Waltham Zoning & Land Use Guide
Last updated: Verified:
Key Zoning Facts
Regulatory Layers That Apply in Waltham
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 |
|---|---|---|---|---|---|---|---|
| R-1 | Residence A | 8,000 sq ft | 35 ft | 20 ft | 10 ft | 25 ft | — |
| R-3 | Residence C | 3,500 sq ft | 50 ft | 10 ft | 6 ft | 15 ft | — |
| C-1 | Commercial A | 3,000 sq ft | 45 ft | 0 ft | 0 ft | 10 ft | — |
ADU Rules in Waltham
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
- 45-75 days
Official Sources
Frequently Asked Questions
Frequently Asked Questions
Can I build an ADU in Waltham?
Yes. Under the 2024 Massachusetts ADU law, single-family zones must allow ADUs by right. Waltham permits ADUs up to 900 sq ft.
How do I find the zoning for my property in Waltham?
Visit the Waltham Planning Department website or contact the department directly for parcel-specific zoning information.
What zones allow multi-family housing in Waltham?
Multi-family housing is permitted in the Residence C district and various commercial and mixed-use zones.
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.