Building Plans for an ADU - Plus - an Extension to rear of the house in CA, USA

I need to have a complete building plan (Archi Plan, Structural Plan, calculations and Title 24 ) for my projects to be approved by the city.

1. Building Plan to build a 1000 sq. ft. - 3 bedroom 2 bath ADU in the backyard.

2. Building Plan to add ~495 sq. ft. - 3 bedroom 2 bath and a laundry area to the rear of the existing house.

The plan will require a local professional engineer's STAMPs in order to be approved for permits.

see attached detailed site plan.