are you talking about a free standing wall?  Permits aren’t even required in many areas if it’s 6’ or less.   Usually anything over 6’ requires engineering.   

Sir, I would think you draw a plan, section, and elevation of the said wall and run it by the building dept. Is this a garden wall? If you are putting loads on it, that changes the whole process, then, you are doing a retaining/or not foundation wall. Definitely you need engineering unless you can do the calcs as well as the dwg's and put your stamp on it.

I'm guessing you're recalling something like this where standard details are offered that will work for the standard conditions covered (including a maximum height). https://www.buildingincaliforn...

1. Assuming you are referring to the California Building Code (not, e.g., Connecticut or Croatia), there are no limitations (either in the Code or the Practice Act) on what an Architect can design, although many California AHJs do require a Structural Engineer for structures over some limitation (typically height), or for all structures in the case of DSA and OSHPD.
2. Garden walls ≤6' are defined as "fences" and therefore not regulated by CBC, although almost all local jurisdictions have amended that. I'm unaware of any jurisdiction (besides DSA and OSHPD) that require a licensed professional  - most local AHJs have a handout like the one linked above, but they will also generally accept 6' walls designed by unlicensed persons, and jurisdictions that don't have their own handout will generally accept the handouts from other jurisdictions as "construction documents" for block wall permits.