Providence has updated its ADU ordinance to comply with new state laws. Below are the up-to-date requirements to build an ADU in the city. Last updated July 28, 2024.
Zoning
All properties zoned for single family, two-family or multifamily may be eligible to build ADUs.
Number of units
Typically, one ADU is allowed per single-family lot. However, this can vary based on local zoning ordinances and specific property conditions
Building size
The size of an ADU is generally restricted to be smaller than the primary dwelling. Providence caps the size at 700 square feet or 40% of the main house’s floor area, whichever is less.
Building height
- ADUs must adhere to height restrictions that usually limit them to a single story or the height of a typical residential structure in the neighborhood. This means a maximum height of 20 feet.
- There are no height limits for conversions within existing, permitted structures.
Setbacks
ADUs must comply with the same setback requirements as primary dwellings. This typically includes a minimum distance from property lines, such as 5 feet from side and rear property lines. Front setbacks must also be observed, which may vary by zone
Parking
Providence requires that an ADU provide at least one additional off-street parking space. However, there may be flexibility in areas with ample street parking or for properties near public transit
Owner-occupancy
The owner of the property must live in either the main house or the ADU. This requirement helps ensure that the property is maintained and that ADUs do not become speculative rental properties
Rental
ADUs can be rented, but there are often restrictions on short-term rentals (e.g., Airbnb). Long-term rentals are typically allowed, provided they comply with local housing and safety codes
Watch-outs
ADUs must comply with all local building codes, including those related to safety, health, and energy efficiency. They also need separate utility connections for water, electricity, and sewage.
Are you in a historic district? Do you have a utility easement over your property? Reach out to us and we’ll help you build a custom ADU to fit your unique property characteristics and local regulations!
These regulations are designed to increase housing availability while preserving the character of existing neighborhoods. For detailed and current information, it is always recommended to consult the local zoning office or relevant municipal resources.
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