Night Caps: Ayer vs Somerville
How do night caps rules compare between Ayer, MA and Somerville, MA?
Ayer and Somerville have similar restriction levels.
Ayer, MA
Middlesex County
Several Middlesex County cities cap annual STR rental nights for non-owner-occupied units, with Cambridge limiting non-primary rentals and Somerville permitting owner-adjacent STRs under residency rules.
View full Ayer rules →Somerville, MA
Middlesex County
Somerville does not impose a fixed annual night cap on owner-occupied STRs, but non-owner-occupied STRs face significant restrictions that effectively limit commercial STR activity.
View full Somerville rules →Key Facts Comparison
| Fact | Ayer | Somerville |
|---|---|---|
| Cambridge | Primary residence required | - |
| Somerville | Owner-occupancy rules | - |
| Typical suburban cap | 90 to 180 nights | - |
| Investor STRs | Banned in Cambridge | - |
| Enforcement | Annual registration | - |
| Annual Cap | - | No fixed night cap |
| Key Limit | - | Owner-occupancy required |
| Non-Owner STR | - | Heavily restricted |
| Condo Rules | - | May ban independently |
| Contact | - | Somerville 311 or (617) 625-6600 |
Highlighted rows indicate differences between cities.
Ayer FAQ
Is there a night cap on STRs in Cambridge?
Cambridge does not use a night cap but instead requires primary residence operation. Non-owner-occupied investor STRs are prohibited in Cambridge.
Can I rent my vacation home year-round?
In most Middlesex towns with STR ordinances, non-primary residence STRs are either capped at 90 to 180 nights per year or prohibited entirely. Check your local bylaw.
Somerville FAQ
Can I rent my Somerville home year-round on Airbnb?
Only if it remains your primary residence. Moving out and renting the whole unit year-round converts it to non-owner-occupied and is prohibited in most zones.
Will Somerville add a night cap later?
Possibly. The city periodically reviews STR rules. Check the ordinance on eCode360 and monitor City Council agendas for amendments.
Compare other topics
See how Ayer and Somerville compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool