I guess this whole area should be commercial, probably retail, landuse. For tiny extras like a car washes, mapped usually don't bother with tiny different landuses (i.e. not retail, just commercial).

For actual territory - it's an educated guess between cadaster lines, actual obvious use and whatever looks like is used. City mapping, when one starts asking questions, get difficult really quickly. There are many mapper opinions how this should best be mapped. I suggest not including generic sidewalks and starting somewhere on the grass to include all the inner footways, parking, etc. This region doesn't have any landuse traced at the moment. I guess similar to https://www.openstreetmap.org/way/218699677