Renting out ADU+Portion of main house

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Hi All,

New to BP and have enjoyed reading posts and connecting with BP'ers! I am from the SF Bay Area.

I am looking to build and ADU however my city has a restrictive ordinance on size i.e. 475sq feet & max 1 bedroom & 1 bath

I have a fairly huge lot (12K) & a decent size home (2200 sq feet) which means as per the state statute I could go as high as 1100 sq feet

However if the local ordnance restricts me, I was wondering if I could add 2 bedrooms & 1 bath to the main house & then build a 1 bedroom & 1 bath attached JADU and then rent out the 3 bedrooms & 2 baths together?

Would love some advise & thanks in advance!