What are the four types of ADUs?

Accessory dwelling units generally fall into four categories: an attached unit built onto the main home, a detached unit standalone in the yard, a garage conversion that turns existing garage space into living space, and a basement or interior conversion carved out of existing square footage. Which types a specific property can actually build depends on local zoning, lot size and setback rules rather than the general category itself. Joel Boss can help identify which type fits a specific lot once zoning is confirmed.