposit cap, and any pet-specific rule sitting on top. Kansas allows an extra pet deposit of up to half a month’s rent beyond its cap. Nebraska allows a quarter of a month. Hawaii permits a separate pet-animal deposit by agreement alongside its one-month cap, and Delaware caps the pet deposit itself at one month’s rent no matter how long the lease runs. California gives no extra room at all, since pet charges count inside the standard security cap. Elsewhere, pet-specific statutes are rare, and the general deposit limit does the controlling.

Can a landlord charge a pet deposit or pet rent for a service animal?

No. Under the Fair Housing Act’s accommodation framework an assistance animal is not a pet at all, so pet terms have nothing to attach to. Refusing a reasonable accommodation in rules or policies is discrimination under 42 U.S.C. 3604(f)(3)(B), and HUD’s regulation uses the no-pets building and the seeing-eye dog as its textbook example. Delaware goes as far as putting the money rule in statute, barring any pet deposit for a duly certified support animal of a disabled resident. A tenant who ties the animal to a disability-related need is making an accommodation request. Answer it through a written accommodation process; the pet addendum stays in the drawer.

What happens if a tenant gets a pet without permission?

An unpermitted animal violates the no-pets clause, and the violation is the curable kind, so state law takes over the script. Florida names unauthorized pets among its correctable breaches, so the matter runs on the cure-or-quit track: written notice, a statutory window, an eviction filing only if nothing changes. The cure can be rehoming. More often the better deal for everyone is that the tenant signs the pet addendum and pays the deposit. And the landlord who had a published addendum path all along argues from strength, because a legal route was offered and skipped.

Elena Rodriguez

Elena Rodriguez writes about real estate and landlord-tenant law for ClearLegalTips. She focuses on making leases, security deposits, and rental rules understandable for tenants and small landlords handling them without a lawyer.