Hello! I've taken several screenshots of what I've been working on recently, just a few parts of a much larger structure. It's from a modded playthrough of the game, but the only modded tiles are the potions on the shelves, some of the food on the tables, and the background wall I like to use in the kitchen, which you can almost certainly find replacements for if you're creative enough. Each "house" has several different rooms (equipped with Stinkbugs so NPCs don't move into the bathroom lol), which are immensely helpful to the believability and overal detail of the build. To be honest, making multi-room apartments has kind of poisoned my perception of building now (including my own past creations), as whenever I see a house without a bedroom, kitchen,
and bathroom it feels too small and unbelievable.
Here's the Demolitionist's house. I very nearly searched "What do you need to create explosives" when I was thinking of things to put in his workshop before I caught myself; I don't want to be put on any lists.
Here's the Pirate's Apartment. A lot of my building "style" is just putting furniture where it logically should go: Pot, Countertop, and Sink next to the Wood Stove in the kitchen. Food and drinks on the table or on a shelf. Piggy Bank, Chest of personal affects, books, and a Dresser in the bedroom. Sink, Bathtub, Toilet in the bathroom, maybe some bottles on the shelf for soaps.
Tavernkeep and Party Girl's Apartment. They really like to throw parties, so I made them an extra large living/dining room and Kitchen Combo for that exact purpose! They even have a coatroom for guests to hang up their hats and coats (Now that I think about it, maybe that'd make more sense if that door led outside, rather than the hallway)

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Here's a few more, built with mostly the same layout. Nothing fancy here.
I know I've crammed an absurd amount of detail into these, but really all I've done is put things in places they'd logically go. Glasses and Food on the table. Sink and Cookpot in the kitchen. Dresser, Bed, maybe a Couch in the bedroom. Sink, Toilet and Bath in the bathroom, with maybe a bottle of soap or two on the shelf above. It's really not that advanced, but it looks fantastic and you can build it out of very simple materials without any crazy building techniques. It does require effort and patience, but I've been
really enjoying putting them together, and completing each apartment is extremely satisfying.