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Short-term rental rules · Cambridge, Massachusetts

Short-term rentals in Cambridge, explained properly.

Short-term rentals are allowed in Cambridge only as operator-occupied rentals (the operator's primary residence, with up to three bedrooms rented separately) or owner-adjacent rentals (a separate unit in a building of four or fewer units that the operator owns entirely and lives in), in districts where residential use is allowed. Every operator must register with the Inspectional Services Department, pass an inspection and renew the certificate every five years, and hourly rentals are not permitted. The City's guide lists a $500 fee and fines of up to $300 a day, but that guide is dated 2017. State law adds Department of Revenue registration, a 5% state excise and $1,000,000 of liability insurance. A June 2026 City Manager proposal would add a 90-day yearly cap and new rental categories; it is not law. We haven't reviewed the ISD regulations or any City lodging tax yet.

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At a glance

What you need to know before you buy or list

QuestionAnswer
Are short-term rentals allowed?Conditional: allowed only as an operator-occupied rental (the operator's primary residence) or an owner-adjacent rental, as an accessory use in existing dwellings in every district where residential use is allowed [1] [2] Clause 1 Clause 2
Is City short-term rental registration required?Yes: every operator must register with the Inspectional Services Department and hold a certificate of registration before renting; the certificate is renewed every five (5) years or on a change of operator or owner, and ISD inspects before issuing or renewing it [1] [2] [3] Clause 1 Clause 2 Clause 3
Must the operator live on the property as a primary residence?Yes: the operator must live in the rental unit (operator-occupied) or in another unit of the same building (owner-adjacent) as a primary residence; the operator may be the owner, or a tenant who has the owner's written permission [1] [2] Clause 1 Clause 2
Is there a limit on the units and bedrooms one operator can rent?Yes: one (1) dwelling unit for operator-occupied rentals, which may include the separate rental of no more than three (3) individual bedrooms and never more than the unit's lawful bedrooms, plus one (1) dwelling unit for owner-adjacent rentals [1] Clause
Are hourly rentals allowed?No: renting by the hour, or for fewer than ten (10) consecutive hours, is not permitted [1] Clause

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Detailed rules

The full picture, section by section

Operating rules

Do tenant operators need the owner's and condo association's consent?Yes: an operator who is not the owner must give written evidence that the owner and, where there is one, the condominium association consented to the short-term rental use [1] [2] Clause 1 Clause 2

Section 4.67 requires an operator who is not the property owner to provide written evidence that the owner and the condominium association, if applicable, has consented to the short-term rental use of the property, and Section 4.62 defines the operator as the owner or the primary leaseholder with that written permission. The ISD guide goes further than this section's text: it lists written approval from the condominium association and/or building owner among the supporting documents, tells tenants to supply a copy of the lease or rental agreement, and says the ordinance does not override any lease, condominium bylaws or other regulations that bind a tenant, and that the City does not enforce private agreements. The City's page lists a Statement of Responsibility and an Affidavit of Approval of the Property Owner as documents. The guide's wording differs from the ordinance on whether owner-operators need condominium approval; this page follows the ordinance. State law also says it confers no right to rent where an HOA, lease or other agreement prohibits it (see the Massachusetts section).

Are commercial meetings and uses allowed in a short-term rental?No: commercial meetings and uses are prohibited in short-term rentals [1] Clause

Section 4.64(12) of the Zoning Ordinance prohibits commercial meetings and uses in short-term rentals.

Renting bedrooms to separate partiesOwner-adjacent rentals can be rented only as a whole unit to one party at a time; an operator-occupied rental can be rented by the bedroom to separate parties, but if the operator is away for more than seven (7) consecutive days it can be rented only as a whole unit to one party [1] Clause

An owner-adjacent short-term rental may be rented only as a whole unit to one party of short-term renters at any one time and not rented as separate bedrooms to separate parties (Section 4.64(8)). An operator-occupied rental during which the operator is away from the dwelling unit for more than seven (7) consecutive days may be rented only as a whole unit to one party at any one time and not as separate bedrooms to separate parties (Section 4.64(9)).

Liability insuranceRequired: operators must maintain liability insurance appropriate to cover the short-term rental use; the application asks for proof of coverage in an amount the Commissioner approves, or of equal or higher coverage provided by every hosting platform used [1] [2] Clause 1 Clause 2

Section 4.64(7) requires short-term rental operators to maintain liability insurance appropriate to cover the short-term rental use. The ISD guide (version dated November 9, 2017) lists as a supporting document proof of liability insurance in an amount approved by the Commissioner of Inspectional Services, or proof that coverage in an equal or higher amount is provided by all hosting platforms used. State law sets its own minimum insurance amount (see the Massachusetts section).

Information to give renters and postRequired: waste and recycling instructions, an emergency-exit diagram, operator or local emergency contact information and the certificate of registration, given to all renters and posted in owner-adjacent rentals [1] Clause

Section 4.65 says this information shall be provided to all short-term renters and posted in all owner-adjacent rentals in a manner ISD determines: instructions for disposal of waste under the City's recycling and composting programs; an emergency-exit diagram in all bedrooms used for owner-adjacent rentals and on all egresses from the dwelling unit; contact information for the operator, or when the operator is not present, for a locally available contact designated to respond to all emergencies and problems during the rental, whether from renters, neighbors or municipal authorities; and the certificate of registration.

Books and recordsOwner-adjacent operators must keep accurate books and records for three (3) years and make them available to ISD on request [1] Clause

Section 4.65(2) requires the operator of an owner-adjacent short-term rental to keep accurate books and records, make them available upon request of ISD, and keep them for a period of three years.

ParkingShort-term renters are subject to the City's parking regulations, and the operator must tell guests what they are [2] Clause

The ISD guide (version dated November 9, 2017) says all short-term renters are subject to the City of Cambridge parking regulations and that the operator is responsible for informing guests of them.

City and State taxes and feesOperators must remit all fees and taxes the City or State requires; the State excise is shown in the Massachusetts section, and we haven't confirmed whether a local Cambridge excise or fee applies [1] [3] [4] Clause 1 Clause 2 Clause 3Confirming

Section 4.64(6) says operators of short-term rentals shall remit to the appropriate body all fees and taxes as required by the City and/or State authorities. The City's registration page says State law requires registration of short-term rentals and payment of State excise tax. We haven't reviewed Cambridge's acceptance of the local room occupancy excise or the community impact fee that State law allows cities to adopt, so this page gives no City rate. Section 3B of chapter 64G names Cambridge among the cities where the convention center financing fee on short-term rental occupancies is split between the General Fund and the city, and section 14A of the 2018 act delays that section until the Commonwealth has paid off certain bonds; we haven't confirmed the fee's rate or whether it applies yet. This page does not total City and State taxes.

Fees, penalties & enforcement

Registration fee$500 for the certificate of registration, or $100 a year over five (5) years on a payment plan; this comes from a guide dated November 9, 2017, so confirm the current fee with ISD [2] ClauseConfirming

The ISD Short-Term Rental Guide, a City publication versioned 11/09/2017, says the fee to obtain a certificate of registration is $500, payable when the application is filed, or on a payment plan of $100 a year over five (5) years with the first $100 due when the application is filed and the certificate issued subject to the annual payment. It says failure to pay will result in immediate revocation of the certificate. We haven't reviewed a dated fee schedule for the current fee yet.

Fines for violationsViolations of the Short-Term Rental Ordinance are subject to fines of up to $300 a day, according to the ISD guide (version dated November 9, 2017) [2] [3] [5] Clause 1 Clause 2 Clause 3Confirming

The ISD guide says code violations or any violations of the Short-Term Rental Ordinance will be subject to fines of up to $300/day, and that ISD investigates complaints about occupancy conditions or other violations. Complaints about a specific property can be made on the SeeClickFix reporting website, per the City's page. A pending proposal would write a $300 per violation per day fine into the ordinance itself (see Recent and pending changes).

State law that also applies

Massachusetts room occupancy excise on short-term rentals5% state excise on the total rent for each short-term rental occupancy, unless the rent is under $15 a day; a city or town that accepts the local option may add up to 6% (Boston up to 6.5%) and, by separate vote, a community impact fee of up to 3% on professionally managed units [6] [7] [4] [8] Clause 1 Clause 2 Clause 3 Clause 4

Chapter 64G section 3 imposes an excise of 5 per cent of the total amount of rent for each occupancy of a short-term rental, with no excise if the total rent is less than $15 per day, payable by the operator to the commissioner of revenue when the operator files the return under chapter 62C section 16. No excises or fees under the chapter apply if the operator transfers the short-term rental for not more than 14 days in a calendar year, but only if the operator first registered with the commissioner and filed a signed declaration (required annually) of the intent to do so; an operator who transfers it for 15 days or more, or who does not register and file the declaration, owes the excise and fees, including on the first 14 days. Section 3A lets a city or town that accepts it by vote impose a local excise of not more than 6 per cent of the rent (Boston, 6.5 per cent), which the operator pays to the commissioner together with the State excise. Section 3D lets a city or town that accepted section 3A impose, by separate vote, a community impact fee of not more than 3 per cent of the rent on professionally managed units, and by a further vote on units in a two- or three-family dwelling that includes the operator's primary residence, with at least 35 per cent of the proceeds dedicated to affordable housing or local infrastructure. Section 3C adds a 2.75 per cent excise in municipalities that belong to the Cape Cod and Islands Water Protection Fund. Under section 14 of the 2018 act, sections 3, 3A, 3C and 3D apply to occupancies that start on or after July 1, 2019 under contracts entered on or after January 1, 2019. Which cities and towns have accepted the local options is shown on each place's page where official sources show it. This page does not combine these rates into one total.

Must short-term rental operators register with the Massachusetts Department of Revenue?Yes: no one may operate a short-term rental unless the commissioner of revenue has issued a certificate of registration under chapter 62C section 67 [4] [8] [6] Clause 1 Clause 2 Clause 3

Section 6 of chapter 64G, as enacted by chapter 337 of the Acts of 2018 (approved December 28, 2018), says a person shall not operate a bed and breakfast establishment, hotel, lodging house, short-term rental or motel unless a certificate of registration has been issued under section 67 of chapter 62C. The chapter defines a short-term rental as an owner-occupied, tenant-occupied or non-owner occupied property, including an apartment, house, cottage or condominium, where at least one room or unit is rented to an occupant and all accommodations are reserved in advance, and counts occupancy of a room in a short-term rental normally used for sleeping and living purposes for not more than 31 consecutive calendar days. An operator who transfers the rental for not more than 14 days in a calendar year must still register and file an annual declaration to qualify for the excise exemption. An intermediary that collects rent for an operator must obtain the certificate in the operator's name. A city or town may accept the State certificate in place of a local license or registration. We haven't reviewed the text of chapter 62C section 67 yet.

Is liability insurance required for short-term rental operators?Yes: at least $1,000,000 of liability insurance for each short-term rental, unless it is offered through a hosting platform that maintains equal or greater coverage [9] Clause

Chapter 175 section 4F(b) requires an operator to maintain liability insurance of not less than $1,000,000 to cover each short-term rental, unless the rental is offered through a hosting platform that maintains equal or greater coverage. The coverage must defend and indemnify the operator and any tenants or owners in the building for bodily injury and property damage arising from the short-term rental. A hosting platform must tell the operator, before the operator offers a rental through it, that standard homeowners or renters insurance may not cover third-party property damage or bodily injury. An operator who intends to run a short-term rental must notify any insurer that writes a homeowners or renters policy for the property.

Does state law let cities and towns regulate short-term rentals?Yes: a city or town may regulate registered operators by ordinance or by-law, including the location and class of operators, the number of licenses or permits and the number of days a year a unit may be rented, and may require registration or licensing, inspections and fees and set civil penalties [4] Clause

Section 14 of chapter 64G, as enacted by chapter 337 of the Acts of 2018, lets a city or town by ordinance or by-law regulate operators registered with the Department of Revenue and impose penalties. Among the listed powers, it may regulate the existence or location of operators, the class of operators, the number of local licenses or permits and the number of days a person may operate and rent out an accommodation in a calendar year; require licensing or registration (accepting the State certificate in its place, or issuing a provisional license for temporary or seasonal use); require operators to show there is no outstanding building, fire, health or zoning enforcement; require health and safety inspections at the operator's cost; set a civil penalty (telling the commissioner of revenue when it suspends or ends an operator's right to operate); and set a reasonable fee for local administration. Operators must also post inside the unit the location of fire extinguishers, gas shut-off valves, fire exits and fire alarms. A city or town may publish a public registry of registered short-term rentals. The sources reviewed are the 2018 act as passed and individual codified sections; we haven't reviewed the current codified text of section 14 or any Massachusetts agency pages.

Can an HOA, condo agreement or lease still bar short-term rentals?Yes: chapter 64G gives no right to offer a residential unit as a short-term rental where a homeowner's association agreement or requirements, a rental agreement or any other restriction, covenant or enforceable agreement prohibits it [4] Clause

Section 15 of chapter 64G, as enacted by chapter 337 of the Acts of 2018, says nothing in the chapter confers a right to lease, sublease or otherwise offer a residential unit as a short-term rental where that use is prohibited by a homeowner's association agreement or requirements, a rental agreement or any other restriction, covenant, requirement or enforceable agreement. Section 16 adds that for residential units subject to rent control, operators of short-term rentals shall charge not more than the prorated maximum amount allowed.

Can booking platforms collect and remit the state excise for hosts?Yes, if the operator chooses it in a written agreement: the platform (an intermediary) then collects the rent, reports and remits the excise and must register in the operator's name [4] [8] Clause 1 Clause 2

Section 13(a) of chapter 64G, as enacted by chapter 337 of the Acts of 2018, lets an operator elect, by written agreement, to allow an intermediary to collect rent or facilitate its collection or payment. The chapter defines an intermediary to include a hosting platform and an operator's agent. An intermediary with such an agreement must apply for and obtain a certificate of registration from the commissioner on the operator's behalf, assess, collect, report and remit the excise, remit any community impact fee to the municipality, keep records, and make sure the operator is registered before allowing the operator to list a rental through it. The certificate must be in the name of the individual operator, not the intermediary. Check with the platform and the Department of Revenue to confirm whether a platform collects the excise for you.

Changes

Recent and pending changes

We read Section 4.60 of the Cambridge Zoning Ordinance (Article 4 as posted by the City, and Ordinance 1397 as adopted on August 7, 2017), the Inspectional Services Department's Register a Short-Term Rental page (last modified June 7, 2024), its Short-Term Rental Guide (version dated November 9, 2017) and the City Manager's June 22, 2026 response proposing amendments (CMA 2026-188). The City says the ordinance has not been amended since it took effect on April 1, 2018. We haven't reviewed the ISD short-term rental regulations, the registration forms or a current fee schedule, any local lodging tax, or City Council and Planning Board agendas and minutes yet, so we will watch the Zoning Ordinance, the ISD page and the amendment proposal for changes.

Aug 7, 2017
Ordinance 1397, Zoning Ordinance Section 4.60 Short-Term RentalsEnacted [10] [5] Clause 1 Clause 2

The City Council passed Ordinance 1397 on August 7, 2017 (9 yeas, 0 nays), adding Section 4.60 to the Zoning Ordinance. The section took effect on April 1, 2018, with registration applications accepted from October 1, 2017. The City says it has not been amended since.

Aug 27, 2025
2025 zoning petition to amend Section 4.60 lapsedStalled [5] Clause

A Law Department and ISD zoning petition to update the definitions, add habitability and documentation requirements and add fines or registration revocation was favorably recommended by the Planning Board, but the Ordinance Committee allowed it to lapse on August 27, 2025, and the Council then issued a policy order asking the City Manager for further recommendations.

Jun 22, 2026
City Manager proposal CMA 2026-188 to amend Section 4.60 (proposed, not law)Proposed [5] Clause

On June 22, 2026 the City Manager sent the City Council proposed amendments to Section 4.60 and recommended forwarding them as a zoning petition to the Planning Board and Ordinance Committee. The draft would add an autonomous unit category, new definitions, registration of booking agents and platforms, a $300 per violation per day fine, and, at two councilors' request, a limit of ninety (90) days per calendar year on rentals. Until the Council adopts it, the current Section 4.60 is the law in force.

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This page is general information compiled from public sources, not legal or tax advice. HOA rules, deed restrictions and zoning for a specific property can be stricter. Confirm with the local permitting office and a qualified professional before buying or listing a property.