What a beautiful house, I'm impressed.

I, too, enjoy replicating real-life architecture in The Sims. I'm very new to Sims 4, and have only built one small house so far, but made many houses in Sims 3. So I'm curious as to what kinds of obstacles you encountered in Sims 3 for this house, that were not a problem in Sims 4.

absolutely my type! so realistic, i like everything about this house, i wanna live in there too.

I don't want to knock TS3 and make it sound like it was 'impossible' to build this in that game. Obviously the layout and furnishings/decor would be achievable in TS3. It's more that TS4 has additional features in build mode that better replicate the architectural details of this house (ie: spandrels, corbels, higher ceilings, greater control of window placement; even the way counters and upper cabinets can be altered). When I worked on this house using TS3 only, I had a hard time replicating those details without the use of CC; even with the CC it wasn't quite right, and the objects were hard to place. It's also worth mentioning that I played in this house in TS4, and found it to be totally routable and playable.

I love this duplex. Also as any idea that differs from "just my two-story house, three-story, house with basement" and so on.
As for me. I'd have such thing from TS3 here as ability to add entrance door to custom placed apartments. This thing was in TS2, TS3 and suddenly at TS4 was missed. But making 1st floor apartment being spawned by game created PC would be really suitable here.
Oh, and patio as well as mansard here is just delicious!
So many thanks for this and best wishes to see more from you. Vic ^_^

Today a lot of people's gonna DL a lot of houses like this one to install in the fugly glimmerbrook region.
I am one of them. LOL
High demand for this type of estate I guess now.