ADU Types

ADU Types: Compare Your Options

The best ADU type depends on your property, budget, privacy needs, construction constraints, and local rules. Compare the main approaches before committing to a floor plan.

Common ADU approaches

  • Detached ADU: a separate backyard or side-yard dwelling.
  • Attached ADU: new living space connected to the primary home.
  • Garage conversion: convert an existing garage where local rules allow.
  • Interior conversion: create a separate unit within an existing structure.
  • Above-garage ADU: add a dwelling over an existing or new garage where feasible.

Future guides will compare cost, privacy, permitting complexity, construction disruption, accessibility, and property-fit considerations for each type.