Taunton's Accessory Structures: The Rules That Matter

Every city handles accessory structures a little differently. In Taunton, Massachusetts, there are 4 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Carport Rules

Taunton Zoning § 440-201 lists carports as accessory structures. Under § 440-711, carports must be subordinate to the principal use, with length-to-width ratio not exceeding 3:1. Carports 120 sq ft or less get reduced side and rear setbacks at 2/3 of the underlying district requirement.

Key details: Definition: Carport = accessory structure (§ 440-201). Code Section: § 440-711. Length:Width Cap: 3:1 maximum. Reduced Setback: 2/3 of district (≤120 sq ft). Building Permit: Required if >200 sq ft (780 CMR 105).

Carports built without required setbacks, exceeding the 3:1 length-to-width ratio, or constructed without a required building permit (over 200 sq ft) are zoning violations enforced under MGL c. 40A, § 7 by Taunton's Building Commissioner. Remedies include cease-and-desist orders, daily fines up to $300 per offense, and orders to remove or relocate the structure. Unpermitted electrical or structural work triggers separate enforcement under 780 CMR and 527 CMR.

Garage Conversions

Garage conversions in Taunton require building permits and must comply with the zoning ordinance Ch. 440 and 780 CMR building code. Conversions to living space must meet residential code standards. ADU conversions may be allowed by right under the 2025 state law if under 900 sq ft.

Key details: Permit: Building permit required. Zoning: Ch. 440 compliance required. ADU Option: By right if under 900 sq ft (state law). Code: 780 CMR residential standards.

Unpermitted conversion: code enforcement. Must bring to code or restore. Safety violations: immediate correction.

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 statewide, including Taunton. ADUs must have a separate entrance and cannot exceed 900 sq ft or half the principal dwelling area. Building permits are required.

Key details: State Law: Ch. 358 Acts of 2024 — by right. Max Size: 900 sq ft or 50% of principal dwelling. Effective Date: February 2, 2025. Owner Occupancy: Cannot be required by municipality.

Municipalities cannot deny conforming ADU applications. Unpermitted ADU: standard building code enforcement under 780 CMR.

Shed Rules

Taunton requires building permits for accessory structures over 200 square feet per the city's Permit FAQ. Any size structure requires Planning Department approval under §440-711. Structures must comply with zoning district setback requirements. Utility sheds and garages limited to 2 car bays require scale plans.

Key details: Over 200 sq ft: Building permit required. All Sizes: Planning Dept approval (§440-711). Garages: Limited to 2 car bays for residential. Plans: Scale drawing with dimensions required.

Unpermitted structure: retroactive permit with penalty. Setback violation: modification or removal. Habitation: immediate correction.

The Bottom Line

Taunton's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Taunton is broadly strict or permissive.

These rules come from Taunton's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.