Somerville Zoning & Land Use Guide
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Key Zoning Facts
Regulatory Layers That Apply in Somerville
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA Flood Zones: Applicable
- View FEMA Flood Map
State — Massachusetts
- Building Code: MA State Building Code (780 CMR, based on 2021 IBC)
- State ADU Override: Yes (MA ADU Law (2024) — requires single-family zones to allow ADUs by right)
County — Middlesex County
- Role: Property records, tax assessment, unincorporated area planning
City / Municipal
The city's zoning ordinance, building codes, and local permits form the primary layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- HOA / CC&Rs common: Yes
- Check HOA CC&Rs for additional restrictions.
Primary Zoning Districts
| District Code | Name | Min Lot | Max Height | Front Setback | Side Setback | Rear Setback | FAR |
|---|---|---|---|---|---|---|---|
| NR | Neighborhood Residential | 3,000 sq ft | 35 ft | 10 ft | 6 ft | 20 ft | — |
| UR | Urban Residential | 2,500 sq ft | 55 ft | 5 ft | 5 ft | 15 ft | — |
| CC | Commercial Core | None | 65 ft | 0 ft | 0 ft | 10 ft | — |
ADU Rules in Somerville
ADUs:Allowed
- Max Size
- 900 sq ft
- Max Height
- 20 ft
- Rear Setback
- 5 ft
- Side Setback
- 5 ft
- Parking
- No additional parking required
- Owner Occupancy
- Not required under state ADU law
- Permit Timeline
- 60-90 days
Official Sources
Frequently Asked Questions
Frequently Asked Questions
Can I build an ADU in Somerville?
Yes. Under the 2024 Massachusetts ADU law, single-family zones must allow ADUs by right. Somerville has been a leader in ADU-friendly zoning and permits units up to 900 sq ft.
How do I find the zoning for my property in Somerville?
Use the Somerville Planning and Zoning Division's online zoning map or contact the office for a parcel-specific determination.
What zones allow multi-family housing in Somerville?
Multi-family housing is permitted in Urban Residential, Mid-Rise, and Commercial Core districts. Somerville's zoning overhaul broadly expanded multi-family allowances.
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Zoning codes and building regulations change frequently. Always verify current requirements with your local planning department and building authority before making any decisions.