Pet Policy Clause
in Your Lease
What it actually means, what Massachusetts law says, what's specific to Boston - and exactly what to do. In plain English.
Quick Summary - What You Need to Know
- M.G.L. c. 186 § 15B(1)(b) limits what a lessor may require at or before the start of a tenancy to four amounts, and a pet deposit or pet fee is not one of them.
- The four are the first full month's rent, the last full month's rent at the same rate, a security deposit equal to the first month's rent, and the purchase and installation cost of a key and lock.
- The Attorney General's Guide to Landlord and Tenant Rights states that landlords may not charge up-front pet fees, and 940 CMR 3.17(4)(a) makes requiring more than the § 15B list an unfair or deceptive practice under G.L. c. 93A.
- § 15B(4) allows deductions only for unpaid rent or water charges, a conforming tax-escalation increase, and reasonable repair of tenant-caused damage beyond reasonable wear and tear - and says no deduction may be made for any other purpose.
- § 15B(8) voids a lease provision that conflicts with the section, so signing a pet-deposit line does not make it enforceable.
Understanding the Pet Policy Clause
A pet policy clause decides three things: whether the animal is allowed, what it costs you at signing, and what it costs you every month afterwards. In Boston the middle question has an unusually clean answer, and it is not buried in case law.
Massachusetts wrote a closed list. M.G.L. c. 186 § 15B(1)(b) sets out what a lessor may require at or prior to the commencement of a tenancy, and it names four amounts - first month's rent, last month's rent at the same rate, a security deposit equal to the first month's rent, and the cost of a key and lock.
A pet deposit is not the fifth item, because there is no fifth item. The Attorney General's own guide says the same thing in plainer words: landlords may not charge up-front pet fees.
What renters assume
Renters read a pet deposit as the ordinary price of bringing a dog into a tight Boston market - a line beside the security deposit, added on top of it.
What is actually true
§ 15B(1)(b) is a closed list of four amounts collectible at or before the start of the tenancy, and a pet deposit or pet fee is not among them. § 15B(8) voids a lease term that conflicts with the section, so a signature does not rescue the charge.
One row on this chart carries a dollar figure: Denver's $300 pet deposit cap. Every other row is a dashed track, and those split into two shapes. Austin, Miami, Chicago, Nashville and Philadelphia read no cap, and Seattle reads no dollar cap, while Los Angeles, New York City and Boston count pet money inside a one month's rent ceiling, Phoenix inside one and a half months, Atlanta inside two, and Portland inside a one-month city cap.
Boston's place in that second group comes from the sharpest version of the rule on this chart. The other cities in it get there by squeezing pet money into a general deposit ceiling; Massachusetts gets there by naming the four amounts collectible at move-in and leaving a pet charge off the list entirely. Read the chart as a map of which government answers the amount question and how, not as a ranking of who is cheapest.
Plain English Version
Think of move-in money in Massachusetts as four labelled envelopes rather than an open collection: first month, last month, a security deposit no bigger than one month's rent, and the cost of a key and lock. A pet deposit has no envelope of its own, and the law does not hand out a fifth. What the lease charges you every month is a separate question, and § 15B is about what changes hands at or before the start of the tenancy.
Pet Clause Example - What the Wording Looks Like in Boston, MA
The sample clause below is real lease language - a court quoted it word for word, and then ruled on it. What the judge decided is at the bottom of this block.
Find the equivalent paragraph in your own lease and read the two side by side. The wording will differ; the moving parts rarely do.
No pets are allowed in the building or on the Premises at any time. Tenants may be assessed labor cleanup charges (if applicable) for each violation. Tenants agree to an increase in the rental deposit up to the maximum allowed by law in the events of non-compliance with pet prohibitions. Reasonable accommodations accepted.
Quoted from the published opinion in Cohen v. Clark, 945 N.W.2d 792 (Iowa 2020). Judicial opinions are not subject to copyright; the lease language is reproduced in limited part for commentary under 17 U.S.C. § 107.
“in the building or on the Premises at any time”
That is the whole property, and the whole tenancy. What our Massachusetts record fixes is not that reach but the money. G.L. c. 186, § 15B(1)(b) limits what a lessor may require at or before the start of a tenancy to four amounts: rent for the first full month, rent for the last full month at the same rate, a security deposit equal to the first month's rent, and the cost of a key and lock. A pet deposit or pet fee is not among the four.
“assessed labor cleanup charges (if applicable) for each violation”
A per-incident charge must clear the deduction rule. § 15B(4) allows deductions only for unpaid rent or water charges, an unpaid tax-escalation increase under § 15C, and a reasonable amount to repair tenant-caused damage beyond reasonable wear and tear; no deduction may be made for any purpose other than those set out in the section. Cleaning after an animal can be damage beyond wear and tear; the section measures a reasonable repair amount, not a fixed sum per violation.
“an increase in the rental deposit”
That promise is closed in Massachusetts. The deposit may equal the first month's rent and no more, and § 15B(1)(d) bars demanding a larger one later, so an agreed increase has nowhere to go. The same sentence buys more elsewhere on this chart: two months' rent in Atlanta under O.C.G.A. § 44-7-30.1, one and a half in Phoenix under A.R.S. § 33-1321(A). What § 15B governs is the money required at or before the start of the tenancy, and a larger deposit demanded during it.
“Reasonable accommodations accepted”
An assistance animal is not a pet, and Massachusetts routes the request through G.L. c. 151B. The Massachusetts Commission Against Discrimination stated on July 31, 2026 that a housing provider must still evaluate a reasonable-accommodation request individually and engage in an interactive process, and that assistance animal covers service animals and other trained or untrained animals that provide support, including emotional support. Cohen is the warning on the far side of these words: the landlord there did accept an accommodation, and the tenant who had signed first in reliance on the ban won anyway.
The no-pets clause was enforced - for the tenant who relied on it. A renter with a severe dog allergy signed first, in reliance on this clause. The landlord later waived it so a neighbour could keep an emotional support dog. The Iowa Supreme Court held that waiver was not a reasonable accommodation: the allergic tenant had priority in time, and the dog was a direct threat to her health that air purifiers and separate stairwells did not fix. She recovered on the no-pets clause and on the covenant of quiet enjoyment, and the case was sent back for damages of one month's rent. The point renters miss: an accommodation request is weighed against everyone in the building, not just against the landlord.
One court, one lease, one state. That answer is not automatically yours, and your lease may be worded to land differently. Use this to know what to look for and what to ask - your state's tenant hotline or a local tenant attorney can answer it for your document.
Massachusetts Law on Pet Policy Clause
- G.L. c. 186 § 15B(1)(b) limits what a lessor may require at or prior to the commencement of any tenancy to four amounts: rent for the first full month of occupancy, rent for the last full month at the same rate, a security deposit equal to the first month's rent, and the purchase and installation cost for a key and lock. A pet deposit or pet fee is not among the four.
- The Attorney General's Guide to Landlord and Tenant Rights states that landlords may not charge tenants or prospective tenants up-front pet fees, broker fees, or application fees at the start of a tenancy, and 940 CMR 3.17(4)(a) makes requiring more than the § 15B list an unfair or deceptive practice under G.L. c. 93A.
- Section 15B(4) permits deductions only for unpaid rent or water charges, an unpaid tax-escalation increase conforming to § 15C, and a reasonable amount to repair tenant-caused damage beyond reasonable wear and tear, and states that no deduction may be made for any purpose other than those set out in the section; § 15B(8) voids any conflicting lease provision, and § 15B(7) awards three times the deposit plus 5 percent interest, court costs and attorney's fees for the failures listed in § 15B(6)(a), (d) and (e).
- Assistance animals run through G.L. c. 151B: the Massachusetts Commission Against Discrimination stated on July 31, 2026 that state law still requires a housing provider to evaluate a reasonable-accommodation request individually and engage in an interactive process, and that "assistance animal" is an umbrella term covering service animals as well as other trained or untrained animals that provide support, including emotional support.
M.G.L. c. 186 § 15B(1)(b) - statutes change; verify the current text for your situation.
Massachusetts answers the pet-money question with a list rather than a cap. M.G.L. c. 186 § 15B(1)(b) limits what a lessor may require at or prior to the commencement of any tenancy to four amounts: rent for the first full month of occupancy, rent for the last full month at the same rate, a security deposit equal to the first month's rent, and the purchase and installation cost for a key and lock.
That list is exhaustive, which is what makes it useful at the signing table. A pet deposit or pet fee is not one of the four, and § 15B(1)(d) also bars demanding a larger deposit later in the tenancy, so the charge cannot simply be moved a month down the calendar.
The Attorney General's Guide to Landlord and Tenant Rights states outright that landlords may not charge tenants or prospective tenants up-front pet fees, broker fees or application fees at the start of a tenancy. 940 CMR 3.17(4)(a) makes requiring more than the § 15B list an unfair or deceptive practice under G.L. c. 93A, which is the consumer-protection route behind the guide's plain sentence.
Deposit money that is properly collected is then fenced in. § 15B(4) permits deductions only for unpaid rent or water charges, an unpaid tax-escalation increase conforming to § 15C, and a reasonable amount to repair damage caused by the tenant beyond reasonable wear and tear, and it states that no deduction may be made for any purpose other than those set out in the section.
Two more subsections do the enforcing. § 15B(8) voids any lease provision that conflicts with the section, and § 15B(7) awards three times the deposit plus 5 percent interest, court costs and attorney's fees for the failures listed in § 15B(6)(a), (d) and (e).
One thing this section does not reach is the monthly line. § 15B governs what may be required at or prior to the commencement of the tenancy, so it is the wrong place to look for an answer about ongoing pet rent, and nothing here should be read as settling that question either way.
Massachusetts Tenant Protections
M.G.L. c. 186 § 15B(1)(b) limits what a lessor may require at or prior to the commencement of any tenancy to four amounts - rent for the first full month, rent for the last full month at the same rate, a security deposit equal to the first month's rent, and the purchase and installation cost for a key and lock - and a pet deposit or pet fee is not among them.
The Attorney General's Guide to Landlord and Tenant Rights states that landlords may not charge up-front pet fees, and 940 CMR 3.17(4)(a) makes requiring more than the § 15B list an unfair or deceptive practice under G.L. c. 93A.
Section 15B(4) permits deductions only for unpaid rent or water charges, a tax-escalation increase conforming to § 15C, and reasonable repair of tenant-caused damage beyond reasonable wear and tear, and says no deduction may be made for any other purpose; § 15B(8) voids a conflicting lease provision and § 15B(7) awards three times the deposit plus 5 percent interest, court costs and attorney's fees for the failures listed in § 15B(6)(a), (d) and (e). Assistance animals run through G.L. c.
151B: the Massachusetts Commission Against Discrimination stated on July 31, 2026 that state law requires a housing provider to evaluate a reasonable-accommodation request individually and engage in an interactive process, and that "assistance animal" is an umbrella term covering service animals as well as other trained or untrained animals that provide support, including emotional support.
What's Specific to Boston
Figures are the state rule, or the stronger city ordinance where one exists. Verify the current law for your own situation before relying on it.
Our record finds no Boston ordinance setting a pet deposit, pet fee or pet rent limit, so G.L. c. 186 § 15B is what governs what may be collected from Dorchester to Charlestown. That is a smaller gap than it sounds, because the state rule already does the work an ordinance would be written to do.
What the city adds sits around the unit rather than around the animal. Boston Mun. Code 9-1.3(C)(1) requires all owners of private residential rental units, including condominium units, to register with the Inspectional Services Department by July 1 each year, identifying the property by street address and the number of units owned there.
That is not pet law, and it does not change a dollar of what your landlord may charge. It is worth knowing anyway, because a landlord who cannot answer a registration question is a landlord whose move-in paperwork deserves a second read before you hand over four months of anything.
The practical Boston problem is the template. Large management companies run national lease forms drafted for states that allow a pet fee, so a "pet fee, nonrefundable" line arrives in a market where § 15B(1)(b) names four collectible amounts and that is not one of them.
§ 15B(1)(b) names first month's rent, last month's rent at the same rate, a security deposit equal to the first month's rent, and the cost of a key and lock. Anything else at signing is a question worth asking in writing.
The deposit item on the list is capped at the first month's rent. Adding pet money to it is one way a charge that is not on the list gets in through the side door.
A pet deposit or pet fee is not one of the four amounts in § 15B(1)(b), and the Attorney General's guide states that landlords may not charge up-front pet fees.
§ 15B(4) limits deductions to unpaid rent or water charges, a conforming tax escalation, and reasonable repair of tenant-caused damage, and says no deduction may be made for any other purpose.
Sources
The law this guide relies on, and where to read it. Statutes change, so confirm the current text before you act on it.
- M.G.L. c. 186 § 15B(1)(b), read on mass.gov. Massachusetts publishes the official text at malegislature.gov.
Red Flags to Watch Out For
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A pet deposit collected at move-in
§ 15B(1)(b) lists four amounts a lessor may require at or before the start of a tenancy, and a pet deposit is not one of them. Ask which of the four the charge is meant to be.
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A nonrefundable pet fee on the lease
The Attorney General's Guide to Landlord and Tenant Rights states that landlords may not charge up-front pet fees, and 940 CMR 3.17(4)(a) treats requiring more than the § 15B list as an unfair or deceptive practice under G.L. c. 93A.
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A bigger deposit demanded later
§ 15B(1)(d) bars demanding a larger deposit later in the tenancy. A pet charge that reappears as a mid-lease deposit top-up runs into that subsection.
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Open-ended deduction language for pet damage
§ 15B(4) permits deductions only for unpaid rent or water charges, a conforming tax escalation, and reasonable repair of tenant-caused damage beyond reasonable wear and tear, and says no other purpose qualifies.
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A clause that says you agreed to it
§ 15B(8) voids any lease provision that conflicts with the section. A pet-money term does not become collectible because it was printed above your initials.
Your Rights as a Boston Tenant
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A closed list at move-in
§ 15B(1)(b) limits what may be required at or before the start of the tenancy to first month's rent, last month's rent at the same rate, a security deposit equal to the first month's rent, and the cost of a key and lock.
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No up-front pet fee
The Attorney General's Guide to Landlord and Tenant Rights states that landlords may not charge tenants or prospective tenants up-front pet fees, broker fees or application fees at the start of a tenancy.
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Deductions only for what the section lists
§ 15B(4) allows unpaid rent or water charges, a tax-escalation increase conforming to § 15C, and reasonable repair of tenant-caused damage - and no deduction for any other purpose.
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A remedy with teeth
§ 15B(8) voids a conflicting lease provision, and § 15B(7) awards three times the deposit plus 5 percent interest, court costs and attorney's fees for the failures listed in § 15B(6)(a), (d) and (e).
What To Do - Step by Step
Write out every pet charge separately
Deposit, one-time fee, monthly line, plus the breed, weight and headcount terms. They are usually spread across the lease and a separate pet addendum.
Test the move-in charges against the four
First month's rent, last month's rent at the same rate, a security deposit equal to the first month's rent, and the cost of a key and lock. § 15B(1)(b) names those and stops.
Ask which of the four a pet charge is
Put the question in email before the money leaves your account, and keep the reply. A charge nobody can place on the list is a charge worth pressing on.
Read the deduction language against § 15B(4)
It permits unpaid rent or water charges, a conforming tax escalation, and reasonable repair of tenant-caused damage beyond reasonable wear and tear, and no other purpose.
Photograph the unit with the animal in mind
Floors, trim, carpet, door frames and screens, at move-in and again once the place is empty. Tenant-caused damage beyond reasonable wear and tear is the line those photos argue over.
Escalate outside the building
Raise it with the Attorney General's office, whose guide states landlords may not charge up-front pet fees, or with a local legal aid office. § 15B(7) carries three times the deposit plus 5 percent interest, court costs and attorney's fees for the failures the section lists.