An attached ADU, or Accessory Dwelling Unit, is a secondary living space that is attached to the main dwelling of a single-family home. Unlike a detached ADU, which is a separate structure, an attached ADU is integrated into the existing home and shares walls, roofs, or foundations with the main dwelling.

Attached ADUs are typically designed to blend in with the main home and can range in size from a small studio to a larger, multi-room unit. They often include a kitchenette, bathroom, and sleeping area and may include additional amenities such as a living room or outdoor space.

Like detached ADUs, attached ADUs can offer homeowners a range of benefits, including increased property value, rental income, and the ability to accommodate changing family needs. However, there may also be some challenges involved in building an attached ADU, such as navigating local zoning and building codes, securing financing, and ensuring the unit meets accessibility and safety requirements.

In general, attached ADUs are a cost-effective and space-efficient solution for homeowners looking to add additional living space to their property while maintaining a sense of continuity with the main home