@Kevin Chen - Thanks for the response, Kevin. Oakland does have its own zoning regulations (here), but it appears to be dated. I am hopeful that the new CA ADU supersedes these regulations and my small ADU is the exception.
For context, I am planning on building a backyard ADU next year, but need to install a driveway/parking lot now (to get tenants in). My plan is to pave the areas that I need with concrete, then save room for the ADU down the road. I have enough space for 4' setback on the side and rear of the property to build a small ADU (approx 450sqft). My lot is ~7,500 sqft. My biggest concern is that my parking lot/driveway will disqualify me from building a backyard ADU, since the only impervious surface will be my front yard. I'd like to avoid going the pavers route due to costs, unless I can 100% confirm that concrete will prevent my future ADU project. It sounds like my case may fit into the CA ADU exception, I'm just trying to find out how to confirm before I spend a lot of money on paving my driveway/parking lot.
I've tried emailing the Oakland Building, but they haven't responded. They're not answering phones either :(