Public ADU information is only useful when it is easy to find, source-backed, and kept reasonably current. Unfortunately, local ADU plan programs can be scattered across city pages, county PDFs, provider catalogs, planning portals, archived documents, and building department updates. That makes research difficult for homeowners. It also makes it harder for providers, city staff, and housing advocates to point people toward reliable information. If you know about an official ADU plan program that is missing from a public directory, you can help improve the data. ADU Plan Finder includes a submission process for official city, county, provider, or plan source links that can be reviewed for possible inclusion. Why missing ADU data matters A missing local program can cause several problems. Homeowners may assume no pre-approved plans exist in their area. Providers may receive fewer relevant inquiries. City staff may answer the same basic questions repeatedly.…