Occupancy Limits: Cambridge vs Somerville
How do occupancy limits rules compare between Cambridge, MA and Somerville, MA?
Cambridge and Somerville have similar restriction levels.
Cambridge, MA
Middlesex County
Cambridge STRs are limited by building code occupancy based on bedrooms and square footage, and units must be the operator primary residence occupied at least 9 months per year.
View full Cambridge rules →Somerville, MA
Middlesex County
Somerville STR occupancy follows MA Sanitary Code 105 CMR 410 room-size standards, typically allowing two guests per bedroom plus additional occupants based on square footage.
View full Somerville rules →Key Facts Comparison
| Fact | Cambridge | Somerville |
|---|---|---|
| Occupancy Standard | 2 per bedroom plus 2 | - |
| Primary Residence | 9 months minimum | - |
| Building Code | 780 CMR applies | - |
| Listing Disclosure | Maximum occupancy required | - |
| Enforcement | ISD | - |
| State Code | - | 105 CMR 410 minimums |
| Rule of Thumb | - | 2 guests per bedroom |
| First Occupant | - | 150 sq ft living space |
| Each Additional | - | 100 sq ft |
| Contact | - | Somerville 311 or (617) 625-6600 |
Highlighted rows indicate differences between cities.
Cambridge FAQ
How many guests can I host?
Typically 2 per bedroom plus 2 additional, subject to building code minimum square footage.
What counts as primary residence?
The operator must occupy the dwelling as their primary residence at least 9 months per year.
Somerville FAQ
Can I list my 2-bedroom Somerville condo for 6 guests?
Only if the total square footage supports it under 105 CMR 410 and egress is adequate. Most 2-bedroom condos realistically support 4 guests. Inspectional Services can confirm your specific unit.
Do infants count toward occupancy?
Under 105 CMR 410, children under one year old generally do not count, but older children do. Check with ISD for your specific situation.
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