ADU Rules: Holbrook vs Weymouth
How do adu rules rules compare between Holbrook, MA and Weymouth, MA?
Holbrook and Weymouth have similar restriction levels.
Holbrook, MA
Norfolk County
Massachusetts 2024 Affordable Homes Act (MGL c. 40A §3) grants property owners the right to build ADUs on owner-occupied lots by right. Cities and towns cannot ban ADUs but may regulate size (up to 900 sq ft for internal ADUs). Norfolk County has no additional ADU rules.
View full Holbrook rules →Weymouth, MA
Norfolk County
Weymouth Town Council passed ADU Ordinance Amendment (Measure 24-119) adding Article 29 to Chapter 120. ADUs are allowed by right on single-family lots up to 900 sq ft or 50% GFA. Lots under 5,000 sq ft are ineligible.
View full Weymouth rules →Key Facts Comparison
| Fact | Holbrook | Weymouth |
|---|---|---|
| State Law | MGL c. 40A §3 — Affordable Homes Act 2024 | - |
| ADUs by Right | Yes — on owner-occupied single-family lots | - |
| Max Size (Internal) | Up to 900 sq ft (municipalities may limit) | - |
| Bans Allowed? | No — cities cannot ban ADUs under new state law | - |
| County ADU Rule? | None — regulated by state law and each town | - |
| Code Section | - | Weymouth Code Ch. 120, Art. 29 (Measure 24-119) |
| Max Size (small lots) | - | 750 sq ft (lots under 25,000 sq ft) |
| Max Size (large lots) | - | 900 sq ft (lots over 25,000 sq ft) |
| Ineligible Lots | - | Under 5,000 sq ft |
| Parking | - | 1 space (waived within 0.5 mi of transit) |
Highlighted rows indicate differences between cities.
Holbrook FAQ
Can I build an ADU on my property in Norfolk County?
Massachusetts 2024 Affordable Homes Act (MGL c. 40A §3) grants property owners the right to build ADUs on owner-occupied lots by right. Cities and towns cannot ban ADUs but may regulate size (up to 900 sq ft for internal ADUs). Norfolk County has no additional ADU rules.
What are the size limits for an accessory dwelling unit in Norfolk County?
State Law: MGL c. 40A §3 — Affordable Homes Act 2024. ADUs by Right: Yes — on owner-occupied single-family lots. Max Size (Internal): Up to 900 sq ft (municipalities may limit). Bans Allowed?: No — cities cannot ban ADUs under new state law.
Weymouth FAQ
Can I build an ADU on my property in Weymouth?
Weymouth Town Council passed ADU Ordinance Amendment (Measure 24-119) adding Article 29 to Chapter 120. ADUs are allowed by right on single-family lots up to 900 sq ft or 50% GFA. Lots under 5,000 sq ft are ineligible.
What are the size limits for an accessory dwelling unit in Weymouth?
Code Section: Weymouth Code Ch. 120, Art. 29 (Measure 24-119). Max Size (small lots): 750 sq ft (lots under 25,000 sq ft). Max Size (large lots): 900 sq ft (lots over 25,000 sq ft). Ineligible Lots: Under 5,000 sq ft.
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