What is an ADU?

An Accessory Dwelling Unit (ADU), often referred to as a granny flat, in-law suite, or backyard cottage, is a secondary residential unit located on the same property as a primary home. ADUs are fully equipped living spaces that include a kitchen, bathroom, and sleeping area, offering independent living while sharing the same lot as the main house. They can be attached to the primary residence (like a basement apartment), detached (such as a standalone cottage), or even a converted structure (like a garage turned into a studio).

Key Features of ADUs

• Size: Typically smaller than the primary home, ranging from 300 to 1,200 square feet, depending on local zoning regulations.
• Purpose: ADUs serve various needs, such as housing aging parents, providing rental income, or creating space for adult children or guests.
• Flexibility: They can be customized to fit different lifestyles, from minimalist studios to multi-bedroom units.
• Sustainability: ADUs promote efficient land use, offering affordable housing options without requiring new land development.

Benefits of ADUs

According to AARP, ADUs are gaining popularity as a solution for multigenerational living and affordable housing (AARP, 2019). They allow homeowners to:

• Support Family: Provide a home for relatives while maintaining privacy.
• Generate Income: Rent out the unit for additional revenue.
• Increase Property Value: Enhance the home’s marketability with a versatile living space.
• Age in Place: Offer accessible, low-maintenance living for older adults.

Considerations

Before building an ADU, check local zoning laws, as regulations vary widely. Some areas restrict ADU size, placement, or rental permissions. Construction costs can range from $50,000 to $400,000 or more, depending on design and location, but the long-term financial and lifestyle benefits often outweigh the initial investment.ADUs are a practical, versatile housing solution, blending affordability, independence, and community. Whether you’re looking to accommodate family or explore new income streams, an ADU might be the perfect addition to your property. Source: AARP - Accessory Dwelling Units Defined