The zoning laws for Accessory Dwelling Units (ADUs) in Cumberland, Rhode Island, are guided by statewide regulations and specific local requirements. Here is a summary of key points:
Number of Units Allowed: Only one ADU is permitted per lot. This applies to owner-occupied properties, lots with a minimum area of 20,000 square feet, or ADUs located within the existing footprint of a primary structure.
Building Size: Municipalities may set maximum unit sizes, but they must allow:
- At least 900 square feet for a studio or one-bedroom ADU, or 60% of the floor area of the principal dwelling, whichever is less.
- At least 1,200 square feet for a two-bedroom ADU, or 60% of the floor area of the principal dwelling, whichever is less.
Building Height: ADUs must comply with the height restrictions applicable to accessory structures in the same zoning district.
Setback Requirements: ADUs must adhere to the same setback requirements as other accessory structures in the respective zoning district.
Parking: The requirement is limited to one off-street parking space per bedroom of the ADU.
Owner-Occupancy: The property must be owner-occupied, particularly if the ADU is being created as a reasonable accommodation for family members with disabilities.
Rental Requirements: ADUs cannot be rented for tourist or transient use, and there are no restrictions based on familial relationships or age for tenants.
Additional Requirements:
- Municipalities cannot impose additional lot area, lot frontage, or lot width requirements solely for the inclusion of an ADU.
- No additional infrastructure improvements are required beyond what is necessary for code compliance.
- The development of ADUs is exempt from moratoriums or limitations on residential unit development in residential zones.
- ADUs cannot be disassembled upon transfer of title or change in occupancy.
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