Adding foundation on converted garage

[Federico Morales]

Hello guys, 

I have a garage converted to granny unit which needs foundation added in order to bring it into compliance with City of San Jose. It currently has slab foundation, but I think insufficient.

Wondering if anyone in the SJ area has done a conversion of garage into granny like this and what the options and best strategies are. 

Inspector said we can add four corners (according to conversations with my dad), so I was wondering if that's realistic. 

Has anyone else done it or something similar? 

Thanks, 

Federico