What is the path to legally converting a duplex to a triplex?

[Stephen G.]

In the not too distant future, my tenants might be moving out of their 3/2 unit and I would like to convert it to a 2/1 and 1/1. I would need to install a kitchen in the new lower unit and potentially a laundry unit. It already has a separate entrance so that helps. 

Is the process:

1. Engage the city for approval

2. Engage a contractor for plans

3. Submit to city for approval and permits

4. Begin and complete work

Alternatively, I can tear down the detached garage and install a new unit or duplex there but that sounds like more work, more time, and more investment. 

If you’ve gone through this process in Oakland, I’d really welcome your feedback!