STR rules · verified 1mo ago
Short-term rental rules in Cambridge, MA
The City of Cambridge, Massachusetts (Middlesex County, home of Harvard and MIT, immediately across the Charles River from Boston) regulates short-term rentals through the Inspectional Services Department and the Cambridge Zoning Ordinance, materially amended June 23 2025 (cma2025176). Cambridge runs a TWO-CATEGORY system that effectively bans absentee-investor STRs: (1) OPERATOR-OCCUPIED — the operator must live in the STR unit as a primary residence and may rent out at most three legal bedrooms, vacating for no more than 7 consecutive days; if absence exceeds 7 days, the whole unit may be rented to ONE party for the entire absence; (2) OWNER-ADJACENT — the operator lives in a unit adjacent to the STR unit as primary residence and owns ALL other units in a building containing at most 4 dwelling units; the STR must be rented as a WHOLE unit only (no individual-bedroom rentals). New State law (MA Ch. 337 of Acts of 2018) imposes DOR registration + $1M liability insurance + 5.7% state + Cambridge local option (currently 6%) = 11.7% room occupancy excise. Cambridge does NOT levy the Cape Cod Water Protection Fund 2.75% surcharge. Cambridge city fines for non-compliance run $300/day per violation.
What's behind the sign-in
- Registration fees — initial + annual renewal cost, per permit type
- Permit caps + waitlists — exact cap values, current waitlist counts
- Owner-occupancy rules — days/year requirement, permit-class splits
- Zoning carve-outs — which districts allow / disallow STR
- Tax stack — TOT, hotel, county + state layers
- Stay limits — min/max nightly, max nights/year
- Operational requirements — parking, insurance, fire inspection, neighbor notice
- Penalties — per-night fines, revocation thresholds
- City-specific gotchas — HOA carve-outs, pending legislation, recent court rulings
- Refresh on demand — re-run the agentic pipeline against the city's current ordinance
Frequently asked
Are short-term rentals legal in Cambridge, MA?
Cambridge is currently restricted for short-term rentals. Permitted but with material constraints — caps, owner-occupancy rules, zoning carve-outs, or active ordinance review. For the actual fees, caps, owner-occupancy rules, and city-specific gotchas, sign in.
Do I need a permit to run an Airbnb in Cambridge?
Almost certainly yes — almost every U.S. city now requires a short-term rental permit, vacation rental permit, or transient lodging permit before you can legally list. The specifics for Cambridge (cost, renewal cycle, required documents) are behind sign-in. You can also read the source ordinance directly: https://www.cambridgema.gov/iwantto/registerashorttermrental.
What happens if I rent without a permit in Cambridge?
Most cities charge per-night fines (a few hundred to a few thousand dollars per violation), escalating to cease-and-desist letters and platform delisting on repeat. Airbnb and Vrbo now share permit-validation feeds with most major cities, so unpermitted listings get blocked at the platform level. Sign in to see the specific penalty schedule for Cambridge.
How current is this data for Cambridge?
This record was verified 1mo ago against the city's published ordinance (.gov or the city's official municipal-code publisher). Cached cities re-verify on a cadence — daily for cities under active legislation, weekly otherwise. Signed-in users can hit Refresh on any city to force a fresh pull. If you're underwriting a deal, always confirm against the city's code-enforcement office before closing.
Can my HOA or condo association ban STRs even if Cambridge allows them?
Yes. City permits authorize you under municipal law, but your HOA, condo association, or co-op board sets contractual rules that override the city for your unit. Many HOAs adopted blanket STR bans between 2018 and 2024 in response to neighbor complaints. Read the CC&Rs, bylaws, and rental addendums before you buy with an STR plan — the city saying yes does not mean your building says yes.