We are both in California, and as a rule, condos are relatively straight-forward propositions. However, my experience is that when there is an odd-ball (due to the specifics of the unit, project, or the market) they can be more complex than what a complex SFR might be (one can always do the cost approach on a house if needed).
I appraised a condo in SF a few months ago. San Francisco, like most other high-density urban centers, has a lot of condos. Should be a no-brainer, right? Wrong!
Because of the specifics of the subject, its project, and the market at the time, I needed to use 8 comparable sales (one of which sold 9 years prior; another 4 years prior) and had about 5 pages of paired sales, graphical analysis, etc., to support my adjustments as well as an additional page and a half of commentary at the beginning of the report explaining why I did what I did in a market where, if anyone looks at the sales data, will find plenty of condominium units sold, pending, and listed.
Fortunately for me, during my pre-research of the assignment, I correctly identified why this was going to be a royal PIA. My fee and turn-time was quoted appropriately (I was actually a bit surprised when the client accepted my terms).
My point is this: In my experience, condos have a lot of moving parts (unit type, project-amenities/type, unit location, submarket and market); I find these factors can be much more discrete (requiring a deeper level of analysis to discern) and influential than the same forces (location, neighborhood, size/type) that typically influence value for an SFR.
When we are lucky enough to have a unit in a large complex or a smaller project that is consistent with other smaller projects and the unit is more or less the market standard, the assignment is simple; chances are we will have model-matches or near model-matches in that scenario.
When we are not so lucky, the analysis can quickly become complex. I typically charge more for a condo than an SFR, all other things being the same, because I find, pound for pound, they take more work.