ADU Plan Finder allows users to search for pre-approved ADU (Accessory Dwelling Unit) plans and floor plans by city. It provides access to official city and county ADU plan programs, enabling users to compare accepted floor plan details and verify provider, permit, and source links. The platform summarizes public information and encourages users to verify the current status with the official city or county source before relying on a plan. Users can browse plan catalogs for pre-approved ADU plans by state or county, with specific sections dedicated to county-level accepted plan records.