Here some of the duplex houses, aka tow family homes, I'v built thoses in east whitestone, greenfield, nearby the university, use to be 1960's as era and I think I'v done prety well, to match with the Californian style, they all have full interior like other builds in greenfield.

These homes will be in the next update of greenfield, oviously, took me a long time (barely 2 hours per house), so diamond if you like