What Is an Accessory Dwelling Unit (ADU)?
An Accessory Dwelling Unit (ADU) is a self-contained living space built on the same lot as a primary single-family home. It includes a kitchen, bathroom, and sleeping area, making it suitable for independent living. ADUs can be detached structures, such as backyard cottages, or attached units, like converted basements or additions to the main house.
Aspect | Details |
---|---|
Definition | A secondary living unit on the same lot as a primary residence. |
Forms | Detached, attached, or converted spaces (e.g., garage, basement). |
Uses | Housing family, renting, guest suite, home office, hobby room. |
Size | Typically 800–1,200 sq ft; JADUs up to 500 sq ft. |
Utilities | Shares connections with the main home but may have separate meters. |
Ownership | Cannot be sold separately from the main home. |
Legal & Zoning | Must comply with local codes, zoning rules, and may require permits. |
Costs & Taxes | Construction costs vary; may increase property taxes and utility bills. |
Pros | Adds property value, creates income, maximizes land use, offers flexibility. |
Cons | High upfront cost, maintenance responsibilities, possible space reduction. |
ADUs have gained popularity due to their versatility and ability to provide extra living space or generate rental income. They promote efficient land use in urban areas, reducing the need for new housing developments. With the rise of prefabricated models and streamlined financing options, ADUs have become more accessible for homeowners looking to expand their living options.
Junior ADUs (JADUs) are smaller versions of ADUs, usually under 500 square feet, often built within existing home structures. They offer a cost-effective way to add separate living areas with their own entrances and efficiency kitchens, while adhering to local codes and regulations.
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