San Jose homeowners who are considering an ADU often have the same first question: “What can I build?”

That is a reasonable question, but it is not specific enough. A better first question is: “Which ADU floor plans are accepted or listed in my local program, and what do I still need to verify?”

Pre-approved ADU plans can help homeowners compare options before hiring a designer or committing to a provider. But local context matters. San Jose has its own program information, provider records, fee notes, permit requirements, and source links that homeowners should review before making a decision.

A good place to begin is the San Jose pre-approved ADU plans page on ADU Plan Finder . It helps you compare local ADU plan listings, plan sizes, providers, approval status, source links, permit requirements, and fees.

Why start with a local plan directory?

If you search the web for ADU floor plans, you will find hundreds of attractive designs. Some are prefab units. Some are architectural concepts.…