Accessory Structures in New Bedford, MA (2026)
4 verified accessory structures rules for New Bedford, Massachusetts, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Under Massachusetts law (Ch. 358 of Acts of 2024, effective Feb 2025), ADUs under 900 sq ft are allowed by right on single-family lots. New Bedford's Planning Department has prepared an ADU zoning ordinance update. ADUs must have a separate entrance and cannot exceed 900 sq ft or half the principal dwelling area.
New Bedford ADU (Accessory Dwelling Unit) Rules
Some RestrictionsShed Rules
In New Bedford, one-story detached accessory structures under 200 sq ft (tool/storage sheds, playhouses) are generally exempt from building permit requirements. Larger structures require permits at $0.15 per sq ft with a $50 minimum. Structures must comply with zoning setbacks.
New Bedford Shed & Outbuilding Rules
Few RestrictionsGarage Conversions
Garage conversions in New Bedford require building permits and must comply with the zoning ordinance and 780 CMR building code. Conversions to living space must meet residential code standards for egress, insulation, and fire safety. ADU conversions may be allowed by right under the 2025 state law if under 900 sq ft.
New Bedford Garage Conversion Rules
Some RestrictionsCarport Rules
New Bedford regulates carports as accessory structures under Chapter 9 (Comprehensive Zoning), Section 2330. Accessory buildings cannot exceed 18 feet in height (Sec. 2333), must sit at least 30 feet back from the front street line (Sec. 2334), and must keep at least 4 feet from the rear lot line for detached garages (Sec. 2331). Accessory structures may not occupy more than 40 percent of the required rear yard (Sec. 2332). Building permits are issued under 780 CMR.
Carport Rules in New Bedford
Some RestrictionsLooking for Bristol County county-wide rules?
County ordinances apply to unincorporated areas and may supplement New Bedford city rules.
Accessory Structures in Bristol County →