Lakewood Duplex adding 2 ADUs

[Alina Ho]

Hi, I somewhat new to real estate. I have a duplex in Lakewood (unincorporated LA county) zoned MFR on a 7300 sqft lot. I verified with the city and was told that we can add up to two adu's on the property. Would it be more cost effective to convert a detached garage and build a new adu? What is the difference in building two ADUs vs building two more units and converting the duplex to a fourplex? I'm thinking maybe different construction requirements? Or are they essentially the same thing? I'm under the impression adu's don't appraise as much as if it was converted to a fourplex.