Newton, MA Accessory Structures: ADU Rental Restrictions (2026)
Key Facts
- Minimum rental term
- 30 days for ADU or principal dwelling
- Applies to
- Both the ADU and the principal unit
- One ADU per lot
- Sec. 6.7.1(C)(2)
- No separate ownership
- ADU cannot be sold apart from main house
- Governing section
- Chapter 30 Zoning Ordinance Sec. 6.7.1(C)(4)
- General zoning fine
- Up to $300 per day (Sec. 7.9.2)
Summary
Newton's accessory dwelling unit ordinance bars short-term rentals: under Sec. 6.7.1(C)(4), whenever the ADU or the principal dwelling it serves is rented out, the minimum occupancy or rental term is 30 days, so nightly or weekly rentals of either unit are off the table for any ADU-bearing property.
4. Where the Accessory Dwelling Unit or the principal dwelling is occupied as a rental unit, the minimum occupancy or rental term shall be 30 days;
Full Breakdown
Sec. 1 governs Accessory Dwelling Units citywide, and subsection C, 'Rules for All Accessory Dwelling Units,' sets the conditions that apply no matter whether the ADU is internal to the principal house or a separate detached structure. Sec. 1(C)(4) provides that where the Accessory Dwelling Unit or the principal dwelling is occupied as a rental unit, the minimum occupancy or rental term shall be 30 days. Because the rule reaches both halves of the property, an owner who adds an ADU cannot then turn around and rent out the main house on a nightly or weekly basis either; both units are locked into the same 30-day floor once the property has an ADU on it.
The same subsection also bars separate ownership of the ADU from the principal structure (Sec. 1), caps the property to one ADU per lot (Sec. 2), and requires the property owner to record a certified copy of the ADU decision with the Registry of Deeds for the Southern District of Middlesex County before a Certificate of Occupancy issues (Sec. 7), all conditions enforced by the Commissioner of Inspectional Services, who keeps the master list of ADUs required under Sec. 7.
Violations & Fines
Renting an ADU or the principal dwelling on a term shorter than 30 days violates Sec. 6.7.1(C)(4) and, like any Chapter 30 violation, is punishable under Sec. 7.9.2 by a fine of not more than $300 for each day the violation continues. The Commissioner of Inspectional Services investigates on a citizen's written complaint or on the Commissioner's own initiative and may seek a district court complaint or superior court injunction to stop the rental.
Frequently Asked Questions
Can a Newton homeowner rent their ADU out on Airbnb for a weekend?
Does the 30-day minimum also apply if the ADU owner rents out the main house instead?
What happens if a Newton ADU is rented short-term anyway?
Sources & Official References
Other rules in Newton
Compare Newton to another location·View the Massachusetts accessory structures overview
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